Cutler-Hammer WMN3D40 DIN Rail Circuit Breaker

The Cutler-Hammer WMN3D40 functions as a compact three-pole miniature circuit breaker engineered for direct mounting onto standard DIN rails within industrial control assemblies and power distribution networks. Rated explicitly for 40 amperes at a maximum voltage of 415 volts, this device safeguards three-phase AC circuits from damage caused by overload or short-circuit conditions in demanding commercial environments throughout various sectors including manufacturing and facility operations. Featuring a Type D magnetic trip characteristic, the WMN3D40 accommodates high in-rush currents typical of motor-driven equipment or large solenoid coils, effectively reducing the risk of nuisance tripping during normal operation startup sequences without sacrificing sensitivity to genuine faults. This design integrates seamlessly into panel boards requiring 3-phasic isolation, allowing technicians to manage branch circuits efficiently while adhering to established electrical safety protocols for industrial machinery installations. Robust construction ensures consistent thermal magnetic response across varying operational temperatures, supporting reliable service life when installed according to standard wiring guidelines for 40 ampere rated applications.