Robertshaw 620-202 120V 50/60 Hz Plug-in Transformer -

Contractor-ready unit with non-polarized 120V plug-in blades and secondary 24V 50/60 Hz voltage stays isolated from the power source and is equipped with thermal fuse protection and a sealed tamper and impact resistant case Safety Enhanced: Thermal fuse protection prevents overheating; Unit has a sealed tamper and impact resistant case and is isolated from the power source; High quality construction complies with UL 1411 and applicable NEMA standards Service Call Efficiency: Trouble-fee maintenance gets transformer into service quickly; Secondary 24V AC, 50/60 Hz voltage of 24V AC; #6-32 output screw terminals for secondary lead length Quality Warmth: Robertshaw makes reliable controls and replacement parts for furnaces, water heaters, burners and boilers, including thermostats, switches, ignitor and heat pump controls, gas valves, and more