MCCB Supplier & Manufacturer

An MCCB is used to protect low-voltage circuits from overload and short circuit, and to provide manual switching for maintenance isolation. It also supports protection coordination in distribution design.

An MCCB is designed for higher rated currents and breaking capacities than an MCB, and typically offers accessible or replaceable trip units with adjustable settings, making it suitable for main and sub-main distribution circuits.

Selection typically starts with rated current, breaking capacity (Icu and Ics), number of poles, and trip characteristics, matched to the load circuit, fault level, and surrounding protection devices.

MCCBs are commonly installed in distribution boards, sub-distribution panels, incoming supply panels, and industrial control panels where circuit protection and manual isolation are required.

An electronic trip MCCB is specified when adjustable protection settings, finer selectivity, and documentation-oriented coordination are required for larger or multi-stage distribution systems.