Overview
The Allen-Bradley W56 is a eutectic alloy thermal overload heater element designed for Bulletin 500 line starters. This Type W heater element provides Class 20 protection and is rated for 14.6 amps (Size 00–0), 15.0 amps (Size 1), and 15.1 amps (Size 2). Built for reliability in industrial motor control and overload protection applications, the W56 is a standard replacement part for legacy and current automation systems using Bulletin 500 magnetic starters.
Key Features
- Eutectic alloy construction for accurate thermal response
- Type W heater element rated for Class 20 operation
- Dual amperage compatibility: 14.6–15.1 amps across NEMA sizes
- Direct replacement for Bulletin 500 line starters
- Manual reset type for controlled overload protection
- Compact, lightweight design (0.04–0.05 lbs)
Technical Specifications
- Product Type: Heater Element
- Heater Series: Type W
- Heater Technology: Eutectic Alloy
- Trip Class: Class 20
- Reset Type: Manual
- Amperage Rating Size 00–0: 14.6 A
- Amperage Rating Size 1: 15.0 A
- Amperage Rating Size 2: 15.1 A
- Application: Bulletin 500 Line Starters
- Weight: 0.04–0.05 lbs
- Manufacturer: Allen-Bradley (Rockwell Automation)
Typical Applications
- Thermal overload relay protection in motor control circuits
- NEMA magnetic motor starters and contactors
- Industrial automation control systems
- Motor branch circuit protection in manufacturing and process facilities
- Legacy Bulletin 500 motor starter installations
Compatibility & Replacements
Compatible With
- Bulletin 500 line motor starters
- Allen-Bradley thermal overload relay systems
- NEMA-rated magnetic motor starters
- Manual and automatic motor control systems
Replaces / Drop-In Replacement For
- Original equipment W56 heater elements in Bulletin 500 starters
- Legacy thermal overload protection units rated 14–15 amps
- OEM replacement for damaged or worn W-series heater elements
Works With
- Rockwell Automation motor control products
- NEMA-compliant overload relay assemblies
- Manual and magnetic motor starters
- Industrial control panels using Bulletin 500 architecture
