Overview
The Allen-Bradley W80 overload heater is a eutectic alloy thermal heater element used in Bulletin 500-series magnetic motor starters and thermal overload relays. Rated at 118 amps, this Type W heater element delivers Class 20 operation for general applications.
Key Features
- Current rating: 118 amperes maximum
- Eutectic alloy construction with Class 20 trip characteristics
- Type W heater element design for thermal overload protection
- Compatible with Bulletin 500-series motor starters
- Compact drop-in replacement for existing overload relay blocks
- Reliable motor circuit protection across ambient temperature ranges
Technical Specifications
Designed for use in thermal overload relays, magnetic motor starters, and motor control equipment. The W80 operates across standard industrial ambient conditions and integrates directly into existing starter assemblies without modification.
Typical Applications
- General-purpose AC squirrel-cage induction motors
- Magnetic motor starter overload protection blocks
- Thermal overload relay assemblies in Bulletin 500 control systems
- Industrial motor circuits requiring Class 20 trip performance
- OEM equipment and replacement maintenance on existing starters
Compatibility & Replacements
Compatible With
- Allen-Bradley Bulletin 500-series magnetic motor starters
- Type W thermal overload relay blocks
- Standard 3-phase AC induction motor applications
- Class 20 overload relay specifications (NEMA ICS 2-222)
Replaces / Drop-In Replacement For
The W80 directly replaces existing W80 heater elements in thermal overload relay assemblies. For specific application compatibility, verify the motor full-load amperage against Allen-Bradley heater selection tables to confirm proper element sizing.
Works With
- Allen-Bradley magnetic motor starters and contactors
- Overload relay blocks (Bulletin 500 series)
- Standard AC motor circuits
- Industrial control systems using thermal protection methods
