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Miniature Circuit Breakers

Miniature Circuit Breakers

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Miniature circuit breakers(MCBs) are automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit. Its basic function is to interrupt current flow after a fault is detected, but unlike a fuse.

Product Description

NDM1-63 Series

The series as including: 

Trip Curve B

NDM1-63 B*1  NDM1-63 B*2  NDM1-63 B*3  NDM1-63 B*4

Trip Curve C

NDM1-63 C*1  NDM1-63 C*2  NDM1-63 C*3  NDM1-63 C*4

Trip Curve D

NDM1-63 D*1  NDM1-63 D*2  NDM1-63 D*3  NDM1-63 D*4


Technical Parameters

Rated current1A  2A  3A  4A  5A  6A  10A  16A   20A  25A  32A  40A  50A  63A
Poles1 Pole  2 Poles  3 Poles  4 Poles
Per pole frame width18mm
StandardIEC60898-1
Breaking capacity6.0kA  4.5KA ((D curve, B or C curve when current is 50A/63A)
Certification CCC  TUV  CE  RoHS


Rated Voltage

AC 230V/240V1 Pole
AC 400V2 Poles  3 Poles  4 Poles
DC 80V1Pole  2 Poles


Notes: 

- 50A and 63A products are not available for the type D curve. 

- The products breaking capacity of type B curve and type C curve with the rated current of 1-40A are 6.0kA, 50A and 63A type D curve products are 4.5kA. 

- Only one type of the protection accessories can be assembled on the right side.

- A maximum of 3 OFs or SDs can be assembled on the left side of each product, but recommended no more than 2 assembly.

- If the shunt release accessory is assembled on the right side, the residual current protection accessory or over-voltage/under-voltage accessory can't be assembled.


NDM1T-63 Series

The series as including: 

Trip Curve B

NDM1T-63 B*1  NDM1T-63 B*2  NDM1T-63 B*3  NDM1T-63 B*4

Trip Curve C

NDM1T-63 C*1  NDM1T-63 C*2  NDM1T-63 C*3  NDM1T-63 C*4

Trip Curve D

NDM1T-63 D*1  NDM1T-63 D*2  NDM1T-63 D*3  NDM1T-63 D*4


Technical Parameters

Rated current1A  2A  3A  4A  5A  6A  10A  16A   20A  25A  32A  40A  50A  63A
Poles1 Pole  2 Poles  3 Poles  4 Poles
Per pole frame width18mm
StandardIEC60947-2
Breaking capacity6.0kA
Certification CCC  TUV  CE  RoHS


Rated Voltage

AC 230V/240V1 Pole
AC 400V/415V2 Poles  3 Poles  4 Poles
DC 60V1Pole


Trip Curve Chart (NDM1-63 Series & NDM1T-63 Series)

Trip Curve BTrip Curve CTrip Curve D
b-curve-ndm1-63-ndm1-63tc-curve-ndm1-63-ndm1-63td-curve-ndm1-63-ndm1-63t


NDM1-125 Series

The series as including: 

Trip Curve C

NDM1-125 C*1  NDM1-125 C*2  NDM1-125 C*3  NDM1-125 C*4

Trip Curve D

NDM1-125 D*1  NDM1-125 D*2  NDM1-125 D*3  NDM1-125 D*4


Technical Parameters

 current50A  63A  80A  100A  125A
Poles1 Pole  2 Poles  3 Poles  4 Poles
Per pole width27mm
StandardIEC60947-2  UL1077
Breaking capacity10.0kA
Certification CCC  TUV  CE  UL1077  RoHS


Rated Voltage

AC 230V/240V1 Pole  2 Poles  3 Poles  4 Poles
AC 400V/415V1 Pole  2 Poles  3 Poles  4 Poles
DC 60V/80V1Pole
DC80V/125V
2 Poles  3 Poles  4 Poles


Trip Curve Chart (NDM1-125 Series)

Trip Curve CTrip Curve D
c-curve-ndm1-125d-curve-ndm1-125


Notes: 

- The NDM1-125 circuit breaker has an isolating function with the practical indication of the contact position.

- Only one type of protection accessories can be assembled on the right side

- A maximum of 3 OFs or SDs can be assembled on the left side of each product, and the recommended number of assembly no more than 2.

- If the shunt release accessory is assembled on the right side, the residual current protection accessory or over-voltage/under-voltage protection accessory can't be assembled.

 

NDB1-63 Series

The series as including: 

Trip Curve B

NDB1-63 B*1  NDB1-63 B*1P+N  NDB1-63 B*2  NDB1-63 B*3  NDB1-63 B*4

Trip Curve C

NDB1-63 C*1  NDB1-63 C*1P+N  NDB1-63 C*2  NDB1-63 C*3  NDB1-63 C*4

Trip Curve D

NDB1-63 D*1  NDB1-63 D*1P+N  NDB1-63 D*2  NDB1-63 D*3  NDB1-63 D*4


Technical Parameters

Rated current1A  2A  3A  4A  5A  6A  10A  16A  20A  25A  32A  40A  50A  63A
Poles1 Pole  2 Poles  3 Poles  4 Poles  1P+N  3P+N
Per pole width17.6mm
StandardIEC60898-1
Breaking capacity6.0kA
Certification CCC  TUV  CE  RoHS


Rated Voltage

AC 230V/240V1 Pole  1P+N
AC 400V/415V1 Pole  2 Poles  3 Poles  4 Poles  3P+N
DC 60V/80V1Pole  2 Poles


Trip Curve Chart (NDB1-63 Series)

Trip Curve BTrip Curve CTrip Curve D
b-curve-ndb1-63c-curve-ndb1-63d-curve-ndb1-63


NDB2-40 Series

The series as including: 

Trip Curve B

NDB2-40 B* 1P+N

Trip Curve C

NDB2-40 C* 1P+N


Technical Parameters

Rated current

2A  4A  6A  10A  16A  20A  25A  32A  40A

Poles1P+N
Per pole width18mm
StandardIEC60898-1  UL1077
Breaking capacity6.0kA
Certification CCC  TUV  CE  UL1077  RoHS


Rated Voltage

AC 230V/240V1P+N


Trip Curve Chart (NDB2-40 Series)

Trip Curve BTrip Curve C
b-curve-ndb2-40c-curve-ndb2-40


NDB2-63 Series

The series as including: 

Trip Curve B

NDB2-63 B*1  NDB2-63 B*2  NDB2-63 B*3  NDB2-63 B*4

Trip Curve C

NDB2-63 C*1  NDB2-63 C*2  NDB2-63 C*3  NDB2-63 C*4

Trip Curve D

NDB2-63 D*1  NDB2-63 D*2  NDB2-63 D*3  NDB2-63 D*4


Technical Parameters

Rated current

1A  2A  3A  4A  5A  6A  8A  10A  12A  13A  16A  20A  25A  32A  40A 50A  63A

Poles1 Pole  2 Poles  3 Poles  4 Poles
Per pole width18mm
StandardIEC60898-1  UL1077
Breaking capacity10.0kA
Certification CCC  TUV  CE  UL1077  RoHS


Rated Voltage

AC 230V/240V1 Pole
AC 400V/415V2 Poles  3 Poles  4 Poles
DC80V
1 Pole  2 Poles


Trip Curve Chart (NDB2-63 Series)

Trip Curve BTrip Curve CTrip Curve D
b-curve-ndb2-63c-curve-ndb2-63d-curve-ndb2-63

Notes: 

- NDB2-63 series has the practical indication function of the contact position. 

- Only one type of protection accessory can be assembled. 

- A maximum of 3 OF2s or SD2s can be assembled for each product. 

- If the accessory ATM is used, it shall be used together with TM2 and SD2, but TM2 can be used separately.


NDB2T-63 Series

The series as including: 

Trip Curve B

NDB2T-63 B*1  NDB2T-63 B*2  NDB2T-63 B*3  NDB2T-63 B*4

Trip Curve C

NDB2T-63 C*1  NDB2T-63 C*2  NDB2T-63 C*3  NDB2T-63 C*4

Trip Curve D

NDB2T-63 D*1  NDB2T-63 D*2  NDB2T-63 D*3  NDB2T-63 D*4


Technical Parameters (NDB2T-63 Series)

Rated current

1A  1.2A  1.5A  1.6A  2A  3A  4A  5A  6A  7A  8A  10A  12A  13A  15A  16A  20A  25A  30A  32A  40A  50A  60A  63A

Poles1 Pole  2 Poles  3 Poles  4 Poles
Per pole width18mm
StandardIEC60947-2  UL1077
Breaking capacity10.0kA
Certification CCC  TUV  CE  UL1077  RoHS


Rated Voltage (NDB2T-63 Series)

Rated current

1A  1.2A  1.5A  1.6A  2A  3A  4A  5A  6A  7A  8A  10A  12A  13A  15A  16A  20A  25A  30A  32A  40A  50A  60A  63A

Poles1 Pole  2 Poles  3 Poles  3 Poles
Per pole width18mm
StandardIEC60947-2  UL1077
Breaking capacity10.0kA
Certification CCC  TUV  CE  UL1077  RoHS


NDB2T-63 with UL489

The series as including: 

Trip Curve B

NDB2T-63 B*1  NDB2T-63 B*2  NDB2T-63 B*3

Trip Curve C

NDB2T-63 C*1  NDB2T-63 C*2  NDB2T-63 C*3

Trip Curve D

NDB2T-63 D*1  NDB2T-63 D*2  NDB2T-63 D*3


Technical Parameters (NDB2T-63 with UL489)

Rated current

1A  1.2A  1.5A  1.6A  2A  3A  4A  5A  6A  7A  8A  10A  12A  13A  15A  16A  20A  25A  30A  32A  40A  50A  60A  63A

Poles1 Pole  2 Poles  3 Poles
Per pole width18mm
StandardUL489
Breaking capacity10.0kA
Certification UL489, RoHS


Rated Voltage (NDB2T-63 with UL489)

AC AC120/277V1 Pole
AC 240V2 Poles  3 Poles
AC480Y/227V
2 Poles  3 Poles
DC 60V1 Pole  2 Poles
DC 125V
2 Poles

 

Trip Curve Chart (NDB2T-63 Series & NDB2T-63 with UL489)

Trip Curve BTrip Curve CTrip Curve D
b-curve-ndb2t-63c-curve-ndb2t-63d-curve-ndb2t-63


NDB6-125 series

The series as including: 

Trip Curve C

NDB6-125 C*1  NDB6-125 C*2  NDB6-125 C*3  NDB6-125 C*4

Trip Curve D

NDB6-125 D*1  NDB6-125 D*2  NDB6-125 D*3  NDB6-125 D*4


Technical Parameters (NDB6-125 Series)

Rated current

63A  80A  100A  125A ( Curve D )

Poles1 Pole  2 Poles  3 Poles  4 Ploes
Per pole width27mm
StandardIEC60947-2
Breaking capacity15.0kA
Certification CCC  TUV  CE  CB  RoHS


Trip Curve Chart (NDB6-125 Series)

Trip Curve CTrip Curve D
c-curve-ndb6-125d-curve-ndb6-125


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