The YTSA016A0251801B Tactile Switch is a low profile SPST-NO type, SMD switch manufactured by DGBZ. It has an oval white button, a 4.2mm size, and it has no J pin. This switch is rated for a 50mA current, a 100MO resistance, a 100000 cycle rating, a 180gf operating force and is rated to a maximum voltage of 12V. It has a 3.4mm mounting height and a 2.5mm switch height. This switch is ROHS compliant.