150 VA, 1-Phase, 240 x 480 Primary Volts - 120/240 Secondary Volts, NEMA 3R, Isolation Transformer, Totally Encapsulated, 50/60 Hz. HxWxD: 7.16" x 3.89" x 3.67". ***Not Reverse Feed Capable and for Use with 3-Phase Source by Connecting Primary to Any Two Wires of a 3-Phase System***