Square D HDP36125 Three Phase Circuit Breaker

Square D's PowerPact H series HDP36125 is a 3-pole molded-case circuit breaker rated for 125 A and up to 600 V AC, designed for unit-mount installation in power distribution. It provides thermal-magnetic protection with a 14 kA short-circuit interrupting capacity at 600 VAC, and features load-side lug terminals for straightforward wiring within the PowerPact H frame. This device is intended to protect three-phase feeders in commercial and light industrial panels and switchgear, delivering reliable overload and short-circuit protection for circuits up to 125 A. Built to fit Square D enclosures that accept H-series breakers, the HDP36125 combines compact form with proven protection performance for three-phase distribution, ensuring balanced tripping across all phases and compatibility with standard electrical installation practices.