ABB PR221DS-LS400-1SDA058151R1 Circuit Breaker

ABB TMAX T5N 400 UL/CSA PR221DS-LS/I 400 3p fixed circuit breaker with front terminals and an AC solid-state release is rated for 400 A at 600 VAC. Catalog number 1SDA058151R1 identifies the PR221DS-LS/I variant of ABB’s Tmax T5N family, a fixed three-pole device designed for front-terminal installation in switchgear. The solid-state release in AC denotes an electronic trip unit, providing precise overcurrent protection and coordination with upstream protection schemes, while UL/CSA certification confirms compliance with North American safety standards. With a three-pole configuration, this breaker suits three-phase power distribution, feeders to transformers or generators, and protection of industrial equipment in commercial facilities. The 600 VAC service rating enables compatibility with common medium-voltage distribution circuits in many plants, and the fixed setting plus front-terminal design simplifies installation and maintenance in tight panel spaces. This ABB product belongs to the SACE Tmax/T5N lineup, known for compact form factors and robust performance in demanding environments, delivering reliable protection for essential electrical infrastructure where space, reliability, and code compliance matter most.