Control Transformers: Type - Industrial Control Transformer; Enclosure Construction Style - Open; Volts, Primary - 208/240/277/380/480V; Volts, Secondary - 24V; VA Rating - 250 VA; Frequency Rating - 50/60 Hz; Insulation Class - 130 deg C; Temperature Rise - 80 deg C; Size - 3.15" H x 4.65" W x 5.24" D; Terminal Type - Screw, Standard; Fusing - Dual Primary Fuse Holder Class CC; Additional Information - Transformer Type: Step-Down, Design Type: Open Core and Coil; Manufacturer Series - TB Series