Overview
The Allen-Bradley W60 is a Type W thermal overload relay heating element designed for eutectic alloy-based motor protection in Rockwell Automation’s Bulletin 500 line starters. Class 20 operation provides reliable, predictable tripping behavior across a range of motor sizes. This heating element is a field-replaceable component for maintaining existing motor control circuits without major rewiring or redesign.
Key Features
- Eutectic alloy construction — proven solid-state overload sensing without mechanical trips or maintenance
- Class 20 trip curve — balanced protection against phase loss, stalls, and overloads in general industrial duty applications
- Drop-in replacement — direct fit for 500 Line and compatible NEMA starter assemblies
- Compact, lightweight design — 0.05 lbs, minimal footprint in crowded control cabinets
- Universal voltage compatibility — independent of control voltage; protects AC motors across standard industrial distributions
Technical Specifications
- Current rating (Size 00–0): 20.5 A
- Current rating (Size 1): 20.9 A
- Current rating (Size 2): 21.1 A
- Trip class: 20 (NEMA standard)
- Element type: Eutectic alloy (Type W)
- Bulletin: 500 Line starters
- Reset type: Manual
- Series: W series (W60)
- Weight: 0.05 lbs
- Condition: Used (fully functional)
Typical Applications
- AC induction motor protection in machine tool drives
- Pump and fan motor overload circuits
- Conveyor and production line motor starters
- General industrial machinery requiring Class 20 thermal protection
- Retrofit or maintenance replacement in legacy Bulletin 509 and 592 assemblies
Compatibility & Replacements
Compatible With
- Rockwell Automation Bulletin 500 line motor starters
- Allen-Bradley 500 series contactors and overload relay assemblies
- NEMA-style industrial motor control enclosures
- Manual and magnetic motor starters using Type W heating elements
- Bulletin 509 full-voltage non-reversing starters
- Bulletin 592 overload relays
Replaces / Drop-In Replacement For
- Original Allen-Bradley W60 heating elements in same starter frame
- Equivalent thermal protection elements in legacy 500 Line assemblies rated for 20–25 A
Works With
- AC power distribution (single- and three-phase, 50/60 Hz)
- NEMA contactors and disconnect switches
- Auxiliary contact blocks for signaling and diagnostics
- Standard industrial control wiring and terminal blocks
