E121SD1CGE is a sealed snap-acting momentary pushbutton switch featuring single-pole double-throw (SPDT) contact configuration rated for 1 Amp operation. The switch is process sealed with a disposable splashproof boot and epoxy seal to withstand machine soldering temperatures and pressure wash cleaning methods. It incorporates long-life contact design with break-before-make contacts, achieving 60,000 make-and-break cycles at full load, with contact resistance below 50 mO typical at 2–4 V DC and 100 mA. The device operates reliably across a temperature range of -30°C to 75°C and provides 1000 Vrms minimum dielectric strength at sea level. This switch is ideal for instrumentation, telecommunications and networking equipment, and computer peripherals where sealed, reliable momentary switching is required.