Double Pole Double Throw relays supply two single double through relays, SPDT,in one relay package. This combination provides tremendous design flexibility. Dual circuit functions can be controlled with a single coil signal. Since the contacts are mechanically linked in many applications one of the contact sets are used as auxiliary contacts to provide circuit feedback indicating relay contact position. As with our other High Voltage Relays GLVAC offers several design styles of vacuum and gas filled High Voltage Relays. Vacuum or gas as a dielectric each offer unique advantages depending on the application. Complete specifications can be found by clicking on the product photo or part number.