Square D FHL-36050 Feed-Through Circuit Breaker

Square D FHL36050 is a 50-amp, 3-pole molded-case circuit breaker designed for feed-through service in commercial and industrial power-distribution systems. This through-feed unit from the Square D FHL series operates at 600 V AC and provides thermal-magnetic protection with built-in long-time and instantaneous trip functions, while using line and load lug terminals to enable direct feed-through connections. With an interrupting capacity of 25 kA at 480 V, it protects feeders feeding downstream panels against short circuits and overloads in demanding environments. The FHL36050 is designed for feed-through mounting, offering reliable phase-balanced protection across all three phases and a compact footprint suitable for panel-mounted installations, data centers, manufacturing floors, and other facilities where a subpanel or distribution block must be fed from a main line. In practice, it serves as a robust, code-conforming solution for distributing power to downstream equipment while maintaining coordinated protection with upstream circuits.