Square D A.95 Contactor Thermal Unit

Product Description

The SQUARE D A.95 is a contactor thermal unit designed as an overload relay accessory for use in motor control and protection applications. Thermal units, sometimes called heater elements, are installed inside overload relay assemblies to provide current-sensing protection calibrated to specific motor full-load amperage ratings. This unit is a direct-fit accessory component intended for licensed electricians and industrial controls technicians performing motor starter maintenance or replacement work. At 0.03 pounds, this is a compact, lightweight component sized at 2.5 inches in length, 1.2 inches in width, and 0.8 inches in height.

Thermal units are commonly used in commercial and industrial electrical systems where motor starters and contactor assemblies require properly rated overload protection. They are typically installed in magnetic motor starters within panel boards, motor control centers, or disconnect enclosures. Selecting the correct thermal unit rating is critical to ensuring the overload relay trips within the proper current range for the connected motor. This unit is intended for use in SQUARE D overload relay assemblies that accept the A.95 thermal unit designation.

Key Features

• Direct-fit thermal unit designed for SQUARE D overload relay assemblies
• Compact form factor: 2.5 inches long, 1.2 inches wide, 0.8 inches tall
• Lightweight construction at 0.03 pounds
• Single-piece package quantity for precise replacement ordering
• Functions as a current-sensing heater element within the overload relay

Compatibility

Designed as an OEM-style replacement thermal unit for SQUARE D overload relay assemblies that accept the A.95 thermal unit designator. Consult the overload relay nameplate and SQUARE D selection tables to confirm the A.95 rating is appropriate for the motor full-load amperage before installation.

Installation Notes

Thermal unit replacement should be performed by a licensed electrician in accordance with NEC requirements. Disconnect and lock out all power to the motor starter assembly before removing or installing any thermal unit. Verify the thermal unit rating against the motor nameplate full-load amps and the overload relay manufacturer selection chart before inserting the new element. Do not energize the starter until the overload relay cover or access panel is fully secured.