Square D MHF36500U Molded Case Circuit Breaker With Aux Switch

Square D MHF36500U Molded Case Circuit Breaker With Aux Switch is a 500-amp molded‑case circuit breaker from Square D (Schneider Electric) designed for demanding industrial and commercial power distribution. This unit protects feeders and equipment by interrupting fault currents in distribution panels and switchboards, with the 500 A rating defining its maximum continuous load under typical conditions. It includes an integral auxiliary switch that provides a separate electrical contact for remote status signaling or interlock logic when the breaker trips or is reset, supporting automation, monitoring, and safety interlock scenarios in control cabinets. The MHF36500U model designation identifies this exact unit within Square D’s legacy MCCB family, offering a robust solution for reliable overcurrent protection while enabling convenient status feedback through the auxiliary contact. In applications, such a breaker is used to protect heavy-duty feeders and to integrate with control systems that require real-time indication of breaker state, helping simplify panel wiring and improve system visibility. Ensure installation aligns with the breaker's form factor and accessory compatibility within the Square D ecosystem and complies with all applicable electrical codes and panel manufacturer guidelines for safe, compliant operation.