ABB PR221DS Circuit Breaker

ABB Tmax T5S 600 three-pole molded-case circuit breaker with PR221DS electronic release is a high-current protection device for industrial power distribution. Rated In 600 A, it accommodates conductors from 500 to 250 kcmil, enabling large-diameter wiring for heavy-duty feeders. As part of ABB’s Tmax T family, this MCCB combines a rugged molded-case housing with an electronic trip unit (PR221DS) to provide precise overcurrent protection for three-phase circuits. The unit is designed for use in electrical panels and motor-control environments where large conductor sizes and dependable short-circuit and overload protection are essential. The PR221DS release integrates with the three-pole breaker to enable coordinated protection and reliable operation in demanding industrial applications.