VEMT2500 and VEMT2520 Series PhototransistorsThe VEMT2500 and VEMT2520 series, from Vishay Semiconductor, are a family of silicon NPN phototransistors. They are in clear epoxy subminiature packages with a dome lens and a choice of lead options. The VEMT2500 and VEMT2520 phototransistors are sensitive to visible and near IR radiation.Features of the VEMT2500 and VEMT2520 phototransistors:Subminiature packageLead types: gull-wing (GW) or reverse gull-wing (RGW)Dimensions: 2.3 x 2.3 x 2.8 mmHigh radiant sensitivity Angle of half intensity: 15°Fast response timesPhototransistors, Vishay Semiconductor