Overview
The Square D B8.20 thermal overload heater element is a precision replacement component designed for thermal overload relays in NEMA motor control systems. These units feature plug-in mounting, a melting alloy sensing method, and are rated for 5.21–6.85 amps with standard trip characteristics. This lot of 10 provides cost-effective restocking for maintenance departments and integrators managing Square D motor starters across multiple machines.
Key Features
- Melting alloy thermal sensing technology for reliable overload detection
- 40°C ambient temperature rated and designed for 600 VAC operation
- Standard Trip Class 80 NEMA overload relay compatible
- Plug-in mounting for quick replacement without rewiring
- New in box condition—factory sealed for immediate deployment
- Lot of 10 units for bulk purchasing economy
Technical Specifications
Amperage Rating: 5.21–6.85 amps full load
Voltage Rating: 600 VAC
Ambient Temperature Range: –40°C rated
Sensing Method: Melting alloy
Trip Class: Standard Trip – Class 80
Mounting Style: Plug-in
Condition: New in Box
Quantity: 10 units per lot
Manufacturer: Square D (Schneider Electric)
Typical Applications
The B8.20 is used with Square D NEMA motor starters, making it essential for:
- Industrial production line motor control and protection
- Pump and compressor motor starter maintenance
- HVAC and facility automation systems
- Machine tool and conveyor system motor circuits
- Preventive maintenance stock for controls technicians
Compatibility & Replacements
Compatible With
- Square D NEMA motor starters
- Square D thermal overload relays with melting alloy design
- Square D Class 80 standard trip overload relays
- 600 VAC motor control circuits
Replaces / Drop-In Replacement For
The B8.20 is a direct replacement heater element for Square D thermal overload relays in the B-series product family. It is interchangeable with original equipment thermal units in equivalent amperage ratings. Verify your specific overload relay model number before ordering to ensure correct amperage match.
Works With
- Square D Class 8xxx and NEMA overload relay series
- All motor voltage classes up to 600 VAC
- Manual and semi-automatic motor starter controls
- Group motor control centers (GMCC)
