Mitsubishi HK-KT7M3BG1-1-5 4-Pole Circuit Breaker 125-160A

The Mitsubishi HK-KT7M3BG1-1-5 is a four-pole molded-case circuit breaker designed for AC power distribution and equipment protection. It features an adjustable rated current range of 125 to 160 amperes, allowing it to be set to match the specific load requirements of the protected circuit. The breaker offers an ultimate and service short-circuit breaking capacity (Icu and Ics) of 50 kA at 440 V AC, providing robust fault-current interruption capability in demanding industrial environments. With its four-pole configuration, the HK-KT7M3BG1-1-5 can simultaneously break all three phases and the neutral conductor, making it well suited for three-phase systems where neutral switching is required. Typical applications include main distribution panels, motor feeder circuits, and branch-circuit protection in factory automation, machine tool, and building infrastructure installations. The breaker is designed for straightforward panel mounting and is compatible with standard Mitsubishi accessories such as auxiliary contacts, shunt trip coils, and undervoltage releases, enabling flexible integration into switchgear assemblies.