The BPV23 series, from Vishay Semiconductor, is a group of silicon PIN photodiodes. They are in a through-hole side-looking package with a black plastic lens and daylight filter. Its domed lens enables a higher sensitivity that flat lens packages.
Features of the BPV23 PIN photodiodes: Side looking package Dimensions: 4.5 x 5 x 6 mm Radiant sensitive area: 4.4 mm² High radiant sensitivity Fast response times Angle of half intensity: 60°