The 5639A is a single-pole miniature toggle switch from APEM's 5000 series, featuring solder lug terminals and an ON-OFF-ON maintained contact function. This switch is designed for panel mounting with a threaded bushing of Ø 6.35 mm (1/4-40 UNS) and operates with contact positions at 1-2 (OFF) and 2-3 (ON). The switch accommodates various contact materials for both low and high current applications, with multiple actuator options including toggles, paddle levers, and locking levers in different lengths. It is available with epoxy-sealed terminals for enhanced environmental protection and is suitable for applications requiring reliable switching in compact panel-mounted configurations, including industrial control panels, instrumentation, and consumer electronics.