Cutler-Hammer SPHM3YL07R5 Hydraulic Magnetic Circuit Breaker

The Cutler-Hammer SPHM3YL07R5 hydraulic-magnetic circuit breaker is a three-pole protective device rated at 7.5 amperes for 277/480-volt electrical systems, designed to install in commercial and industrial panels to protect three-phase feeders and associated equipment from overcurrent conditions. This 3P unit interrupts fault currents in service scenarios rated for 277/480 V, delivering defined trip behavior for three-phase circuits and helping to prevent insulation damage and equipment wear in power distribution systems. The SPHM3YL07R5 designation identifies this hydraulic-magnetic model from Cutler-Hammer, confirming its 3-pole configuration, 7.5 A current rating, and 277/480 V operating configuration, which is essential for proper matching to a panel's voltage and load. Use cases include protecting three-phase feeders in commercial and light industrial electrical panels where reliable, fixed-current protection at 480 V nominal is required.