The 8121SD9V31GE is an SPDT snap-acting momentary pushbutton switch from the 8020 series. It features gold-over-silver contacts rated for 1 Amp at 120V AC or 28V DC, and is also suitable for low-level applications at 0.4 VA maximum. This switch is configured with a plunger actuator, a .460-inch high snap-in V-bracket for vertical PC mounting, and an epoxy terminal seal that ensures compatibility with bottom-wash cleaning processes. With an electrical life of 60,000 cycles and an operating temperature range of -30°C to 75°C, it offers reliable performance in various environments. Common applications include instrumentation, computer peripherals, and telecommunications equipment.