Part Number	QCK3 Datasheet
Manufacturer	Fairchild Semiconductor
Overview	The QCK3/QCK4 is a slotted opticalswitch designed for surface mount applications where extreme temperatures are experienced during solder reflow. The switch consists of a GaAs LED and a silicon photoda. * Unique single piece housing designed to reduce cost. * High temperature housing material to withstand extreme temperature. * Shipped in plastic tubes for protection of leads and to feed automatic placement equipment. * Sensor package is infrared transparent and tinted to attenuate visible light. .