Overview
The Allen-Bradley N31 thermal overload relay heater element is a eutectic alloy-type heater designed to protect motors and machinery in industrial automation applications. As part of the Allen-Bradley Type N series, the N31 provides Class 20 overload protection and precise current sensing for three-phase and single-phase motor circuits. This heater element is new in box and ready for immediate deployment in replacement or troubleshooting scenarios.
Key Features
- Type N eutectic alloy heater element for reliable thermal protection
- Designed for full load current range of 9.69–10.4 amperes
- Class 20 overload protection per NEMA ICS 2-222 standards
- Compact, industry-standard form factor for seamless integration
- New in box condition ensures product integrity
- Direct replacement for compatible Allen-Bradley overload relays
Technical Specifications
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Part Number | N31 |
| Heater Type | Type N (Eutectic Alloy) |
| Full Load Amperes (Min) | 9.69 A |
| Full Load Amperes (Max) | 10.40 A |
| Overload Class | Class 20 |
| Series | N Series |
| Condition | New in Box |
| UPC | 781180147364 |
Typical Applications
The Allen-Bradley N31 heater element is suitable for:
- General-purpose three-phase squirrel-cage motor protection
- Machinery control circuits requiring Class 20 overload relays
- Industrial conveyor systems and pump applications
- Machine tool automation and assembly line protection
- HVAC and industrial refrigeration motor control
- Any system using Allen-Bradley Bulletin 100, 500, or compatible starters
Compatibility & Replacements
Compatible With
- Allen-Bradley Bulletin 100 and 500 Line starters
- Allen-Bradley overload relays with Type N heater element sockets
- NEMA-compliant motor control centers and disconnect switches
- Three-phase and single-phase motor circuits (where applicable)
- Industrial automation systems requiring Class 20 thermal protection
Replaces / Drop-In Replacement For
- Original equipment N31 heater elements
- Other N-series heaters in the same amperage range (when properly sized)
- Legacy overload relay heater cartridges in comparable applications
Works With
- Allen-Bradley motor control and automation platforms
- NEMA-rated overload relay assemblies
- Manual and magnetic motor starters
- Industrial electrical distribution systems
