Marcus, MO350K, Open Transformers, 240 / 480 V Primary, 12/24 V Secondary, 350 VA Power, 60 Hz Frequency, 1 ph, 130 deg C Insulation, 80 deg C, 4.50x5.20x3.75 in Dimensions. CSA Certified & UL Listed Specifications Dimensions 4.50 x 5.20 x 3.75 in Frequency Rating 60 Hz Insulation 130 deg C Phase 1 Power Rating 350 VA Primary Voltage 240 / 480 V Secondary Voltage 12/24 V Temperature Rating 80 deg C