ABB T4N200TW U Three Phase Thermal Overload Relay

ABB T4N200TW U is a 3-pole Tmax molded-case circuit breaker rated for 200 A at up to 600 V AC, built for main-circuit protection in low-voltage distribution panels and rugged industrial environments. This bolt-on frame device uses a thermal-magnetic trip mechanism with Long-Time (LI) and Instantaneous functions, and it carries a non-interchangeable trip unit for dependable, consistent protection. Wiring is handled via load-side lug terminals, and the unit is designed to support reverse-feed configurations in suitable installations. In terms of protection capabilities, the T4N200TW U delivers short-circuit ratings up to 25 kA at 480 V and 36 kA at 415 V, with a three-pole configuration that ensures balanced interruption across all phases in 3-phase systems. The T4N200TW U belongs to ABB's Tmax family of circuit breakers and is intended for use where reliable overcurrent protection is needed in modular low-voltage power distribution, compatible with ABB's range of contactors and overload relays for integrated protection schemes.