A Comparison between MCB and MCCB


Safety procedures and equipment must always be in place before any work may be done on electrical circuits. One such precaution is installing electrical switches that operate automatically. They do a great job of warding off potential disasters caused by power surges by shielding electronics from spikes in current. Two such switches that have extensive use worldwide are miniature circuit breakers (MCBs) and moulded case circuit breakers (MCCBs). They share many of the same mechanisms but also some important distinctions.

These are the differences between MCB and MCCB.

  •         The MCB and the MCCB have different limits on the current they can handle before tripping. An MCB can handle up to 100 amperes of current, while an MCCB can take anywhere from 10 to 200 amperes.
  •         The interrupt rating, the highest current that a normally open electrical switch may block without tripping, is a key differentiator between the two.
  •         The interrupt rating of an MCCB ranges from 10,000 to 200,000 amperes, while that of an MCB is only as high as 1800 amperes. As a result, the MCCB is preferred for use with higher electrical loads and larger appliances. The MCB is more suitable for lower loads and more portable devices, especially in industrial settings.
  •         One of the most important parts of switches that operate by themselves is the tripping circuit. In the event of an aberrant operation, the circuit will be broken. The tripping circuit in an MCB is permanently installed, while with an MCCB, it can be moved.
  •         To ensure the greatest level of safety, circuit breakers have multiple “poles,” each representing a separate switching and safety phase. The MCCB can have as many as four poles, while a standard MCB has just one, two, or three.
  •         A main circuit breaker (MCB) is a safety switch that disconnects the power in the event of an electrical surge or exceptionally high voltage. When the current in a live circuit becomes too great, the device cuts power to the appliance. It can also terminate the course if it detects a short, preventing an electrical surge from damaging equipment and potentially fatal electrocution.
  •         MCCBs safeguard electrical systems against dangerously high temperatures and overload. Overloads in a circuit cause the bimetallic parts to expand and compress. The MCCB allows electricity to flow freely under normal conditions but shuts off when the temperature of the circuit becomes too high. When this happens, the MCCB’s bimetallic components shut down the current flow to protect itself from overheating.
  •         MCCBs have the advantage over MCBs in that they can be controlled from a distance via shunt wires.

Every structure’s electrical system features a circuit breaker to prevent overloads. It is important to choose the correct MCB or MCCB for your system and have only trained professionals to install them to reduce the likelihood of electrical failure.


When safeguarding your electrical devices and yourself from mishaps, MCBs and MCCB are both excellent options. The preceding comparisons help you decide which option is ideal for your needs. But only from reputable retailers like IndoAsian to ensure you get the real deal.



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