What is the difference between a circuit breaker and a Molded Case Circuit Breaker?

A circuit breaker and a Molded Case Circuit Breaker (MCCB) are both devices designed to protect electrical circuits from overloads and short circuits.

 A generic term that encompasses various types of devices used to protect electrical circuits. It includes a wide range of devices, from residential miniature circuit breakers (MCBs) to larger industrial circuit breakers. Circuit breakers can be of various types and constructions, including thermal, magnetic, or a combination of both.

Molded Case Circuit Breaker (MCCB): This is a specific type of circuit breaker that is housed in a molded case made of insulating material, typically a type of plastic. MCCBs are designed for higher current applications and are often used in industrial and commercial settings. They usually have adjustable trip settings and are built for more robust applications than standard residential circuit breakers.

While the term "circuit breaker" is broad and can include many types of devices, it is often used to refer to smaller residential or light commercial devices used to protect individual circuits in buildings.

 MCCBs are typically used in larger, higher voltage applications such as industrial plants, large commercial buildings, or where higher current ratings are required.

Trip Characteristics:

Depending on the type, circuit breakers may have fixed or adjustable trip characteristics. They are often designed to trip quickly in the event of a short circuit or overload to protect the wiring and equipment.

Molded Case Circuit Breaker (MCCB): MCCBs usually have adjustable trip settings, allowing for more precise protection tailored to specific applications. They may also offer additional features such as thermal and magnetic trip elements for enhanced protection.

In summary, while both circuit breakers and MCCBs serve the purpose of protecting electrical circuits from overloads and short circuits, MCCBs are a specific type of circuit breaker designed for higher current applications, housed in a molded case, and often offering adjustable trip settings for more precise protection.