Hot Surface Furnace Ignitor 4 1/2" Lead Wire The Robertshaw 41-400 Series Norton Hot Surface Ignitors deliver dependable ignition in heating systems of every description. From furnaces and boilers to rooftop heaters, infrared burners, unit heaters, water heaters and many other types of HVAC equipment. The 41-400 Series Hot Surface Ignitors are made of high-purity recrystallized silicon carbide (Crystarâ„¢) which combines physical and thermal strength with stable electrical properties. The 41-400 Series are designed to reach ignition temperature(s) within 17 seconds. They have 18-gauge nickel chrome lead wires embedded and metalized in place for maximum holding strength and electrical conductivity. The lead wires are also enclosed with a special high-temperature fiberglass insulation providing total electrical protection. NOTE: All 41-400 series ignitors are 120 VAC models. Some hot surface modules are rated for 208/240 volts input, however they step the voltage to ignitor down to 120 VAC. Replaces: EATON FI-404 Functional NORTON 271M Functional NORTON MB258912 Exact NORTON MB478265 Exact STARLITE 11120-100-1405 Functional UNI-LINE 63469 Exact Uni-Line UPC number. Number may appear preceded by Uni-Line's vendor i.d. number, 662013.ex. 66201312345. W.W. GRAINGER 5JA29 Exact WEIL MCLAIN 511-330-190 Exact WHITE-RODGERS 767A-382 Functional