Cutler-Hammer WMN1D40 Miniature Circuit Breaker

Cutler-Hammer WMN1D40 miniature circuit breaker is a 40-amp, single-pole protective device designed for overcurrent protection in electrical circuits. Rated for 240 to 415 VAC, it is engineered for use in DIN-rail-mounted enclosures, enabling compact, plug-in integration in distribution panels. The WMN1D40 interrupts current quickly when overload or short-circuit conditions occur, helping safeguard wiring and equipment while maintaining reliability in protected circuits. This unit's 40 A rating defines the maximum continuous operating current for the protected circuit under normal conditions, while its single-pole design protects one conductor in the circuit. The DIN-compatible form factor supports standard modular panel layouts, delivering straightforward replacement or upgrade in compatible assemblies without altering surrounding hardware.