TORK contactors with turn-lock photocontrols meet the most stringent safety and accuracy certifications for reliable use on roadways, bridges and general commercial facilities. Use the 5403A to control contactors from dusk to dawn for heavy-duty switching. The 3-5 second delayed OFF response prevents false switching from passing headlights and the contactor's NEMA Type 3R housing protects components both indoors and outdoors. The 5403A is rated for use with 120V, 50/60Hz. When you need accurate switching from dusk to dawn, choose a photocontrol from TORK, a pioneer in the industry since 1922.