Phototransistors

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 Stock No. 654-8019
Mfr. Part No.SFH 309 FA-4/5
£0.323
Each (In a Pack of 10)
Units
Infrared 7µs 7µs 1 7200µA 200nA 24 ° NPN 2 Through Hole 3mm (T-1) 4 x 4 x 5.2mm 15mA -
RS Stock No. 912-8514
Mfr. Part No.SFH 309 FA-4/5
£0.127
Each (In a Bag of 2000)
Units
Infrared 7µs 7µs 1 7200µA 200nA 24 ° NPN 2 Through Hole T-1 4 x 4 x 5.2mm 15mA -
RS Stock No. 168-5289
Mfr. Part No.LPT 80A
£0.206
Each (In a Box of 2000)
Units
Infrared, Visible Light 10µs 10µs 1 3200µA 3nA 70 ° NPN 2 Through Hole Side Looker 4.57 x 2.54 x 5.84mm 50mA -
RS Stock No. 654-7993
Mfr. Part No.LPT 80A
£0.598
Each (In a Pack of 10)
Units
Infrared, Visible Light 10µs 10µs 1 3200µA 3nA 70 ° NPN 2 Through Hole Side Looker 4.57 x 2.54 x 5.84mm 50mA -
RS Stock No. 654-8047
Mfr. Part No.SFH 300 FA-3/4
£0.412
Each (In a Pack of 10)
Units
Infrared 10µs 10µs 1 7700µA 50nA 50 ° NPN 2 Through Hole 5mm (T-1 3/4) 5.9 x 5.9 x 9mm 50mA -
RS Stock No. 912-8526
Mfr. Part No.SFH 300 FA-3/4
£0.206
Each (In a Bag of 1000)
Units
Infrared 10µs 10µs 1 7700µA 50nA 50 ° NPN 2 Through Hole T-1 3/4 5.9 x 5.9 x 9mm 50mA -
RS Stock No. 654-7808
Mfr. Part No.SFH 3310
£0.95
Each (In a Pack of 5)
Units
Infrared, Ultraviolet, Visible Light - - 1 8µA 3nA 150 ° NPN 2 Through Hole 3mm (T-1) 4 x 4 x 3.1mm 20mA -
RS Stock No. 912-8504
Mfr. Part No.SFH 3310
£0.284
Each (In a Bag of 2000)
Units
Infrared, Ultraviolet, Visible Light - - 1 8µA 3nA 150 ° NPN 2 Through Hole T-1 4 x 4 x 3.1mm 20mA -
RS Stock No. 146-1622
Mfr. Part No.SFH 300
£0.167
Each (In a Bag of 1000)
Units
Infrared, Visible Light 10µs 10µs 1 - 50nA 50 ° NPN 2 Through Hole 5mm (T-1 3/4) 5.9 x 5.9 x 9mm 50mA -
RS Stock No. 665-5347
Mfr. Part No.SFH 300
£0.333
Each (In a Pack of 20)
Units
Infrared, Visible Light 10µs 10µs 1 - 50nA 50 ° NPN 2 Through Hole 5mm (T-1 3/4) 5.9 x 5.9 x 9mm 50mA -
RS Stock No. 654-8738
Mfr. Part No.SFH 3100 F
£0.51
Each (In a Pack of 10)
Units
Infrared 9µs 7µs 1 400µA 50nA 28 ° NPN 2 Through Hole Side Looker 3.1 x 2.2 x 4.1mm 50mA -
RS Stock No. 912-8551
Mfr. Part No.SFH 3100 F
£0.167
Each (In a Bag of 2000)
Units
Infrared 9µs 7µs 1 400µA 50nA 28 ° NPN 2 Through Hole 3 mm 3.1 x 2.2 x 4.1mm 50mA -
RS Stock No. 146-1626
Mfr. Part No.SFH 310 FA
£0.095
Each (In a Bag of 2000)
Units
Infrared 12µs 12µs 1 - 50nA 50 ° NPN 2 Through Hole 3mm (T-1) 3.4 x 3.4 x 4.8mm 50mA -
RS Stock No. 665-5388
Mfr. Part No.SFH 310 FA
£0.099
Each (In a Pack of 20)
Units
Infrared 12µs 12µs 1 - 50nA 50 ° NPN 2 Through Hole 3mm (T-1) 3.4 x 3.4 x 4.8mm 50mA -
RS Stock No. 168-5291
Mfr. Part No.SFH 300-3/4
£0.206
Each (On a Tape of 1000)
Units
Infrared, Visible Light 10µs 10µs 1 7700µA 50nA 50 ° NPN 2 Through Hole 5mm (T-1 3/4) 5.9 x 5.9 x 9mm 50mA -
RS Stock No. 654-8031
Mfr. Part No.SFH 300-3/4
£0.412
Each (In a Pack of 10)
Units
Infrared, Visible Light 10µs 10µs 1 7700µA 50nA 50 ° NPN 2 Through Hole 5mm (T-1 3/4) 5.9 x 5.9 x 9mm 50mA -
RS Stock No. 168-5310
Mfr. Part No.SFH 310-2/3
£0.109
Each (On a Tape of 2000)
Units
Infrared, Visible Light 12µs 12µs 1 4800µA 50nA 50 ° NPN 2 Through Hole 3mm (T-1) 3.4 x 3.4 x 4.8mm 50mA -
RS Stock No. 654-8542
Mfr. Part No.SFH 310-2/3
£0.114
Each (In a Pack of 10)
Units
Infrared, Visible Light 12µs 12µs 1 4800µA 50nA 50 ° NPN 2 Through Hole 3mm (T-1) 3.4 x 3.4 x 4.8mm 50mA -
RS Stock No. 168-5553
Mfr. Part No.SFH 309 FA-4
£0.137
Each (In a Bag of 2000)
Units
Infrared 7µs 7µs 1 4500µA 1 (≤ 50)nA ±12 ° NPN 2 Through Hole 3mm (T-1) 3.1 (Dia.) x 5.2mm 15mA 3.1mm
RS Stock No. 876-8710
Mfr. Part No.SFH 309 FA-4
£0.343
Each (In a Pack of 25)
Units
Infrared 7µs 7µs 1 4500µA 1 (≤ 50)nA ±12 ° NPN 2 Through Hole 3mm (T-1) 3.1 (Dia.) x 5.2mm 15mA 3.1mm