Rheem/protech 47-21711-16 - limit switch - auto reset (board mount) - rheem/ruud/protech - a complete line of oem and factory Replacement parts for your furnace; air conditioner; water heater; air handler; boiler; rooftop unit and more. Technical data tod switch series: 36T category: general purpose reset mode: auto no. Of poles: 1 switch type: spst contact orientation: normally closed maximum voltage rating (vac): 120/230 maximum current rating (a): 15/10 open temperature (F): 210 tolerance open temperature (F): +/-7 close temperature (F): 190 nominal temperature difference (F): 20 disc face: enclosed mounting: board mount - 90 degree strap angle mounting board dimensions (in.): 1-7/8 x 2-3/4 mounting insertion depth - maximum (in.): 7 connections: 1/4 in. Quick connects.