Temperature Controller; Voltage Rating 120 to 240 Volt AC; Minimum AC Voltage Rating (V) 120 Volt; Maximum AC Voltage Rating (V) 240 Volt; Minimum DC Voltage Rating (V) 0.25 Volt; Maximum DC Voltage Rating (V) 12 Volt; Operating Temperature 110 to 220 Deg F (Low Limit), 130 to 240 Deg F (High Limit); Humidity 0 to 95 Percent RH, Non-Condensing; Size 4-3/32" Width x 2-11/16" Depth x 3-7/8" Height; Mounting Horizontal; Application High Limit and Circulator, Boiler, Gas or Oil-Fired Hydronic Heating System; Approval UL, CSA; Contact Rating 5.1 Amp at 240 Volt AC, 8 Amp at 120 Volt AC (Full Load); 30.6 Amp at 240 Volt AC, 48 Amp at 120 Volt AC (Locked Rotor), 0.25 Amp at 0.25 to 12 Volt DC; Differential Temperature Rating 10 Deg F Fixed (High Limit), 10 to 25 Deg F Adjustable (Low Limit); Operating Pressure 200 PSI (Immersion Well), 100 PSI (Direct Immersion); Switch Type SPST; Insulation Depth 1-1/2"; Well Spud Size 3/4"-14 TPI Threaded; Includes Push-In Field Addable Jumper