The 51681 is a microminiature tactile switch from the PTS 525 series, designed for surface-mount applications. It provides momentary switching in a compact 5.25 x 5.25 mm package, saving valuable PCB space. The switch has a contact rating of 50 mA at 12 V DC, an initial contact resistance of 100 mΩ maximum, and a long life expectancy of 100,000 operations. It is designed to operate in temperatures ranging from -40°C to 60°C. With its ultra-low profile and reliable performance, this switch is ideal for hand-held devices, consumer products, instrumentation, and computer peripherals.