Eaton Cutler-Hammer WMS3D04 Molded Case Circuit Breaker

Eaton Cutler-Hammer WMS3D04 molded case circuit breaker is a 3-pole device rated for 4 A at 415 V. As a molded case circuit breaker (MCCB), it provides overload and short-circuit protection for three-phase distribution circuits and is intended for installation in low-voltage panels. The WMS3D04 designation specifies this particular 3P, 4A frame within Eaton's Cutler-Hammer line, making it a suitable choice for protecting branch circuits in commercial or light industrial settings that use 415 V three-phase power. With a three-pole configuration, it ensures simultaneous disconnection of all phases in the protected circuit, contributing to safer shutdown during fault conditions. Use cases include motor control centers, control panels, and distribution boards where compact, low-current protection at 415 V is required. The 4 A rating is appropriate for protecting smaller branch circuits or devices drawing limited current within a 3-phase 415 V installation. Being a molded case design, it encloses the current path in a durable housing, helping prevent contact with live parts.