Potter-Brumfield W91-X112-25 Circuit Breaker

The Potter & Brumfield TE Connectivity W91-X112-25 is a hydraulic-magnetic, single-pole circuit breaker designed for panel-mount installation. Rated for 25 A at 277 VAC with a 48 VDC rating, this 1-pole device uses a lever actuator to provide magnetic (hydraulic delay) protection, which helps discriminate short-circuit events from normal inrush currents in control panels and related equipment. The W91-X112-25 is part of the Potter & Brumfield W9 family and is no longer manufactured, reflecting its status as an older, discontinued component. With its 277 VAC operating voltage and 25 A current rating, it protects circuits from overloads on AC lines while offering a DC rating for potential ancillary circuits, making it suitable for mixed-voltage installations where specified by the manufacturer. The panel-mount design and lever action facilitate straightforward installation in equipment racks or control enclosures, and the hydraulic delay characteristic provides a time-delayed response to larger faults, reducing nuisance trips in normal operation.