Miniature Circuit Breaker Construction and Feature
■High short-short capacity 6KA.
■Designed to protect circuit carrying big current up to 63A.
■Contact position indication.
■Used as main switch in household and similar installation.
Miniature Circuit Breaker (MCB) Technical Data
■Pole No.: 1,1P+N, 2, 3,3P+N 4P
■Rated voltage: AC 230V/400V
■Rated Current(A): 20,25,32,40,50,63
■Tripping curve: C, D
■Rated short-circuit capacity(lcn): 10000A
■Rated service short-circuit capacity(Ics): 7500A
■Rated frequency: 50/60Hz
■Rated impulse withstand voltage: 6kV
■Electro-mechanical endurance: Ins100=10000:n125=8000
■Connection terminal: Pillar terminal with clamp
■Connection capacity:
□Flexible conductor 35mm2
□Rigid conductor 50mm2
■Installation:
□On symmetrical DIN rail 35mm
□Panel mounting
■Terminali Connection Height: 20mm
Miniature Circuit Breaker Compliance
■IEC60947-2
■EN60947-2
Overall & Installation Miniature Circuit Breaker Dimensions
The tripping characteristic curves
Power Conumption
| Power Conumption | Voltage Drop (mV) | Consumption (W) |
| 20 | 141 | 2.82 |
| 25 | 88 | 2.2 |
| 32 | 84 | 2.7 |
| 40 | 105 | 4.2 |
| 50 | 70 | 3.5 |
| 63 | 83 | 5.2 |
Overload Current Protection Characteristics
| Test | Tripping Type | Test Current | Initial State | Tripping timeor Non-tripping Time Provisior | |
| a | Time-delay | 1.05In | Cold | t≤1h(In≤63A) t≤2h(ln>63A) |
No Tripping |
| b | Time-delay | 1.30In | After test a | t<1h(In≤63A) t<2h(In>63A) |
Tripping |
| c | Time-delay | 2In | Cold | 10s 20s63A) | Tripping |
| d | Instantaneous | 8ln | Cold | t≤0.2s | No Tripping |
| e | lnstantaneous | 12In | Cold | t<0.2s | Tripping |
> How to choose a good circuit breaker?
Selecting the right circuit breaker is crucial for ensuring the safety and efficiency of electrical systems. A circuit breaker serves as a protective device that int...
> What are the uses and characteristics of the isolating switch?
An isolating switch, also known as an isolation switch, is a crucial component used in electrical systems to disconnect a circuit or equipment from its power source ...
> What is a Fuse
An electrical fuse is a crucial safety component in electrical systems designed to prevent damage and maintain circuit integrity. It serves as a protective barrier t...
> What is a Circuit breaker
Circuit breaker is a crucial electrical component designed to protect electrical circuits and appliances from damage caused by excess current. It functions as a safe...