Honeywell Transformer, General Purpose, 120 VAC Primary, 27 VAC Secondary, 40 VA, 60 Hz, Universal Mount, 9 inch Lead Wires Primary, (2) Screw Terminals Secondary, -20 to 105 degree Fahrenheit, 3-3/16 inch height x 2-3/8 inch Width x 3-1/8 inch D
Honeywell 40 VA general purpose transformers power 24VAC circuits.