ABB ST202M-B7 Safety Relay Module for Industrial Control Systems

ABB ST202M-B7 is a two-pole miniature circuit breaker from ABB's System pro M compact family, designed to protect control circuits in industrial equipment. It is rated for 7 A and 480Y/277 V, with a UL 1077-listed 10 kA interrupting capacity and a B-curve (type B) tripping characteristic. This compact 2-pole device provides overcurrent protection for two conductors in control-supply circuits, making it suitable for panel-mounted installations in automation and machine-control applications. Typical applications include safeguarding power feeds to relays, sensors, actuators, and other control circuitry in industrial machines, automation panels, and robotic systems, where predictable, fast response to overcurrents is required while maintaining selectivity with other protective devices. The ST202M-B7 is part of ABB’s System pro M compact portfolio, a common choice for control-panel protection in North American and international facilities.