The BPW77NA and BPW77NB series, from Vishay Semiconductor, are a range of silicon NPN phototransistors. They are in hermetically sealed TO-18 packages with a glass lens. The BPW77NA and BPW77NB phototransistors are sensitive to both visible and near IR radiation. They are ideal for use as detectors within electronic control and drive circuits.

Features of the BPW77NA and BPW77NB phototransistors:
TO-18 package
4.7mm diameted
Through-hole mounted
High photo sensitivity
High radiant sensitivity
Fast response times
Operating temperature: -40 to +125 °C

IR Phototransistors, Vishay Semiconductor