Miniature Circuit Breakers (MCB)

Function of Miniature Circuit Breaker (MCB)

- Protects electrical circuits from overloads and short circuits
- Automatically disconnects the circuit when excessive current is detected
- Prevents damage to wiring and reduces fire risks

How Miniature Circuit Breaker (MCB) Works?

- Thermal Tripping Mechanism: Reacts to prolonged high currents (overloads) by heating a bimetallic strip, causing it to bend and trip the circuit
- Magnetic Tripping Mechanism: Responds instantly to sudden surges (short circuits) by activating an electromagnetic coil to trip the circuit

Types of Miniature Circuit Breaker (MCB)

- Type B: These are often used in residential properties or industrial units with small-scale operations. In such MCBs, the trip occurs when the power exceeds 5 times more than the suggested limit. These MCBs are considered to be the most sensitive owing to their lower tolerance for voltage shifts. Since current surges and fluctuations are less intense in residential spaces, it’s mostly used in such areas
- Type C: These MCBs often trip at surges that exceed 10 times the power capacity. So these are strategically used in devices that have high power consumption requirements. Often you will find Type C MCBs in commercial and industrial units. Electrical motors and fluorescent lighting are electrical accessories where Type C MCBs are used. They offer higher protection in comparison to type B MCBs and have a higher capacity to handle surges
- Type D: Considered to be the least sensitive MCB type, Type D has a surge capacity 10 to 20 times higher than the power threshold. Often these are used in devices such as X-ray machines, motors, and other equipment that have a higher rush of power. Such expensive appliances often need added protection from fluctuations in voltage and power surges, and hence these need a high capacity and robust MCB

Your Trusted Miniature Circuit Breakers (MCBs) Supplier in Singapore

ElectGo is a distributor of miniature circuit breakers (MCBs) in Singapore. We distribute MCB products from ABB, Schneider Electric, and more, ensuring reliable protection for electrical circuits in residential, commercial, and industrial applications.

Popular Range of MCB Products on ElectGo

1. ABB MCBs

2. Schneider Electric MCBs