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

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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庫存編號 665-5287
製造零件編號BPY 62
/個 (每包:5個)
Infrared, Visible Light 12µs 12µs 1 500µA 50nA 16 ° NPN 3 Through Hole TO-18 5.6 x 5.6 x 6.2mm 100mA -
RS庫存編號 577-544
Infrared 3.5µs 3µs - - 1000nA 13 ° NPN 2 Through Hole Side Looker 3 x 2.95 x 21.5mm 20mA -
RS庫存編號 146-1607
製造零件編號SFH 3710-2/3-Z
個 (在毎卷:3000)
Infrared, Ultraviolet, Visible Light - - 1 350µA 3nA 120 ° NPN 2 Surface Mount - 2.1 x 1.35 x 0.9mm 20mA -
RS庫存編號 654-8889
製造零件編號SFH 320 FA-3/4-Z
/個 (每包:10個)
Infrared 7µs 7µs 1 1000µA 50nA 120 ° NPN 2 Surface Mount PLCC 3.4 x 3 x 2mm 15mA -
RS庫存編號 654-8722
製造零件編號SFH 3410-2/3-Z
/個 (每包:5個)
Infrared, Ultraviolet, Visible Light - - 1 16µA 3nA 120 ° NPN 3 Surface Mount DIP 2.1 x 2.7 x 1.05mm 20mA -