Overview
The Allen-Bradley N31 is a Type N thermal overload heater element engineered for protective duty in industrial motor control circuits. Rated for 9.69–10.4 amps, the N31 delivers Class 20 overload protection and is compatible with Allen-Bradley Bulletin 700 line starters in Sizes 0, 1, and 2. This lot of 2 heater elements provides redundancy and ensures continuous uptime for critical applications. The N31 employs eutectic alloy construction, a proven thermal-sensing technology that reliably protects motors and electrical equipment against excessive current draws.
Key Features
- Current Rating: 9.69–10.4 amps, ideal for small to mid-size motor circuits
- Type N Classification: Eutectic alloy design for consistent, repeatable trip characteristics
- Class 20 Protection: Provides general-duty overload relay operation recommended for standard motor applications
- Bulletin 700 Compatibility: Direct fit for Allen-Bradley motor starters and thermal overload relays
- Lot of 2: Dual heater elements reduce downtime and maintenance intervals
Technical Specifications
- Manufacturer: Allen-Bradley (Rockwell Automation)
- Part Number: N31
- Type: Type N Heater Element
- Full Load Current Min: 9.69 amps
- Full Load Current Max: 10.4 amps
- Series: N Series
- Protection Class: Class 20 (General Purpose)
- Construction: Eutectic Alloy
- Compatible Motor Starter Sizes: 0, 1, 2
- UPC: 781180147364
- Quantity per Lot: 2 Units
Typical Applications
The Allen-Bradley N31 thermal overload heater element is suitable for:
- Three-phase induction motors in the 2–5 HP range (depending on voltage and load class)
- Magnetic motor starters with thermal overload relays in industrial automation and machine tool applications
- HVAC systems, pump motors, and compressor protection circuits
- Factory automation environments requiring Class 20 protection (standard industrial duty)
- Replacement units for worn or tripped overload relays in existing Bulletin 700 line starter installations
Compatibility & Replacements
Compatible With
- Allen-Bradley Bulletin 700 Line Motor Starters
- Thermal overload relays paired with magnetic motor starters
- Motor control circuits requiring Class 20 overload protection
- Sizes 0, 1, and 2 motor starter frames
Replaces / Drop-In Replacement For
The N31 directly replaces failed or aged N31 heater elements in existing Bulletin 700 assemblies. Verify compatibility with your specific thermal overload relay model before ordering to ensure proper seating and electrical rating alignment.
Works With
- Allen-Bradley thermal overload relays (Bulletin 700 series)
- Eutectic alloy-type overload protection systems
- Standard three-phase induction motor circuits
- Motor starters using Class 20 protection ratings
