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. 654-8542
Mfr. Part No.SFH 310-2/3
SGD0.761
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. 908-7025
Mfr. Part No.OP550A
BrandOptek
SGD1.006
Each (In a Pack of 50)
units
Visible Light - - 1 - 100nA - NPN 2 Through Hole Side-Looking 4.57 x 2.54 x 5.84mm 2.55mA -
RS Stock No. 455-8014
Mfr. Part No.ST23G, C
BrandKodenshi
SGD2.018
Each (In a Pack of 5)
units
Infrared 4.8µs 3.2µs - 20000µA 100nA 30 ° NPN 2 Through Hole 5mm (T-1 3/4) 4.6 x 2.54 x 4.6mm 40mA -
RS Stock No. 170-9652
Mfr. Part No.SFH 3605-2/3
SGD0.456
Each (On a Reel of 2000)
units
Infrared, Visible Light 45µs 45µs 1 320µA 50nA 40 ° - 2 Surface Mount MIDLED 3.3 x 2.35 x 1.7mm 15mA -
RS Stock No. 184-1441
Mfr. Part No.QSD124
SGD0.701
Each (In a Pack of 25)
units
Infrared 7µs 7µs 1 - 100nA ±12 ° - 2 Through Hole T-1 3/4 6.1 Dia. x 8.77mm 39mA 6.1mm
RS Stock No. 165-2773
Mfr. Part No.VEMT2520X01
BrandVishay
SGD0.373
Each (On a Reel of 6000)
units
Infrared, Visible Light - - 1 9000µA 100nA ±15 ° - 2 Surface Mount Subminiature 2.3 x 2.3 x 2.77mm 50mA -
RS Stock No. 654-8918
Mfr. Part No.SFH 3710-3/4-Z
SGD0.814
Each (In a Pack of 5)
units
Infrared, Ultraviolet, Visible Light - - 1 570µA 3nA 120 ° NPN 2 Surface Mount - 2.1 x 1.35 x 0.9mm 20mA -
RS Stock No. 171-4867
Mfr. Part No.SDP 8406-002
BrandHoneywell
SGD1.95
Each
units
- 15µs 15µs 1 3600µA 100nA 50 ° NPN 2 Through Hole Side Looker 4.45 x 2.28 x 5.72mm 36mA -
RS Stock No. 184-1081
Mfr. Part No.QRD1113
SGD1.524
Each (In a Bag of 100)
units
Infrared 50µs 10µs 1 - 100nA - - 4 Through Hole Custom 4L 4.39 x 6.1 x 4.65mm 0.3 (Minimum)mA -
RS Stock No. 234-0978
Mfr. Part No.OP593B
BrandOptek
SGD1.09
Each
units
Infrared - - 1 4000µA 100nA - NPN 2 Through Hole TO-18 5.72 x 5.72 x 7.62mm 50mA -
RS Stock No. 146-0737
Mfr. Part No.PT100MF0MP
BrandSharp
SGD0.394
Each (On a Reel of 2000)
units
Infrared 6µs 5µs 1 3.45mA 100nA ±15 ° Positive 2 Surface Mount SMD 3 x 1.5 x 2.2mm 20mA -
RS Stock No. 168-5372
Mfr. Part No.SFH 300 FA
SGD0.336
Each (In a Bag of 1000)
units
Infrared 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. 184-7189
Mfr. Part No.1541411NBA210
SGD0.541
Each (In a Pack of 25)
units
Infrared, Visible Light - - 1 - 100 (Collector Emitter)nA 120 ° NPN 2 Surface Mount 3528 3.5 x 2.8 x 1.9mm 20mA -
RS Stock No. 915-4875
Mfr. Part No.SFH 3211 FA-3/4-Z
SGD0.374
Each (In a Pack of 20)
units
Infrared 7µs 7µs 1 1000µA 200nA 120 ° NPN 2 Surface Mount SMD 3.4 x 3 x 2mm 15mA -
RS Stock No. 184-1423
Mfr. Part No.QSD123
SGD0.629
Each (In a Pack of 25)
units
Infrared 7µs 7µs 1 - 100nA ±12 ° - 2 Through Hole T-1 3/4 6.1 Dia. x 8.77mm 16mA 6.1mm
RS Stock No. 915-4866
Mfr. Part No.SFH 3201-2/3-Z
SGD0.938
Each (In a Pack of 20)
units
Infrared, Visible Light 24µs 24µs 1 4200µA 200nA 120 ° NPN 6 Surface Mount SMD 4.2 x 3.4 x 2.1mm 50mA -
RS Stock No. 168-5317
Mfr. Part No.SFH 320-3/4-Z
SGD0.289
Each (On a Reel of 2000)
units
Infrared, Visible Light 7µs 7µs 1 1000µA 50nA 120 ° NPN 2 Surface Mount PLCC 3.4 x 3 x 2mm 15mA -
RS Stock No. 915-4884
Mfr. Part No.SFH 325-4-Z
SGD0.622
Each (In a Pack of 20)
units
Infrared, Visible Light 7µs 7µs 1 80µA 50nA 120 ° NPN 2 Surface Mount PLCC 4.2 x 4.2 x 3.8mm 15mA -
RS Stock No. 539-836
Mfr. Part No.SFH 3710-2/3-Z
SGD0.911
Each (In a Pack of 10)
units
Infrared, Ultraviolet, Visible Light - - 1 350µA 3nA 120 ° NPN 2 Surface Mount - 2.1 x 1.35 x 0.9mm 20mA -
RS Stock No. 124-6802
Mfr. Part No.RPT-34PB3F
BrandROHM
SGD0.798
Each (In a Pack of 25)
units
Infrared 10µs 10µs 1 2000µA 0.5µA ±36 ° NPN 2 Through Hole T-1 3.8 (Dia.) x 5.2mm 30mA 3.8mm