Mitsubishi HK-KT7M3WB Molded Case Circuit Breaker 3P 10A NF-S WS-V Series

The Mitsubishi HK-KT7M3WB is a three-pole molded case circuit breaker (MCCB) belonging to the WS-V series, NF-S standard class. It is designed for overcurrent and short-circuit protection in low-voltage distribution systems. The breaker has a rated current of 10 amperes and a short-circuit breaking capacity (Icu) of 5 kA at 400 VAC, tested in accordance with IEC 60947. It features a fixed thermal-magnetic trip unit that combines thermal protection for sustained overloads with instantaneous magnetic protection for short-circuit faults. Front connection is achieved via cable lugs or busbars, allowing straightforward integration into standard distribution panels. The compact molded case construction provides reliable arc containment and electrical isolation. This circuit breaker is suitable for protecting branch circuits, motor feeders and general-purpose loads in commercial and industrial electrical installations where moderate fault current levels are expected. It is a direct replacement part for Mitsubishi WS-V NF-S class switchgear assemblies.