Phototransistors

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A phototransistor is a bipolar transistor whose base-collector junction is exposed to light. When a photon is absorbed in the junction region, an electron-hole pair is created and the photocurrent produced is then amplified as in a normal transistor. Shown here are NPN silicon phototransistors manufactured by Motorola (model MRD310). The outside diameter of the TO-18 package shown is mm. Photo Dec 2007.

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Size: 3291px × 5110px
Photo credit: © GIPhotoStock X / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: close, closeup, component, detector, electrical, electronics, life, light, macro, npn, optical, optics, photonics, phototransistor, physics, science, semiconductor, si, silicon, technology, transistor