Square D A.49 Thermal Unit

Product Description

The Square D A.49 Thermal Unit is a critical component for protecting motors, controllers, and branch circuit conductors. It prevents overheating caused by prolonged motor overcurrents, including locked rotor currents. This unit integrates a heating element and responds to overload conditions as per standardized trip curves. The A.49 unit is designed to trip in twenty seconds or less during overload scenarios. The design features a one-piece construction where the current flows through a heater winding, melting solder under heat to disengage the control circuit contacts effectively.

• Protects against overheating of motors and controllers
• Class 20 rating for reliable trip performance
• One-piece construction for enhanced durability

Product Highlights

This thermal unit is essential for ensuring the longevity of motors and prevents potential circuit damage by cutting power during overload conditions.

Product Information

Standard Information

• Catalog Number: A.49
• Brand: Square D

Technical Specifications

• Type: Thermal - Melting Alloy Thermal Unit
• Trip Type: Standard Trip - Class 20
• Reset Type: Manual
• Warranty Length: Eighteen months
• Country of Origin: United States
• UPC: 785901585091
• GTIN: 00785901585091
• Applications: For use in melting alloy thermal overload relays