The Trane RLY01040 Relay Coil is an electromechanical switching component designed for compatible Trane HVAC systems. Operating at 24 VAC and 50/60 Hz, it generates a magnetic field that activates the relay contacts, allowing electrical circuits to switch and control connected components. It is used in compatible furnaces, packaged rooftop units, heat pumps, and central air conditioni... https://www.partshnc.com/trane-rly01040-relay-coil-50-60hz-24-vac