Miniature Circuit Breaker | What is MCB?

MCB is an abbreviation of "Miniature Circuit Breaker".Miniature circuit breaker (MCB) is a small electrical protection device, mainly used to protect the circuit from overload and short circuit.

Here are some key features about MCB.

1.Low Rated Current

The MCB's rated current  is usually below 100A and is suitable for low-current application scenarios, such as residential, commercial buildings and small industrial facilities.

2.Automatic Reset Function

The MCB will automatically disconnect the circuit in case of overload or short circuit, and can be manually or automatically reset after the fault is removed, so as to restore the normal operation of the circuit.

3.Quick Response

It is designed to detect faults in a short time and quickly disconnect the circuit, preventing damage to electrical equipment and wiring.

4.Compact Design

Small size, easy to install, suitable for use in the power distribution board and control cabinet.

5.Multiple Trip Curves

MCB provides different types of trip curves (such as B, C, D) to adapt to different types of load and protection requirements.

B-curve: Suitable for general lighting and socket circuits.

C-curve: Suitable for inductive loads such as motors and transformers.

D-curve: Suitable for high starting current loads, such as large motors and inverters.

6.Application

MCB is widely used in residential, commercial buildings, light industry and other places requiring circuit protection.

MCB plays an important role in modern electrical systems, providing reliable overload and short circuit protection to ensure electrical equipment and personal safety.

Miniature circuit breakers(MCBs)are widely used in power distribution systems in residential and commercial buildings. In the home environment, MCBS are used to protect lighting circuits, outlet circuits and household appliances from overload and short circuits.

They are usually installed in the power distribution board, each MCB corresponds to a specific circuit, such as the circuit in the kitchen, living room or bedroom, when the current in the circuit exceeds the safe limit, the MCB will automatically disconnect the power, preventing electrical fires and equipment damage.

In commercial buildings, MCBS are also used to protect lighting systems, outlet circuits, air conditioning equipment, and other electrical facilities. In addition, they are widely used in power distribution systems in small industrial facilities and offices to ensure the safe operation of various electrical equipment.

Because MCBS have the characteristics of small size, easy installation and fast response, they are an indispensable part of the electrical protection system of modern buildings, providing reliable circuit protection and easy maintenance.