Mitsubishi HK-KT63WJWS 3-Pole Circuit Breaker 45-80A 36kA at 440V AC

The Mitsubishi HK-KT63WJWS is a 3-pole molded case circuit breaker designed for electrical distribution and circuit protection in industrial environments. It features an adjustable rated current (Ir) range of 45 to 80 amperes, providing flexible configuration to match specific load requirements across a variety of installations. The unit offers an ultimate short-circuit breaking capacity (Icu) and a service short-circuit breaking capacity (Ics) of 36 kA at 440V AC. The equal Icu and Ics values indicate full-performance breaking capability, meaning the breaker can continue to operate reliably after interrupting a fault at its maximum rated capacity. The 3-pole configuration supports three-phase AC power systems commonly used in industrial and commercial electrical installations. The HK-KT63WJWS is suitable for use in power distribution panels, motor control centers, and other applications where dependable overcurrent and short-circuit protection is essential. Its adjustable current setting allows maintenance personnel and system designers to fine-tune protection thresholds without replacing the breaker, reducing downtime and simplifying inventory management in facilities that rely on Mitsubishi electrical distribution equipment.