Transformer Relay Coil Volts 24 Transformer Primary (V) 120 V Transformer Secondary (V) 24 V Switch Type 2 SPST plus 1 Powerpile SPST - HP - 7.4 A Full Load Amps @ 120VAC 44.4 A - - - - - Full Load Amps @ 240VAC - - - Full Load Amps @ 277V - - - - - - - 12 VA - - - - 6 1/4 in 4 7/16 in 3 1/2 in Universal Mounting Hydronic Heating Systems UL Includes 120/24V AC Transformer Push-to-start Button and Replaceable Transformer Fuse Trouble Shooting LEDs