Overview
The Allen-Bradley W65 is a precision heating element engineered for thermal overload relay applications in industrial motor control systems. As an eutectic alloy type heater element, it delivers accurate temperature sensing and fast trip response to protect motors from dangerous overload conditions. This component is purpose-built for Bulletin 500 line starters and similar NEMA motor control architectures where reliable, predictable overload protection is essential.
Key Features
- Eutectic alloy construction for precise thermal response and repeatable trip characteristics
- Class 20 trip classification for reliable motor protection across industrial duty cycles
- Current rating range of 31–39.5 amps covering multiple motor sizes
- Direct compatibility with Bulletin 500 magnetic starters and NEMA motor control systems
- Manual reset design for controlled restart after protection activation
- New in Box condition; authentic Allen-Bradley OEM part
Technical Specifications
- Heater Element Type: Eutectic Alloy
- Series: W Series, Type W
- Current Rating: 31–39.5 Amps (size-dependent)
- Trip Class: 20
- Application: Thermal Overload Relays, Bulletin 500 Line Starters
- Reset Type: Manual
- Weight: 0.05 lbs
- Standard Compliance: NEMA, KC
Typical Applications
- AC induction motor overload protection in manufacturing and process control
- HVAC and pumping system motor starters requiring automatic thermal cutoff
- Industrial machinery with Bulletin 500 or legacy NEMA motor control cabinets
- Retrofit and maintenance replacements in existing motor starter assemblies
- Food processing, textile, automotive, and general industrial automation environments
Compatibility & Replacements
Compatible With
- Bulletin 500 line motor starters
- NEMA-rated magnetic motor control centers
- Allen-Bradley thermal overload relay assemblies
- Standard industrial motor protection circuits (AC 3-phase and single-phase)
Replaces / Drop-In Replacement For
- Original equipment W65 heating elements in existing Bulletin 500 starters
- Legacy thermal overload heater units rated for 31–39.5 amp protection
- Verify compatibility with your specific relay housing and amperage class before ordering
Works With
- Class 20 thermal overload relay mechanisms
- Manual reset overload relay bases
- NEMA-compliant motor control systems
- Standard industrial AC motor control circuits
