Most people are confused about the difference 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. First, we need 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 1600 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 1,600 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.

◆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 1,600 amps ceiling of the MCCB, medium or high-voltage circuit breakers would be the next best possible choices.

Summary:
1.An MCB max100 amps while an MCCB goes as high as 1600 amps.
2.MCBs breaking capacity max 6KA, MCCB up to 36KA
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.