Eaton WMS3B60 DIN-rail Mounted Protective Device

Description:

The Eaton WMS3B60 Supplementary Protector is used in industrial control systems to provide overcurrent protection for low-power electrical circuits and equipment. It is a UL 1077 recognized DIN-rail mounted protective device designed to safeguard control transformers, relays, PLC I/O, and auxiliary circuits from overload and short-circuit conditions. Commonly installed in control panels, automation cabinets, and industrial electrical distribution systems where supplementary circuit protection is required alongside main branch protection. Maintenance teams, OEM panel builders, and system integrators use this device for protection upgrades, panel assembly, and replacement of legacy fuse-based protection systems.

Applications:

The Eaton WMS3B60 is used in industrial electrical panels to protect sensitive control and instrumentation circuits from overloads and short-circuit faults. It is commonly applied in PLC systems, control power transformers, relay circuits, lighting control panels, and industrial automation equipment where resettable protection is preferred over fuses.

Technical Specifications:

• Manufacturer: Eaton / Cutler-Hammer
• Model / Part number: WMS3B60
• Product type: Supplementary protector (miniature circuit breaker)
• Series: WMS UL 1077
• Number of poles: 3-pole
• Current rating: 60 A
• Voltage rating: Up to 480–600 V AC (application dependent) ([])
• Trip curve: B curve (3–5× In magnetic trip range) ([])
• Mounting: 35 mm DIN rail mount
• Function: Overcurrent and short-circuit protection for control circuits
• Standard compliance: UL 1077, CSA, IEC 60947-2 class supplementary protection ([])
• Application environment: Industrial control panels and automation systems
• Operation type: Thermal-magnetic resettable breaker

Common Replacements:

• Eaton WMS3C60 supplementary protector (C-curve variant equivalent)
• Schneider Electric Acti9 iC60N 3P 60A miniature circuit breaker
• Siemens 5SY63 3-pole 60A DIN rail circuit breaker