NYKM Series

Molded Case Circuit Breaker

（10-1250A）

Compact Safe Wide application Diversity

PRODUCT OVERVIEW

NYKM series molded case circuit breaker features small size, high breaking capacity, multiple specifications and full range of accessories, which is widely used in industrial, commercial, residential and infrastructure projects. It can meet customized needs with highly flexible systems to realize intelligent control and management.

DOUBLE INSULATION DESIGN

FLAME-RETARDANT AND HIGH
TEMPERATURE RESISTANT CASING

Adopts flame-retardant and high temperature resistant casing can effectively protect electrical equipment from the threat of fire and high temperature. We pay attention to details and structural stability in design to ensure that the product can operate normally in various harsh environments.

MULTIPLE TRIPPING MODES

Thermomagnetic mode

Overload long delay protection

Short-circuit instantaneous protection

Leakage mode

Overload long delay protection

Short-circuit instantaneous protection

Leakage protection

Electronic mode

Overload long delay protection

Short-circuit instantaneous protection

Short-circuit short delay protection

Grounding fault protection

485 communication function

Technical Parameters

NYKM2 Series Thermomagnetic Molded Case Circuit Breaker

Model Rated operating voltage Ue(V) Casing current Inm(A) Rated currentIn(A) Rated insulation voltage Ui(V) Rated impulse withstand voltage Uimp(kV) Number of poles Rated ultimate short -circuit breaking capacity code Short-circuit breaking capacity
Rated ultimate short-circuit breaking capacity Icu(kA) Rated operating short-circuit breaking capacity Ics(kA)
400V 690V 400V 690V
NYKM2-63 AC400 63 10,16,20,25,32,40,50,63 AC500 AC8 3P L 35 - 18 -
3P,4P M 50 - 25 -
NYKM2-100 AC400,AC690 100 16,20,25,32,40,50,63,80,100 AC800 AC8 3P L 35 20 22 10
3P,4P M 65 20 35 10
H 85 20 50 10
NYKM2-225 AC400,AC690 225 100,125,140,160,180,200,225 AC800 AC8 3P L 35 20 22 10
3P,4P M 65 20 35 10
H 85 20 50 10
NYKM2-250 AC400,AC690 250 100,125,140,160,180,200,225,250 AC1000 AC8 3P L 36 20 27 15
3P,4P M 50 20 40 15
H 85 20 65 15
NYKM2-400 AC400,AC690 400 225,250,315,350,400 AC800 AC8 3P,4P L 50 15 35 10
M 65 20 42 15
H 100 20 65 15
NYKM2-630 AC400,AC690 630 400,500,630 AC800 AC8 3P,4P L 50 15 35 10
M 65 20 42 15
H 100 20 65 15
NYKM2-800 AC400,AC690 800 630,700,800 AC1000 AC8 3P,4P M 75 20 65 15
H 100 20 75 15
NYKM2-1250 AC400,AC690 1250 800,1000,1250 AC800 AC8 3P - 65 15 32.5 10

NYKM2L Series Leakage Molded Case Circuit Breaker

Model Rated operating voltage Ue(V) Casing current Inm(A) Rated currentIn(A) Rated insulation voltage Ui(V) Rated impulse withstand voltage Uimp(kV) Number of poles Rated ultimate short -circuit breaking capacity code Short-circuit breaking capacity Rated residual short-circuit making (breaking) capacity I△m(kA) Rated residual operating current I△n (mA) Rated residual non-operating current I△no
Rated ultimate short-circuit breaking capacity Icu(kA) Rated operating short-circuit breaking capacity Ics(kA)
NYKM2L-125 AC400 125 16,20,25,32,40,50,63,80,100,125 AC1000 AC8 3P,4P M 50 35 1/4Icu 100/300/500 1/2I△no
H 85 50
NYKM2L-250 AC400 250 100,125,140,160,180,200,225,250 AC1000 AC8 3P,4P M 50 35 100/300/500
H 85 50
NYKM2L-400 AC400 400 225,250,315,350,400 AC1000 AC8 3P,4P M 65 42 100/300/500
H 100 70
NYKM2L-630 AC400 630 400,500,630 AC1000 AC8 3P,4P M 65 42 300/500/1000
H 100 70

NYKM2E Series Electronic Molded Case Circuit Breaker

Model Rated operating voltage Ue(V) Casing current Inm(A) Rated currentIn(A) Rated insulation voltage Ui(V) Rated impulse withstand voltage Uimp(kV) Number of poles Rated ultimate short-circuit breaking capacity code Short-circuit breaking capacity
Rated ultimate short-circuit breaking capacity Icu(kA) Rated operating short-circuit breaking capacity Ics(kA)
400V 400V
NYKM2E-100 AC400 100 16,20,25,32 32,36,40,45,50,55,60,63 63,65,70,75,80,85,90,95,100 AC800 AC8 3P,4P M 50 35
H 85 50
NYKM2E-225 AC400 225 100,125,140,160,180,200,225 AC800 AC8 3P,4P M 65 35
H 85 50
NYKM2E-250 AC400 250 100,125,140,160,180,200,225,250 AC1000 AC8 3P,4P M 50 50
3P H 85 50
NYKM2E-400 AC400 400 200,225,250,280,315,350,400 AC800 AC8 3P,4P M 65 42
H 100 65
NYKM2E-800 AC400 800 400,420,440,460,480,500,530,560,600,630 630,640,660,680,700,720,740,760,780,800 AC800 AC8 3P,4P M 65 42
H 100 65

NYKM3 Series Thermomagnetic Molded Case Circuit Breaker

Model Rated operating voltage Ue(V) Casing current Inm(A) Rated currentIn(A) Rated insulation voltage Ui(V) Rated impulse withstand voltage Uimp(kV) Number of poles Rated impulse withstand voltage Uimp(kV) Rated ultimate short-circuit breaking capacity Icu(kA) Rated operating short -circuit breaking capacity Ics(kA)
415V 690V 415V 690V
NYKM3-63 AC415V 63 10,16,20,25,32,40,50,63 AC1000V AC8 3P,4P   L 36 12 36 10
M 55 12 40 10
NYKM3-125 AC415V,AC690V 125 16,20,25,32,40,50,63,80,100,125 AC1000V AC8 3P,4P   L 50 20 40 10
M 75 20 55 10
H 100 20 70 10
NYKM3-250 AC415V,AC690V 250 100,125,140,160,180,200,225,250 AC1000V AC12 3P,4P   L 50 20 40 10
M 75 20 55 10
H 100 20 70 10
NYKM3-400 AC415V,AC690V 400 225,250,315,350,400 AC1000V AC12 3P,4P   L 55 20 55 15
M 75 20 75 15
H 100 20 85 15
NYKM3-630 AC415V,AC690V 630 400,500,630 AC1000V 3P,4P   L 55 20 55 15
M 75 20 75 15
H 100 20 85 15
NYKM3-800 AC415V,AC690V 800 630,700,800 AC1000V 3P,4P   M 75 20 75 15
H 100 20 85 15

NYKM3L Series Leakage Molded Case Circuit Breaker

Model Rated operating voltage Ue(V) Casing current Inm(A) Rated currentIn(A) Selective category Rated insulation voltage Ui(V) Rated impulse withstand voltage Uimp(kV) Number of poles Rated ultimate short -circuit breaking capacity code Short-circuit breaking capacity Rated residual short-circuit making (breaking) capacity Rated residual operating current I△n（mA） Rated residual non -operating current I△no
Rated ultimate short-circuit breaking capacity Icu(kA) Rated operating short -circuit breaking capacity Ics(kA) Ⅰ type Ⅱ type
400V 400V
NYKM3L-125 400V 125 16A,20A,25A,32A,40A,50A,63A,80A,100A,125A Category A 1000V 8KV   3 M 50 35 Icu×25% 100,300,500 30,100,300 I△n×50%
4 M
3 H 85 50
4 H
NYKM3L-250 400V 250 100A,125A,140A,160A,180A,200A,225A,250A Category A 1000V 8KV   3 M 50 35 Icu×25% 100,300,500 30,100,300 I△n×50%
4 M
3 H 85 50
4 H
NYKM3L-400 400V 400 225A,250A,315A,350A,400A Category A 1000V 8KV   3 M 65 42 Icu×25% 100,300,500 300,500,1000 I△n×50%
4 M
3 H 100 70
4 H
NYKM3L-800 400V 800 630A,700A,800A Category A 1000V 8KV   3 M 65 42 Icu×25% 100,300,500 300,500,1000 I△n×50%
4 M
3 H 100 70
4 H

NYKM3E Series Electronic Molded Case Circuit Breaker

Model Rated operating voltage Ue(V) Casing current Inm(A) Rated currentIn(A) Rated insulation voltage Ui(V) Rated impulse withstand voltage Uimp(kV) Use category Number of poles Rated ultimate short-circuit breaking capacity code Short-circuit breaking capacity
Rated ultimate short-circuit breaking capacity Icu(kA) Rated operating short-circuit breaking capacity Ics(kA)
400V 690V 400V 690V
NYKM3E-125 AC415V, AC690V 32 12,14,16,18,20,22,25,28,30,32 AC1000V AC8 A 3P,4P M 70 20 50 15
63 25,28,32,36,40,45,50,56,60,63
125 50,63,70,75,80,85,90,95,100,125 H 85 70
NYKM3E-250 160 63,70,75,80,90,100,125,140,150,160 A 3P,4P M 70 20 50 10
250 100,112,125,140,150,160,180,200,225,250 H 85 70
NYKM3E-400 400 160,180,200,225,250,280,315,350,375,400 B 3P,4P M 70 20 65 15
H 100 75
NYKM3E-630 630 250,280,315,350,375,400,450,500,560,630 B 3P M 70 20 65 15
H 100 75
NYKM3E-800 630 250,280,315,350,375,400,450,500,560,630 B 3P,4P M 75 20 65 15
800 315,350,400,450,500,560,630,700,760,800 H 100 75
Selection table

NYKM2 250 M P 3 2 00 2 B 250 Installation method
Product code Housing grade Breaking capacity Operation mode Pole No. Type of tripping device Accessory code Application code N-pole code Rated current Installation method
NYKM2：
Thermo -magnetic Molded Case Circuit Breaker 		63A
100A
225A
250A
400A
630A
800A
1250A 		L:Basic type
M:Standard type
H:High breaking type		 Z:Manual operation
P:Electric operation
None: Direct operation		 3：3 pole
4：4 pole		 2：Electro-magnetic type
3：Thermo-magnetic type
0：No trip		 Refers to accessory table 2:Motor protection
None: Power distribution protection		 A:No overcurrent protection, N pole is always switched on
B:No overcurrent protection, N pole is switched on and off with other three pole
C:With overcurrent protection, N pole is switched on and off with other three pole
D:With overcurrent protection, N pole is always switched on		 10A,16A
20A,25A
32A,40A
50A,63A
80A,100A
125A,140A
160A,180A
200A,225A
250A,315A
350A,400A
630A,700A
800A,1000A
1250A 		Fixed wiring at front panel.
Fixed wiring at rear panel.
Plug-in wiring at front panel.
Plug-in wiring at rear panel.
Withdrawable wiring at front panel.
Withdrawable wiring at rear panel .

Note:
●   Overload alarm non-tripping device (code 3200I,4200I) is applicable to NYKM2 series molded case circuit breaker 100, 225, 250, 400, 630 housing. However, all specifications of four-pole
circuit breaker of NYKM2 series with the neutral type C and D type do not have overload alarm non-tripping function.
●  Standard inter-phase spacer.

NYKM2L Series Leakage Molded Case Circuit Breaker

NYKM2L 250 M P 3 2 00 2 B 250 Residual current Relay type Installation method
Product code Casing grade Breaking capacity Operation mode Pole No. Type of tripping device Accessory code Application code N-pole code Rated current Residual current Relay type Installation method
NYKM2L：
Leakage Molded Case Circuit breaker
125A
250A
400A
630A 		M:Standard type
H:High breaking type		 Z:Manual operation
P:Electric operation
None: Direct operation		 3：3 pole
4：4 pole		 2：Electro-magnetic type
3：Thermo-magnetic type 		Refers to accessory table 2:Motor protection
None: Power distribution protection		 A:No overcurrent protection, N pole is always switched on
B:No overcurrent protection, N pole is switched on and off with other three pole
C:With overcurrent protection, N pole is switched on and off with other three pole
D:With overcurrent protection, N pole is always switched on		 16A
20A,25A
32A,40A
50A,63A
80A,100A
125A,140A
160A,180A
200A,225A
250A,315A
350A,400A
500A
630A 		100/300/ 500mA
300/500/1000mA		 Relay type
Non-relay type 		Fixed wiring at front panel.
Fixed wiring at rear panel.
Plug-in wiring at front panel.
Plug-in wiring at rear panel.
Withdrawable wiring at front panel.
Withdrawable wiring at rear panel .

Note:
●  I: Indicates that the leakage alarm module sends out a signal and the circuit breaker is tripped at the same time.
●   II: Indicates that the leakage alarm module sends out a signal and the circuit breaker is not tripped.
●   Standard inter-phase spacer

NYKM2E Series Electronic Molded Case Circuit Breaker

NYKM2E 250 M P 3 4 00 2 B 250 Installation method
Product code Casing grade Breaking capacity Operation mode Pole No. Type of tripping device Accessory code Application code N-pole code Rated current Installation method
NYKM2E：
Electronic Molded Case Circuit Breaker 		100A
225A
250A
400A
800A 		L:Basic type
M:Standard type
H:High breaking type		 Z:Manual operation
P:Electric operation
None: Direct operation		 3：3 pole
4：4 pole		 4：Electronic display Refers to accessory table 2:Motor protection
None: Power distribution protection		 A:No overcurrent protection, N pole is always switched on
B:No overcurrent protection, N pole is switched on and off with other three pole
C:With overcurrent protection, N pole is switched on and off with other three pole
D:With overcurrent protection, N pole is always switched on		 32A
63A
100A
225A
250A
400A
630A
800A 		Fixed wiring at front panel.
Fixed wiring at rear panel.
Plug-in wiring at front panel.
Plug-in wiring at rear panel.
Withdrawable wiring at front panel.
Withdrawable wiring at rear panel .

Note:
●   Overload alarm non-tripping module (code 3400I, 4400I) is applicable for NYKM2E series molded case circuit breakers; 100, 225, 250, 400, 800 housing can be equipped with alarm non-tripping module.
●  Standard inter-phase spacer

NYKM3 Series Thermomagnetic Molded Case Circuit Breaker

NYKM3 250 M P 3 2 00 2 B 250 Installation method
Product code Casing grade Breaking capacity Operation mode Pole No. Type of tripping device Accessory code Application code N-pole code Rated current Installation method
NYKM3：
Thermo-magnetic Molded Case Circuit Breaker 		63A
125A
250A
400A
630A
800A 		L:Basic type
M:Standard type
H:High breaking type		 Z:Manual operation
P:Electric operation
None: Direct operation		 3：3 pole
4：4 pole		 2：Electro-magnetic type
3：Thermo-magnetic type
0：No trip 		Refers to accessory table 2:Motor protection
None: Power distribution protection		 A:No overcurrent protection, N pole is always switched on
B:No overcurrent protection, N pole is switched on and off with other three pole
C:With overcurrent protection, N pole is switched on and off with other three pole
D:With overcurrent protection, N pole is always switched on		 10A,16A
20A,25A
32A,40A
50A,63A
80A,100A
125A,140A
160A,180A
200A,225A
250A,315A
350A,400A
500A,630A
700A,800A		 Fixed wiring at front panel.
Fixed wiring at rear panel.
Plug-in wiring at front panel.
Plug-in wiring at rear panel.
Withdrawable wiring at front panel.
Withdrawable wiring at rear panel.

Note:
●   Overload alarm non-tripping device (code 3200I,4200I) is applicable to NYKM3 series molded case circuit breaker 100, 225, 250, 400, 630 housing. However, all specifications of four-pole circuit breaker of NYKM3 series with the neutral type C and D type do not have overload alarm non-tripping function.
●  Standard inter-phase spacer.

NYKM3L Series Leakage Molded Case Circuit Breaker

NYKM3L 250 M P 3 2 00 2 B 250 Residual current Non-relay type Installation method
Product code Casing grade Breaking capacity Operation mode Pole No. Type of tripping device Accessory code Application code N-pole code Rated current Residual current Relay type Installation method
NYKM3L：
Leakage Molded Case Circuit Breaker 		125A
250A
400A
800A 		M:Standard type
H:High breaking type		 Z:Manual operation
P:Electric operation
None: Direct operation		 3：3 pole
4：4 pole		 2：Electro-magnetic type
3：Thermo-magnetic type 		Refers to accessory table 2:Motor protection
None: Power distribution protection		 A:No overcurrent protection, N pole is always switched on
B:No overcurrent protection, N pole is switched on and off with other three pole
C:With overcurrent protection, N pole is switched on and off with other three pole
D:With overcurrent protection, N pole is always switched on		 16A
20A,25A
32A,40A
50A,63A
80A,100A
125A,140A
160A,180A
200A,225A
250A,315A
350A,400A
500A,630A
700A,800A		 100/300/500mA
300/500/1000mA		 Relay type
Non-relay type 		Fixed wiring at front panel.
Fixed wiring at rear panel.
Plug-in wiring at front panel.
Plug-in wiring at rear panel.
Withdrawable wiring at front panel.
Withdrawable wiring at rear panel.

Note: ●   I: Indicates that the leakage alarm module sends out a signal and the circuit breaker is tripped at the same time.
●  II: Indicates that the leakage alarm module sends out a signal and the circuit breaker is not tripped.
●  Standard inter-phase spacer

NYKM3E Series Electronic Molded Case Circuit Breaker

NYKM3E 250 M P 3 4 00 2 B 250 Installation method
Product code Casing grade Breaking capacity Operation mode Pole No. Type of tripping device Accessory code Application code N-pole code Rated current Installation method
NYKM3L：
Electronic Molded Case Circuit Breaker		 125A
250A
400A
630A
800A 		L:Basic type
M:Standard type
H:High breaking type		 Z:Manual operation
P:Electric operation
None: Direct operation		 3：3 pole
4：4 pole		 4：Electronic display Refers to accessory table 2:Motor protection
None: Power distribution protection		 A:No overcurrent protection, N pole is always switched on
B:No overcurrent protection, N pole is switched on and off with other three pole
C:With overcurrent protection, N pole is switched on and off with other three pole
D:With overcurrent protection, N pole is always switched on		 125A
250A
400A
630A
800A		 Fixed wiring at front panel.
Fixed wiring at rear panel.
Plug-in wiring at front panel.
Plug-in wiring at rear panel.
Withdrawable wiring at front panel.
Withdrawable wiring at rear panel .

Note:
●   Overload alarm non-tripping module (code 3400I, 4400I) is applicable for NYKM3E series molded case circuit breakers; 100, 225, 250, 400, 800 housing can be equipped with alarm non-tripping module.
●  Standard inter-phase spacer

Technical Parameters

NYKM2 Series Thermomagnetic Molded Case Circuit Breaker

  • Rated operating voltage Ue(V) ：AC400

    Casing current Inm(A) ：63

    Rated currentIn(A)：10,16,20,25,32,40,50,63

    Rated insulation voltage Ui(V)：AC500

    Rated impulse withstand voltage Uimp(kV)：AC8

    Number of poles ：3P/3P,4P

    Rated ultimate short -circuit breaking capacity code：L/M

    Rated ultimate short-circuit breaking capacity Icu(kA) ）：
    35/50（400V）；-（690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：
    18/25（400V）；-（690V）

  • Rated operating voltage Ue(V) ：AC400,AC690

    Casing current Inm(A) ：100

    Rated currentIn(A)：16,20,25,32,40,50,63,80,100

    Rated insulation voltage Ui(V)：AC800

    Rated impulse withstand voltage Uimp(kV)：AC8

    Number of poles ：3P/3P,4P/3P,4P

    Rated ultimate short -circuit breaking capacity code：L/M/H

    Rated ultimate short-circuit breaking capacity Icu(kA) ）：
    35/65/85（400V）；20（690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：
    22/35/50（400V）；10（690V）

  • Rated operating voltage Ue(V) ：AC400,AC690

    Casing current Inm(A) ：225

    Rated currentIn(A)：100,125,140,160,180,200,225

    Rated insulation voltage Ui(V)：AC800

    Rated impulse withstand voltage Uimp(kV)：AC8

    Number of poles ：3P/3P,4P/3P,4P

    Rated ultimate short -circuit breaking capacity code：L/M/H

    Rated ultimate short-circuit breaking capacity Icu(kA) ）：
    35/65/85（400V）；20（690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：
    22/35/50（400V）；10（690V）

  • Rated operating voltage Ue(V) ：AC400,AC690

    Casing current Inm(A) ：250

    Rated currentIn(A)：100,125,140,160,180,200,225,250

    Rated insulation voltage Ui(V)：AC1000

    Rated impulse withstand voltage Uimp(kV)：AC8

    Number of poles ：3P,4P

    Rated ultimate short-circuit breaking capacity code：L/M/H

    Rated ultimate short-circuit breaking capacity Icu(kA) ）：
    36/50/85（400V）；20（690V）

    Rated operating short-circuit breaking capacity Ics(kA)：
    27/40/65 （400V）；15（690V）

  • Rated operating voltage Ue(V)：AC400,AC690

    Casing current Inm(A) ：400

    Rated currentIn(A)：225,250,315,350,400

    Rated insulation voltage Ui(V)：AC800

    Rated impulse withstand voltage Uimp(kV)：AC8

    Number of poles ：3P,4P

    Rated ultimate short -circuit breaking capacity code：L/M/H

    Rated ultimate short-circuit breaking capacity Icu(kA) ）：
    50/65/100（400V）； 15/20/20（690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：
    35/42/65（400V）； 10/15/15（690V）

  • Rated operating voltage Ue(V) ：AC400,AC690

    Casing current Inm(A) ：630

    Rated currentIn(A)：400,500,630

    Rated insulation voltage Ui(V)：AC800

    Rated impulse withstand voltage Uimp(kV)：AC8

    Number of poles ：3P,4P

    Rated ultimate short-circuit breaking capacity code：L/M/H

    Rated ultimate short-circuit breaking capacity Icu(kA) ）：
    50/65/100（400V）； 15/20/20 （690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：
    35/42/65 （400V）；10/15/15（690V）

  • Rated operating voltage Ue(V) ：AC400,AC690

    Casing current Inm(A) ：800

    Rated currentIn(A)：630,700,800

    Rated insulation voltage Ui(V)：AC1000

    Rated impulse withstand voltage Uimp(kV)：AC8

    Number of poles ：3P,4P

    Rated ultimate short-circuit breaking capacity code：M/H

    Rated ultimate short-circuit breaking capacity Icu(kA) ）：
    75/100 （400V）；20（690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：
    65/75 （400V）；15（690V）

  • Rated operating voltage Ue(V) ：AC400,AC690

    Casing current Inm(A) ：1250

    Rated currentIn(A)：800,1000,1250

    Rated insulation voltage Ui(V)：AC800

    Rated impulse withstand voltage Uimp(kV)：AC8

    Number of poles ：3P

    Rated ultimate short-circuit breaking capacity code：-

    Rated ultimate short-circuit breaking capacity Icu(kA) ）：65(400V)；15（690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：32.5(400V)；10（690V）

NYKM2L Series Leakage Molded Case Circuit Breaker

  • Rated operating voltage Ue(V) ：AC400

    Casing current Inm(A) ：125

    Rated currentIn(A)：16,20,25,32,40,50,63,80,100,125

    Rated insulation voltage Ui(V)：AC1000

    Rated impulse withstand voltage Uimp(kV)：AC8

    Number of poles ：3P,4P

    Rated ultimate short-circuit breaking capacity code：M/H

    Rated ultimate short-circuit breaking capacity Icu(kA) ）：50/85

    Rated operating short-circuit breaking capacity Ics(kA)：35/50

    Rated residual short-circuit making (breaking) capacity I△m(kA)：1/4Icu

    Rated residual operating current I△n (mA)：100/300/500

    Rated residual non-operating current I△no：1/2I △no

  • Rated operating voltage Ue(V) ：AC400

    Casing current Inm(A) ：250

    Rated currentIn(A)：100,125,140,160,180,200,225,250

    Rated insulation voltage Ui(V)：AC1000

    Rated impulse withstand voltage Uimp(kV)：AC8

    Number of poles ：3P,4P

    Rated ultimate short-circuit breaking capacity code：M/H

    Rated ultimate short-circuit breaking capacity Icu(kA)：50/85

    Rated operating short-circuit breaking capacity Ics(kA) ：35/50

    Rated residual short-circuit making (breaking) capacity I△m(kA) ：1/4Icu

    Rated residual operating current I△n (mA)：100/300/500

    Rated residual non -operating current I△no：1/2I △no

  • Rated operating voltage Ue(V) ：AC400

    Casing current Inm(A) ：400

    Rated currentIn(A)：225,250,315,350,400

    Rated insulation voltage Ui(V)：AC1000

    Rated impulse withstand voltage Uimp(kV)：AC8

    Number of poles ：3P,4P

    Rated ultimate short -circuit breaking capacity code：M/H

    Rated ultimate short-circuit breaking capacity Icu(kA) ）：65/100

    Rated operating short-circuit breaking capacity Ics(kA) ：42/70

    Rated residual short-circuit making (breaking) capacity I△m(kA) ：1/4Icu

    Rated residual operating current I△n (mA)：100/300/500

    Rated residual non -operating current I△no：1/2I △no

  • Rated operating voltage Ue(V) ：AC400

    Casing current Inm(A) ：630

    Rated currentIn(A)：400,500,630

    Rated insulation voltage Ui(V)：AC1000

    Rated impulse withstand voltage Uimp(kV)：AC8

    Number of poles ：3P,4P

    Rated ultimate short -circuit breaking capacity code：M/H

    Rated ultimate short-circuit breaking capacity Icu(kA) ）：65/100

    Rated operating short-circuit breaking capacity Ics(kA) ：42/70

    Rated residual short-circuit making (breaking) capacity I△m(kA) ：1/4Icu

    Rated residual operating current I△n (mA)：300/500/100

    Rated residual non-operating current I△no：1/2I △no

NYKM2E Series Electronic Molded Case Circuit Breaker

  • Rated operating voltage Ue(V) ：AC400

    Casing current Inm(A) ：100

    Rated currentIn(A)：16,20,25,32/32,36,40,45,50,55,60,63/63,65,70,75,80,85,90,95,100

    Rated insulation voltage Ui(V)：AC800

    Rated impulse withstand voltage Uimp(kV)：AC8

    Number of poles ：3P,4P

    Rated ultimate short-circuit breaking capacity code：M/H

    Rated ultimate short-circuit breaking capacity Icu(kA)： 50 / 85 （400V）

    Rated operating short-circuit breaking capacity Ics(kA)： 35 / 50 （400V）

  • Rated operating voltage Ue(V) ：AC400

    Casing current Inm(A) ：225

    Rated currentIn(A)：100,125,140,160,180,200,225

    Rated insulation voltage Ui(V)：AC800

    Rated impulse withstand voltage Uimp(kV)：AC8

    Number of poles：3P,4P

    Rated ultimate short-circuit breaking capacity code：M/H

    Rated ultimate short-circuit breaking capacity Icu(kA)： 65 / 85 （400V）

    Rated operating short-circuit breaking capacity Ics(kA)： 35 / 50 （400V）

  • Rated operating voltage Ue(V) ：AC400

    Casing current Inm(A) ：250

    Rated currentIn(A)：100,125,140,160,180,200,225,250

    Rated insulation voltage Ui(V)：AC1000

    Rated impulse withstand voltage Uimp(kV)：AC8

    Number of poles ：3P,4P/3P

    Rated ultimate short-circuit breaking capacity code：M/H

    Rated ultimate short-circuit breaking capacity Icu(kA)：50 / 85 （400V）

    Rated operating short-circuit breaking capacity Ics(kA)：50 / 50 （400V）

  • Rated operating voltage Ue(V) ：AC400

    Casing current Inm(A) ：400

    Rated currentIn(A)：200,225,250,280,315,350,400

    Rated insulation voltage Ui(V)：AC800

    Rated impulse withstand voltage Uimp(kV)：AC8

    Number of poles ：3P,4P

    Rated ultimate short-circuit breaking capacity code：M/H

    Rated ultimate short-circuit breaking capacity Icu(kA)：65 / 100 （400V）

    Rated operating short-circuit breaking capacity Ics(kA)：42 / 65 （400V）

  • Rated operating voltage Ue(V) ：AC400

    Casing current Inm(A) ：800

    Rated currentIn(A)：400,420,440,460,480,500,530,560,600,630 / 630,640,660,680,700,720,740,760,780,800

    Rated insulation voltage Ui(V)：AC800

    Rated impulse withstand voltage Uimp(kV)：AC8

    Number of poles：3P,4P

    Rated ultimate short-circuit breaking capacity code：M/H

    Rated ultimate short-circuit breaking capacity Icu(kA)： 65 / 100（400V）

    Rated operating short-circuit breaking capacity Ics(kA)： 42 / 65（400V）

NYKM3 Series Thermomagnetic Molded Case Circuit Breaker

  • Rated operating voltage Ue(V) ：AC415

    Casing current Inm(A) ：63

    Rated currentIn(A)：10,16,20,25,32,40,50,63

    Rated insulation voltage Ui(V)：AC1000

    Rated impulse withstand voltage Uimp(kV)：AC8

    Number of poles ：3P,4P

    Rated ultimate short-circuit breaking capacity code：L/M

    Rated ultimate short-circuit breaking capacity Icu(kA) ：36 / 55 （415V）；12（690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：36 / 40 （415V）；10（690V）

  • Rated operating voltage Ue(V) ：AC415,AC690V

    Casing current Inm(A) ：125

    Rated currentIn(A)：16,20,25,32,40,50,63,80,100,125

    Rated insulation voltage Ui(V)：AC1000

    Rated impulse withstand voltage Uimp(kV)：AC8

    Number of poles ：3P,4P

    Rated ultimate short-circuit breaking capacity code：L/M/H

    Rated ultimate short-circuit breaking capacity Icu(kA) ：50 / 75 / 100 （415V）；20（690V）

    Rated operating short-circuit breaking capacity Ics(kA)：40 / 55 / 70 （415V）；10（690V）

  • Rated operating voltage Ue(V) ：AC415,AC690V

    Casing current Inm(A) ：250

    Rated currentIn(A)：100,125,140,160,180,200,225,250

    Rated insulation voltage Ui(V)：AC1000

    Rated impulse withstand voltage Uimp(kV)：AC12

    Number of poles ：3P,4P

    Rated ultimate short-circuit breaking capacity code：L/M/H

    Rated ultimate short-circuit breaking capacity Icu(kA) ：50 / 75 / 100 （415V）；20（690V）

    Rated operating short-circuit breaking capacity Ics(kA)：40 / 55 / 70 （415V）；10（690V）

  • Rated operating voltage Ue(V) ：AC415,AC690V

    Casing current Inm(A) ：400

    Rated currentIn(A)：225,250,315,350,400

    Rated insulation voltage Ui(V)：AC1000

    Rated impulse withstand voltage Uimp(kV)：AC12

    Number of poles：3P,4P

    Rated ultimate short-circuit breaking capacity code：L/M/H

    Rated ultimate short-circuit breaking capacity Icu(kA)：55 / 75 / 100 （415V）；20（690V）

    Rated operating short-circuit breaking capacity Ics(kA)：55 / 75 / 85 （415V）；15（690V）

  • Rated operating voltage Ue(V) ：AC415,AC690V

    Casing current Inm(A) ：630

    Rated currentIn(A)：400,500,630

    Rated insulation voltage Ui(V)：AC1000

    Rated impulse withstand voltage Uimp(kV)：AC12

    Number of poles ：3P,4P

    Rated ultimate short-circuit breaking capacity code：L/M/H

    Rated ultimate short-circuit breaking capacity Icu(kA) ：55 / 75 / 100 （415V）；20（690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：55 / 75 / 85 （415V）；15（690V）

  • Rated operating voltage Ue(V) ：AC415,AC690V

    Casing current Inm(A) ：800

    Rated currentIn(A)：630,700,800

    Rated insulation voltage Ui(V)：AC1000

    Rated impulse withstand voltage Uimp(kV)：AC12

    Number of poles ：3P,4P

    Rated ultimate short-circuit breaking capacity code：M/H

    Rated ultimate short-circuit breaking capacity Icu(kA) ： 75 / 100 （415V）;20（690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：75 / 85 （415V）;15（690V）

NYKM3L Series Leakage Molded Case Circuit Breaker

  • Rated operating voltage Ue (V)：400V

    Casing current Inm(A) ：125

    Rated currentIn(A)：16A,20A,25A,32A,40A,50A,63A,80A,100A,125A

    Selective category ：Category A

    Rated insulation voltage Ui(V)：1000V

    Rated impulse withstand voltage Uimp(kV)：8KV

    Number of poles ：3 / 4 / 3 / 4

    Rated ultimate short-circuit breaking capacity code：M / M / H / H

    Rated ultimate short-circuit breaking capacity Icu(kA)：50 / 50 / 85 / 85 （400V）

    Rated operating short-circuit breaking capacity Ics(kA)：35 / 35 / 50 / 50 （400V）

    Rated residual short-circuit making (breaking) capacity：Icu×25%

    Rated residual operating current I△n (mA)：100,300,500 （Ⅰ type）;30,100,300 （Ⅱ type）

    Rated residual non-operating current I△no：I△n×50%

  • Rated operating voltage Ue (V)：400V

    Casing current Inm(A) ：250

    Rated currentIn(A)：100A,125A,140A,160A,180A,200A,225A,250A

    Selective category ：Category A

    Rated insulation voltage Ui(V)：1000V

    Rated impulse withstand voltage Uimp(kV)：8KV

    Number of poles ：3 / 4 / 3 / 4

    Rated ultimate short-circuit breaking capacity code：M / M / H / H

    Rated ultimate short-circuit breaking capacity Icu(kA) ：50 / 50 / 85 / 85 （400V）

    Rated operating short-circuit breaking capacity Ics(kA) ：35 / 35 / 50 / 50 （400V）

    Rated residual short-circuit making (breaking) capacity：Icu×25%

    Rated residual operating current I△n (mA) ：100,300,500 （Ⅰ type）;30,100,300 （Ⅱ type）

    Rated residual non-operating current I△no ：I△n×50%

  • Rated operating voltage Ue (V)：400V

    Casing current Inm(A) ：400

    Rated currentIn(A)：225A,250A,315A,350A,400A

    Selective category ：Category A

    Rated insulation voltage Ui(V)：AC1000V

    Rated impulse withstand voltage Uimp(kV)：8KV

    Number of poles ：3 / 4 / 3 / 4

    Rated ultimate short-circuit breaking capacity code：M / M / H / H

    Rated ultimate short-circuit breaking capacity Icu(kA) ：65 / 65 / 100 / 100 （400V）

    Rated operating short-circuit breaking capacity Ics(kA) ：42 / 42 / 70 / 70 （400V）

    Rated residual short-circuit making (breaking) capacity：Icu×25%

    Rated residual operating current I△n (mA)：100,300,500 （Ⅰ type）；300,500,1000 （Ⅱ type）

    Rated residual non -operating current I△no ：I△n×50%

  • Rated operating voltage Ue (V)：400V

    Casing current Inm(A) ：800

    Rated currentIn(A)：630A,700A,800A

    Selective category ：Category A

    Rated insulation voltage Ui(V)：AC1000V

    Rated impulse withstand voltage Uimp(kV)：8KV

    Number of poles ：3 / 4 / 3 / 4

    Rated ultimate short-circuit breaking capacity code：M / M / H / H

    Rated ultimate short-circuit breaking capacity Icu(kA) ：65 / 65 / 100 / 100 （400V）

    Rated operating short-circuit breaking capacity Ics(kA) ：42 / 42 / 70 / 70 （400V）

    Rated residual short-circuit making (breaking) capacity：Icu×25%

    Rated residual operating current I△n (mA)：100,300,500 （Ⅰ type）;300,500,1000 （Ⅱ type）

    Rated residual non -operating current I△no ：I△n×50%

NYKM3E Series Electronic Molded Case Circuit Breaker

  • Rated operating voltage Ue (V)：AC415V,AC690V

    Casing current Inm(A) ：32/63/125

    Rated currentIn(A)：12,14,16,18,20,22,25,28,30,32 / 25,28,32,36,40,45,50,56,60,63 / 50,63,70,75,80,85,90,95,100,125

    Rated insulation voltage Ui(V)：AC1000V

    Rated impulse withstand voltage Uimp(kV)：AC8

    Use category ：A

    Number of poles ：3P,4P

    Rated ultimate short-circuit breaking capacity code： M / H

    Rated ultimate short-circuit breaking capacity Icu(kA) ：70 / 85 （400V）；20（690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：50 / 70 （400V）；15（690V）

  • Rated operating voltage Ue (V)：AC415V,AC690V

    Casing current Inm(A) ：160/250

    Rated currentIn(A)：63,70,75,80,90,100,125,140,150,160 / 100,112,125,140,150,160,180,200,225,250

    Rated insulation voltage Ui(V)：AC1000V

    Rated impulse withstand voltage Uimp(kV)：AC8

    Use category ：A

    Number of poles ：3P,4P

    Rated ultimate short-circuit breaking capacity code： M / H

    Rated ultimate short-circuit breaking capacity Icu(kA) ：70 / 85 （400V）；20（690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：50 / 70 （400V）；10（690V）

  • Rated operating voltage Ue (V)：AC415V,AC690V

    Casing current Inm(A) ：400

    Rated currentIn(A)：160,180,200,225,250,280,315,350,375,400

    Rated insulation voltage Ui(V)：AC1000V

    Rated impulse withstand voltage Uimp(kV)：AC8

    Use category ：B

    Number of poles ：3P,4P

    Rated ultimate short-circuit breaking capacity code： M / H

    Rated ultimate short-circuit breaking capacity Icu(kA) ：70 / 100 （400V）；20（690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：65 / 75 （400V）；15（690V）

  • Rated operating voltage Ue (V)：AC415V,AC690V

    Casing current Inm(A) ：630

    Rated currentIn(A)：250,280,315,350,375,400,450,500,560,630

    Rated insulation voltage Ui(V)：AC1000V

    Rated impulse withstand voltage Uimp(kV)：AC8

    Use category ：B

    Number of poles ：3P

    Rated ultimate short-circuit breaking capacity code： M / H

    Rated ultimate short-circuit breaking capacity Icu(kA) ：70 / 100（400V）；20（690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：65 / 75（400V）；15（690V）

  • Rated operating voltage Ue (V)：AC415V,AC690V

    Casing current Inm(A) ：630/800

    Rated currentIn(A)：250,280,315,350,375,400,450,500,560,630 / 315,350,400,450,500,560,630,700,760,800

    Rated insulation voltage Ui(V)：AC1000V

    Rated impulse withstand voltage Uimp(kV)：AC8

    Use category ：B

    Number of poles ：3P,4P

    Rated ultimate short-circuit breaking capacity code： M / H

    Rated ultimate short-circuit breaking capacity Icu(kA)：75 / 100 （400V）；20（690V）

    Rated operating short-circuit breaking capacity Ics(kA)：65 / 75 （400V）；15（690V）

Selection table


  • Product code：NYKM2：Thermo -magnetic Molded Case Circuit Breaker

    Casing grade：63A,100A,225A,250A,400A,630A,800A,1250A

    Breaking capacity：L:Basic type,M:Standard type,H:High breaking type

    Operation mode：Z:Manual operation,P:Electric operation,None: Direct operation

    Pole No.：3：3 pole,4：4 pole

    Type of tripping device：2：Electro-magnetic type ,3：Thermo-magnetic type ,0：No trip

    Accessory code：Refers to accessory table

    Application code：2:Motor protection,None: Power distribution protection

    N-pole code：A:No overcurrent protection, N pole is always switched on,B:No overcurrent protection, N pole is switched on and off with other three pole,C:With overcurrent protection, N pole is switched on and off with other three pole,D:With overcurrent protection, N pole is always switched on

    Rated current：10A,16A,20A,25A,32A,40A,50A,63A,80A,100A,125A,140A ,160A,180A,200A,225A,250A,315A,350A,400A,630A,700A,800A,1000A,1250A

    Installation method：Fixed wiring at front panel,Fixed wiring at rear panel,Plug-in wiring at front panel,Plug-in wiring at rear panel,Withdrawable wiring at front panel,Withdrawable wiring at rear panel.

•   Overload alarm non-tripping device (code 3200I,4200I) is applicable to NYKM2 series molded case circuit breaker 100, 225, 250, 400, 630 housing. However, all specifications of four-pole circuit breaker of NYKM2 series with the neutral type C and D type do not have overload alarm non-tripping function.Standard inter-phase spacer.
•  Standard inter-phase spacer.

  • Product code：NYKM2L Series Leakage Molded Case Circuit Breaker

    Casing grade：125A,250A,400A,630A

    Breaking capacity：M:Standard type, H:High breaking type

    Operation mode：Z:Manual operation,P:Electric operation,None: Direct operation

    Pole No.：3：3 pole,4：4 pole

    Type of tripping device：2：Electro-magnetic type,3：Thermo-magnetic type

    Accessory code：Refers to accessory table

    Application code：2:Motor protection,None: Power distribution protection

    N-pole code：A:No overcurrent protection, N pole is always switched on,B:No overcurrent protection, N pole is switched on and off with other three pole,C:With overcurrent protection, N pole is switched on and off with other three pole,D:With overcurrent protection, N pole is always switched on

    Rated current：16A,20A,25A,32A,40A,50A,63A,80A,100A,125A,140A,160A,180A,200A,225A,250A,315A,350A,400A,500A,630A

    Residual current ：100/300/500mA/ 300/500/1000mA

    Relay type：Relay type ,Non-relay type

    Installation method：Fixed wiring at front panel,Fixed wiring at rear panel,Plug-in wiring at front panel,Plug-in wiring at rear panel,Withdrawable wiring at front panel,Withdrawable wiring at rear panel.

•   I: Indicates that the leakage alarm module sends out a signal and the circuit breaker is tripped at the same time.
II: Indicates that the leakage alarm module sends out a signal and the circuit breaker is not tripped.
•  Standard inter-phase spacer

  • Product code：NYKM2E: Electronic Molded Case Circuit Breaker

    Casing grade：100A,225A,250A,400A,800A

    Breaking capacity：L: Basic type M:Standard type,H:High breaking type

    Operation mode：Z:Manual operation,P:Electric operation,None: Direct operation

    Pole No.：3：3 pole,4：4 pole

    Type of tripping device：4：Electronic display

    Accessory code：Refers to accessory table

    Application code：2:Motor protection,None: Power distribution protection

    N-pole code：A:No overcurrent protection, N pole is always switched on,B:No overcurrent protection, N pole is switched on and off with other three pole,C:With overcurrent protection, N pole is switched on and off with other three pole,D:With overcurrent protection, N pole is always switched on

    Rated current：32A,63A,100A,225A,250A,400A,630A,800A

    Installation method：Fixed wiring at front panel,Fixed wiring at rear panel,Plug-in wiring at front panel,Plug-in wiring at rear panel,Withdrawable wiring at front panel,Withdrawable wiring at rear panel .

•  Overload alarm non-tripping module (code 3400I, 4400I) is applicable for NYKM2E series molded case circuit breakers; 100, 225, 250, 400, 800 housing can be equipped with alarm non-tripping module.

•   Standard inter-phase spacer

  • Product code：NYKM3：Thermo-magnetic Molded Case Circuit Breaker

    Casing grade：63A,125A,250A,400A,630A,800A

    Breaking capacity：L: Basic type,M:Standard type,H:High breaking type

    Operation mode：Z:Manual operation,P:Electric operation,None: Direct operation

    Pole No.：3：3 pole,4：4 pole

    Type of tripping device：2：Electro-magnetic type,3：Thermo-magnetic type,0：No trip

    Accessory code：Refers to accessory table

    Application code：2:Motor protection,None: Power distribution protection

    N-pole code：A:No overcurrent protection, N pole is always switched on,B:No overcurrent protection, N pole is switched on and off with other three pole,C:With overcurrent protection, N pole is switched on and off with other three pole,D:With overcurrent protection, N pole is always switched on

    Rated current：10A,16A,20A,25A,32A,40A,50A,63A,80A,100A,125A,140A ,160A,180A,200A,225A,250A,315A,350A,400A,500A,630A,700A,800A

    Installation method：Fixed wiring at front panel,Fixed wiring at rear panel,Plug-in wiring at front panel,Plug-in wiring at rear panel,Withdrawable wiring at front panel,Withdrawable wiring at rear panel.

•   Overload alarm non-tripping device (code 3200I,4200I) is applicable to NYKM3 series molded case circuit breaker 100, 225, 250, 400, 630 housing. However, all specifications of four-pole circuit breaker of NYKM3 series with the neutral type C and D type do None overload alarm non-tripping function.
•  Standard inter-phase spacer.

  • Product code ：NYKM3L ：Series Leakage Molded Case Circuit Breaker

    Casing grade：125A,250A,400A,800A

    Breaking capacity ：M:Standard type, H:High breaking type

    Operation mode：Z:Manual operation,P:Electric operation,None: Direct operation

    Pole No.：3：3 pole,4：4 pole

    Type of tripping device：2：Electro-magnetic type,3：Thermo-magnetic type

    Accessory code：Refers to accessory table

    Application code：2:Motor protection,None: Power distribution protection

    N-pole code：A:No overcurrent protection, N pole is always switched on,B:No overcurrent protection, N pole is switched on and off with other three pole,C:With overcurrent protection, N pole is switched on and off with other three pole,D:With overcurrent protection, N pole is always switched on

    Rated current：16A,20A,25A,32A,40A,50A,63A,80A,100A,125A,140A,160A,180A,200A,225A,250A,315A,350A,400A,500A,630A,700A,800A

    Residual current ：100/300/ 500mA,300/500/1000mA

    Relay type：Relay type,Non-relay type

    Installation method：Fixed wiring at front panel,Fixed wiring at rear panel,Plug-in wiring at front panel,Plug-in wiring at rear panel,Withdrawable wiring at front panel,Withdrawable wiring at rear panel .

•   I: Indicates that the leakage alarm module sends out a signal and the circuit breaker is tripped at the same time.
•   II: Indicates that the leakage alarm module sends out a signal and the circuit breaker is not tripped.
•   Standard inter-phase spacer

  • Product code ：NYKM3E: Electronic Molded Case Circuit Breaker

    Casing grade：125A,250A,400A,630A,800A

    Breaking capacity ：L:Basic type,M:Standard type, H:High breaking type

    Operation mode：Z:Manual operation,P:Electric operation,None: Direct operation

    Pole No.：3：3 pole,4：4 pole

    Type of tripping device：4：Electronic display

    Accessory code：Refers to accessory table

    Application code：2:Motor protection,None: Power distribution protection

    N-pole code：A:No overcurrent protection, N pole is always switched on,B:No overcurrent protection, N pole is switched on and off with other three pole,C:With overcurrent protection, N pole is switched on and off with other three pole,D:With overcurrent protection, N pole is always switched on

    Rated current：125A,250A,400A,630A,800A

    Installation method：Fixed wiring at front panel,Fixed wiring at rear panel,Plug-in wiring at front panel,Plug-in wiring at rear panel,Withdrawable wiring at front panel,Withdrawable wiring at rear panel .

Note:•   Overload alarm non-tripping module (code 3400I, 4400I) is applicable for NYKM3E series molded case circuit breakers; 100, 225, 250, 400, 800 housing can be equipped with alarm non-tripping module.
•   Standard inter-phase spacer