Overview
Allen-Bradley W67 heater element is a eutectic alloy thermal overload protection device designed for Bulletin 500 line motor starters and overload relays. The W67 provides Class 20 protection, making it ideal for general-purpose industrial motor control and automation applications.
Key Features
- Type W Eutectic Alloy Design — Reliable thermal detection with repeatable trip characteristics
- Class 20 Protection — Trips in 20 seconds or less at 600% of rated current, per NEMA standards
- Multi-Size Compatibility — Available for multiple starter sizes (1, 2, 3, 4) with different amperage ratings
- Manual Reset — Integrates with Bulletin 500 line starters and overload relay assemblies
- Industry-Standard Design — Drop-in replacement for existing 500 Line installations
Technical Specifications
- Amperage Rating (by size): Size 1 @ 37.0A, Size 2 @ 38.5A, Size 3 @ 44.0A, Size 4 @ 47.0A
- Overload Type: Eutectic Alloy Thermal
- Trip Class: Class 20 (per NEMA ICS 2-222)
- Heater Type: Type W
- Reset Type: Manual
- Bulletin: 500 Line Starters
- Weight: 0.05 lbs
- Standard: KC (North American)
Typical Applications
- Three-phase AC induction motor protection in industrial automation
- Magnetic motor starter thermal overload protection
- General-purpose motor control where Class 20 response is required
- Factories, mills, and process plants using Bulletin 500 starters
- HVAC, pump, and compressor motor control circuits
Compatibility & Replacements
Compatible With
- Allen-Bradley Bulletin 500 line starters and overload relay assemblies
- Type W heater element slots in thermal overload relays
- Manual reset thermal overload relay mechanisms
- NEMA-standard motor starter enclosures
Replaces / Drop-In Replacement For
- Previous-generation W67 heater elements in Bulletin 500 starters
- Worn or failed thermal heater elements in existing overload relays
- Verify compatibility with your specific starter model before ordering
Works With
- NEMA-rated thermal overload relay assemblies
- Class 20 motor protection schemes per NEMA ICS 2-222
- Manual starter reset circuits
- Bulletin 500 line electromagnetic contactor frames
