Square D A2.31 Contactor Thermal Unit

Product Description

The SQUARE D A2.31 is a thermal unit designed as an accessory for use with compatible contactors in industrial and commercial electrical control systems. Thermal units provide overload protection by responding to heat generated under excess current conditions, helping protect motor loads and associated equipment from damage. Licensed electricians and industrial maintenance technicians install this component as part of a starter or contactor assembly. The A2.31 weighs 0.04 pounds and measures 2.5 inches in length, 1.2 inches in width, and 0.8 inches in height, making it a compact replacement element for the appropriate contactor lineup.

This thermal unit is suited for replacement service in commercial and industrial motor control applications where contactor overload protection is required. It is typically installed inside a motor starter assembly as part of routine maintenance or when replacing a damaged overload element. The package contains one unit, allowing single-unit replacement without unnecessary excess stock.

Key Features

• Provides thermal overload protection for contactor and motor starter assemblies
• Compact form factor: 2.5 inches long, 1.2 inches wide, 0.8 inches tall
• Lightweight at 0.04 pounds for easy handling during installation
• Single-unit packaging supports precise, as-needed replacement
• Designed as a contactor accessory for direct integration into compatible assemblies

Compatibility

Designed as an OEM-style replacement thermal unit for compatible SQUARE D contactor and motor starter assemblies requiring this accessory type.

Installation Notes

Installation should be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and any applicable local codes. Always de-energize and lock out the panel or control circuit before removing or inserting a thermal unit into the contactor assembly. Verify the thermal unit seates fully and securely in the overload relay block before restoring power. Do not attempt to modify or substitute thermal units rated for different applications.