There are significant differences between MCCB (molded case circuit breaker) and MCB (miniature circuit breaker), which are mainly reflected in the application, rated current, interruption rating, tripping function and cost.
1. Application
MCCB: Mainly used in high-power applications, such as industrial or large commercial applications. Its shell is made of plastic or polymer materials, with good insulation and corrosion resistance, and can operate stably in harsh environments.
MCB: Mainly used in low-power applications, such as home or small distribution boards. It is small and light, and can quickly cut off the circuit to prevent overload or short circuit.
2. Rated current
MCCB: The rated current range is large, usually up to 2500A or even higher. This allows MCCB to be used in larger electrical systems and higher current loads.
MCB: The rated current range is small, usually not more than 100A. It is more suitable for small electrical systems and lower current loads.
3. Interruption rating
MCCB: The interruption rating is high, up to 200000A. This means that in extreme cases, MCCB can withstand higher short-circuit currents without damaging itself.
MCB: Although the interruption rating is also higher, it usually does not exceed 18000A. Despite this, it is still able to meet the needs of most small electrical systems.
IV. Tripping function
MCCB: It has an adjustable tripping function. Users can set tripping parameters such as continuous current, long delay, short time pickup, short delay, instantaneous pickup, and ground fault pickup as needed. This provides greater flexibility in designing circuits.
MCB: It does not have an adjustable tripping function. Its tripping parameters are fixed and cannot be adjusted according to user needs.
V. Cost
MCCB: Due to its higher rated current, larger interruption rating, and adjustable tripping function, the cost of MCCB is usually higher.
MCB: The cost is relatively low. It is suitable for small electrical systems and lower current loads, so the price is more affordable.