Difference Between Similar Terms and Objects

Difference Between MCB and MCCB


Most people are confused about the differences between MCB and MCCB. Although both are circuit breakers, there are actually key differences between the two that makes them specially made for specific jobs.

However, before we talk about the key features of each, it is important to understand what the abbreviation stands for. “MCB” stands for “Miniature Circuit Breakers” while “MCCB” is “Molded Case Circuit Breaker.”

The main difference between the two is their capacity with the MCB rated under 100 amps with an interrupting rating of under 18,000 amps. Consequently, their trip characteristics may not be adjusted since they basically cater to low circuits.

On the other hand, an MCCB comes with an adjustable trip characteristic for the higher models. Usually, this type of circuit breaker would provide amps as high as 2,500 or as low as 10 depending on what is necessary. Their interrupting rating can be around 10,000 amps to 200,000 amps.

Judging from their power capacities, the MCB is mainly used for low-energy requirements like home wiring or small electronic circuits. On the other hand, the MCCB is more suited in providing energy for high-power equipment.

Although an MCCB has a higher capacity than an MCB, both are classified under low voltage circuit breakers and should, therefore, respond to standards set by the IEC 947. For convenience’s sake, some MCCB units have electrical motor operators which means that they can be tripped using only a remote control. For industrial or commercial use, they may be utilized as standby power that runs on an automatic transfer switch.

Both are installed in special niches on the wall that would make it easy to install or uninstall without interrupting the whole system or damaging the switchgear. Both are specially made to handle direct current and are usually laid out in tiers for space efficiency.

Circuit breakers are usually reset after they have been “tripped.” Both MCB and MCCB are highly durable and could last for years depending on the manufacturer.

When choosing between using an MCB and an MCCB, it is important to consider the amount of power that would be coursing through the device. As mentioned above, MCCB is more suited for higher energy because of its better capacity. Of course, when it comes to home use, the MCB is usually the circuit breaker of choice. For heavier power requirements that go beyond the 2,500 amps ceiling of the MCCB, medium or high-voltage circuit breakers would be the next best possible choices.

Circuit breakers are installed in any structure that requires power for safety reasons. They are made to ensure that fire hazards or electrical problems would not occur in a home by cutting of electricity flow. This is usually done when the system experiences a “short circuit” or an “overload.”

For this reason, an MCB or MCCB should both be installed by professionals. This would minimize the chance of problems throughout use. At the same time, choosing the right MCB or MCCB brand to install in a building is necessary as some brands are actually better than others. Ideally, the location of circuit breakers should provide easy access and known to all the individuals residing in a building.


1.An MCB has less than 100 amps while an MCCB goes as high as 2,500 amps.

2.The interrupting rating for an MCB is 18,000 amps up to 200,000 amps for an MCCB.

3.MCBs are mostly installed for home use while an MCCB is generally utilized for commercial or industrial purposes.

4.Both are low-voltage circuit breakers created to respond to IEC 947 standards.

5.Some MCCB units are specially made to respond to remote control signals usually as standby power.

6.Circuit breakers are installed for safety reasons.

7.The location of circuit breakers in every structure should be known to the people who reside in it.

Search DifferenceBetween.net :

Custom Search

Help us improve. Rate this post! 1 Star2 Stars3 Stars4 Stars5 Stars (3 votes, average: 5.00 out of 5)

Email This Post Email This Post : If you like this article or our site. Please spread the word. Share it with your friends/family.


  1. What is ACB

  2. is it true?? MCB and mccb are same.

Leave a Response

Please note: comment moderation is enabled and may delay your comment. There is no need to resubmit your comment.

Articles on DifferenceBetween.net are general information, and are not intended to substitute for professional advice. The information is "AS IS", "WITH ALL FAULTS". User assumes all risk of use, damage, or injury. You agree that we have no liability for any damages.

See more about :
Protected by Copyscape Plagiarism Finder