The 5639AD is a miniature single-pole toggle switch from APEM's 5000 series, featuring solder lug terminals and a threaded bushing with Ø 6.35 mm (1/4-40 UNS). This switch offers maintained and momentary contact configurations with contact positions at 2-3 (ON) and 1-2 (OFF/momentary), providing flexible switching functionality for low and high current applications. The switch is housed in a compact case with standard toggle lever actuation and includes epoxy-sealed terminals for environmental protection. It is approved by UL, CSA, and CECC standards, making it suitable for industrial control panels, consumer electronics, and instrumentation where reliable miniature switching is required.