The B3S series from Omron are surface mount tactile switches for high contact reliability. SPST-NO contact configuration Switching capacity of 1 to 50mA at 5VDC to 24VDC Maximum contact resistance of 100mohm Minimum insulation resistance of 100Mohm Sealed construction conforming to IP67 Surface mounting terminals for high density mounting Ground terminal available to protect against static electricity Operating force of 160gf (general purpose) and 230gf (high force) 6mm x 6mm size Applications Industrial, Power Management, Automation & Process Control