Mitsubishi HK-KT43WWS Molded Case Circuit Breaker WS-V Series 3-Pole 20A

The Mitsubishi HK-KT43WWS is a molded case circuit breaker belonging to the WSS/WS-V series. It is built on a 100-ampere frame and rated for 480 volts AC in a three-pole configuration with a 20-ampere trip current rating. This breaker is designed to provide reliable overcurrent and short-circuit protection in electrical distribution systems. The WS-V series of molded case circuit breakers from Mitsubishi is widely used in industrial and commercial power distribution applications. The compact molded case construction of the HK-KT43WWS allows efficient installation in electrical panels, switchboards, and motor control centers. Its three-pole design makes it suitable for three-phase power circuits operating at up to 480 VAC. Typical applications include branch circuit protection in lighting panels, general-purpose distribution boards, and equipment feeder circuits. The 100-ampere frame size provides a robust enclosure while the 20-ampere trip rating is sized for lower-current branch circuits, offering precise overcurrent protection without oversizing the breaker for the connected load.