SQUARE D Thermal Unit A.78, Trip Class 20

The SQUARE D Thermal Unit A.78 is an overload protection device for motor starters. It protects motors from overheating by tripping the circuit when current exceeds a safe level. Common in industrial automation, HVAC, and pump systems, it ensures equipment longevity and safety in continuous-duty applications.

The SQUARE D Thermal Unit A.78 has a trip class of 20 and a manufacturer part number A.78. It is designed for use with SQUARE D motor starters and overload relays. The unit provides precise thermal protection based on motor current and ambient temperature, ensuring reliable operation in industrial environments.

You can source the SQUARE D Thermal Unit A.78 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine SQUARE D components for your motor protection needs.

Select the SQUARE D Thermal Unit by matching the motor full-load current (FLC) to the unit's trip range. The A.78 is a 20 trip class unit, suitable for standard motor starting. Consult the motor nameplate and SQUARE D selection tables to ensure proper overload protection. Always verify ambient temperature compensation for accurate performance.