OMRON B3U Series Ultra-small Tactile Switches are the industry's smallest class switches designed for high-density mounting of compact devices. B3U switches are available with embossed tape, which makes them ideal for automated mounting. The B3U ultra-small tactile switches come with dimensions of 1.2mm in width, 3mm in length, and 2.5mm in height. These B3U switches feature a maximum contact resistance of 100mΩ and a maximum shock resistance of 1000m/s2. Typical applications include portable audio players, computer peripherals, remote controllers, and mobile phones.