872-043

This high-performance step-down transformer is a vital electrical component designed to convert standard 120V residential line voltage into the 24V power required by low-voltage control circuits. Ideal for furnace and HVAC system repairs, this 40VA transformer provides a reliable power source for thermostats, control boards, ignition modules, and gas valves. If your heating or cooling system fails to trigger or the control board lacks power, this replacement transformer ensures stable voltage delivery and protects sensitive electronics from fluctuations. Built for durability and long-term efficiency, it is a standard solution for maintaining the electrical integrity of residential climate control equipment.
Type: Electrical Transformer
Size: Standard Frame
Application: Used in residential forced-air furnaces, air handlers, and HVAC systems to power low-voltage control circuits, thermostats, and relays.
Specifications: Primary Voltage: 120V AC; Secondary Voltage: 24V AC; Power Rating: 40VA; Frequency: 50/60Hz; Configuration: Step-down transformer.