Overview
The Square D B1.30 overload relay thermal unit is an essential component for motor control circuits, providing thermal overload protection in magnetic starters and motor controllers. This plug-in mounting standard thermal overload heater unit uses a melting alloy sensing method with standard trip operation and is rated for 0.88 to 1.15 Amp full load current. Designed for safe, reliable operation in industrial heating systems and motor applications, the B1.30 thermal unit helps prevent equipment overheating and potential damage.
Key Features
- Melting alloy sensing method for reliable thermal detection
- Standard trip classification for Class 20 motor protection
- Plug-in mounting for quick installation and replacement
- Full load ampere rating of 0.88 to 1.15 A
- Compact design: 4.9 in L × 3.4 in W × 0.8 in H
- Ambient temperature rating: 40°C operating standard
Technical Specifications
- Full Load Current Rating: 0.88–1.15 A
- Sensing Method: Melting Alloy
- Trip Type: Standard Trip
- Motor Tripping Class: 20
- Mounting Style: Plug-In
- Dimensions: 4.9 in L × 3.4 in W × 0.8 in H
- Ambient Temperature Rating: 40°C
- Manufacturer: Square D (Schneider Electric)
Typical Applications
- Motor starters and motor controllers
- Magnetic contactor circuits
- Industrial heating system protection
- Commercial HVAC equipment
- Machine tool motor protection
- Replacement for worn or failed thermal units in existing control systems
Compatibility & Replacements
Compatible With
- Square D Class 8536 magnetic starters
- Square D thermal overload relays (B-series)
- Schneider Electric motor control products
- Standard NEMA thermal overload relay housings with plug-in thermal units
Replaces / Drop-In Replacement For
- Original equipment Square D B1.30 units
- Direct replacement for worn or damaged B1.30 thermal elements
Works With
- NEMA-rated motor control assemblies
- Thermal overload relay selection tables per Square D/Schneider Electric specifications
- Standard electromagnetic motor starters and magnetic contactors
