Line Volt Mechanical Tstat for Heating Only, 120 to 277VAC/ OVERALL LENGTH: 2.000 INCHES NOMINAL OVERALL HEIGHT: 5.500 INCHES NOMINAL OVERALL WIDTH: 2.000 INCHES NOMINAL OPERATING TEMP RATING: -10.0 DEG FAHRENHEIT MINIMUM AND 100.0 DEG FAHRENHEIT MAXIMUM CONTACT LOAD CURRENT RATING: 60.0 AMPERES RESISTIVE LOAD SINGLE VOLTAGE CONTACT VOLTAGE RATING IN VOLTS: 250.0 AC AT SEA LEVEL SINGLE VOLTAGE FREQUENCY IN HERTZ: 60.0 SINGLE VOLTAGE