What is an MCB?
MCB stands for Miniature Circuit Breaker
An MCB is an automatic electrical switch used to protect an electrical circuit from damage caused by overload or short circuit.
When excess current flows, it automatically trips (turns off) the circuit to prevent hazards like fire or equipment damage.
Key Points:
Safety device – protects wiring and appliances
Works automatically – no need to replace like a fuse
Reusable – can be reset after tripping
Commonly used in homes, offices, and industries
Simple Example:
If you connect too many appliances to one socket and the current exceeds the limit, the MCB will trip and cut off the power, preventing overheating or fire.
If you want, I can also explain how it works internally or compare it with a fuse.