Difference Between B Type, C Type and D Type Circuit Breaker

Hello guys, welcome back to our blog. In this article, we will discuss the difference between B type, C type, and D type circuit breaker, what is b type circuit breaker, what is c type circuit breaker, and what is d type circuit breaker.

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B Type, C Type and D Type Circuit Breaker

First, I will discuss what the circuit breaker is. A circuit breaker is a device or equipment which can,

Make or interrupt a circuit either manually or by remote control under normal conditions.
Break a circuit automatically under fault conditions.
Make a circuit either manually or by remote control under short circuit or overload conditions.

C Type Circuit Breaker

How to identify a type c circuit breaker? If you buy 32 Amps circuit breaker from the market front side there will be printed as C 32 by seeing this you can easily identify a c-type circuit breaker.

The c-type circuit breaker has a minimum tripping current of 5 to 10 times the rated current (for example: assume the rated current of the circuit breaker as 5 amps when 25 amps current flow through the circuit breaker it will trip). Now let’s see the applications of a c-type circuit breaker, this type of circuit breaker is used for loads with a moderate inductive component that uses low-hp motors or specific types of lighting like air conditioners, residential or commercial pumps, fans, and also lighting which uses ballasts with an inductive component.

B Type Circuit Breaker

How to identify a type b circuit breaker? If you buy 32 Amps circuit breaker from the market front side there will be printed as B 32 by seeing this you can easily identify a b-type circuit breaker.

The b-type circuit breaker has a minimum tripping current of 3 to 5 times the rated current (for example: assume the rated current of the circuit breaker as 5 amps when 15 amps current flow through the circuit breaker it will trip). The b-type circuit breaker is used for purely resistive loads or loads with a very small inductive component.

The purely resistive loads are the loads that use heating elements such as the heater, toaster maker, etc. This is also used in lighting circuits (non-inductive) and also for general purpose outlets.

D Type Circuit Breaker

The d-type circuit breaker has a minimum tripping current of 10 to 20 times the rated current. This circuit breaker is used for loads with a very high inductive component, typically found in industrial settings.

This type of circuit breaker is connected with large induction motors or transformers, X-ray equipment, and welding equipment.

This was about “B Type, C Type and D Type Circuit Breaker“. I hope this article may help you all a lot. Thank you for reading.

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Chetan Shidling

Automotive | Technical Blogger | Engineer | Content Creator

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