Square D A1.54 Thermal Unit

Product Description

The Square D A1.54 thermal unit is designed to protect motors, controllers, and branch circuit conductors. It prevents overheating caused by prolonged motor overcurrents, including locked rotor currents. The unit operates under Class 20 specifications, responding to overloads within twenty seconds. These thermal units feature a one-piece construction that ensures reliability. Inside, motor current flows through a heater winding. Under overload situations, a special solder melts, allowing a ratchet wheel to release, thereby disconnecting the control circuit contacts and stopping motor operation.

• Protects against excessive heating in motors.
• Tripping occurs in twenty seconds or less during overloads.
• Constructed to ensure durability and reliability.

Product Highlights

The thermal unit effectively safeguards branch circuit components from high currents due to short circuits or grounds.

Product Information

Standard Information

• Catalog Number: A1.54
• Brand: Square D

Technical Specifications

• Type: Thermal - Melting Alloy Thermal Unit
• Trip Type: Standard Trip - Class 20
• Reset Type: Manual
• Applications: For use in melting alloy thermal overload relays
• Warranty Length: 18 months
• Country of Origin: Mexico
• UPC: 785901585213
• GTIN: 00785901585213