The QRB1114 consists of a infrared emitting diode and an NPN silicon
phototransistor mounted side by side on a converting optical axis in a black
plastic housing. The phototransistor responds to radiation from the emitting
diode only when a reflective object passes within its field of view. The area of
the optimum response approximates a circle of .200 inch in diameter. Board-mount style; non-insulated leads
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Data Sheet