Overview
The Square D B4.15 thermal unit overload heater element is a Type B melting alloy heater rated for 3–3.37 amps. This lot of 3 provides essential replacement components for thermal overload relays, magnetic motor starters, and industrial motor control circuits. New in box condition ensures factory-original performance for critical motor protection applications.
Key Features
- Current rating: 3–3.37 amps
- Type B melting alloy sensing method
- Plug-in mounting design for standard thermal overload relays
- Class 20 thermal protection
- Standard trip characteristic
- Lot of 3 units included
Technical Specifications
- Current Rating: 3–3.37 amps
- Heater Type: Melting Alloy (Type B)
- Mounting Style: Plug-in
- Protection Class: Class 20
- Trip Characteristic: Standard
- Manufacturer: Square D
- Part Number: B4.15
- Quantity: 3 units per lot
Typical Applications
- Thermal overload relay protection in motor control circuits
- Replacement heater elements for Square D B Series thermal overload relays
- Magnetic motor starter heater assemblies
- Industrial AC motor protection (3–4 amp range)
- Motor control centers and distributed motor starters
Compatibility & Replacements
Compatible With
- Square D thermal overload relays (B Series)
- Square D magnetic motor starters
- Industrial motor control circuits
- Standard thermal overload relay housings with plug-in heater mounting
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. This heater element is a replacement component for Square D B Series thermal units rated 3–3.37 amps.
Works With
- Square D Class 8501 thermal overload relays
- Square D Class 8502 thermal overload relays
- Magnetic motor starters with plug-in heater mounts
- Industrial motor control centers
