T2428100C - AC Power Supply with Gray Enclosure Specifications: Input: 115VAC 50/60Hz, .95 amp. Output: 24VAC @ 4 amp or 28VAC @ 3.5 amp supply current. In-line fuse ia rated @ 3.5 amp/250V. Enclosure Dimensions: 5.75"H x 7"W x 4.5"D