A Phototransistor is a two-lead or three-lead semiconductor that is more sensitive than a photodiode. It senses light levels and uses them to alter currents to create an electrical signal.
The bipolar semiconductor is can be made from silicon or another semi-conductive material.
How do Phototransistors work?
Once detection of light such as IR (infrared), visible light or UV (Ultraviolet) is successful, the device will alter a current flowing between an emitter and collector, depending on the light and level of intensity it receives.
Features and Benefits
• Reflow surface-mounting support
• Small, ultra-thin
• High sensitivity
• Electromagnetic noise resistance
• High linearity
• Produce a higher current than photodiodes
Where might I use a Phototransistor?
A photo transistor can be used in many different devices and applications such as:
• Photo interrupters
• Industrial electronics
• Human detection devices
• TV
• Air conditioning
• Digital photo-frames
• PCs or Laptops
• Automatic switches (lighting equipment)
• IP cameras
• Security devices
• Home electronics

Read more Read less


Viewing 1 - 2 of 2 products
Results per page
Description Price Spectrums Detected Typical Fall Time Typical Rise Time Number of Channels Maximum Light Current Maximum Dark Current Angle of Half Sensitivity Polarity Number of Pins Mounting Type Package Type Dimensions Collector Current Diameter
RS Stock No. 726-9436
Mfr. Part No.PS1195WB
Each (In a Pack of 10)
Infrared 9µs 8µs 1 7000µA 0.1µA 45 ° NPN 2 Surface Mount - 3.2 x 1.6 x 1.85mm 20mA -
RS Stock No. 168-7390
Mfr. Part No.PS1195WB
Each (On a Reel of 4000)
Infrared 9µs 8µs 1 7000µA 0.1µA 45 ° NPN 2 Surface Mount - 3.2 x 1.6 x 1.85mm 20mA -