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. 171-5419
Mfr. Part No.RPT-38PB3F
BrandROHM
SGD909.44
Each
units
Visible Light - - 1 2 (Minimum)mA 0.5µA ±36 ° NPN 2 Through Hole DIP 3.4 (Dia.) x 5.2mm 30mA 3.4mm
RS Stock No. 913-3281
Mfr. Part No.BPX 43-4/5
SGD5.45
Each (In a Bag of 1000)
units
Infrared, Visible Light 18µs 18µs 1 15000µA 100nA 30 ° NPN 3 Through Hole TO-18 5.6 x 5.6 x 6.2mm 50mA -
RS Stock No. 805-0523
Mfr. Part No.QSB363ZR
SGD0.525
Each (In a Pack of 25)
units
Infrared 15µs 15µs 1 - 100nA 12 ° - 2 Surface Mount Subminiature 2.7 x 2.2 x 3mm 1.5mA -
RS Stock No. 177-5961
Mfr. Part No.PT480E
BrandSharp
SGD0.793
Each (On a Reel of 1000)
units
- - - - - - - - - - - - - -
RS Stock No. 665-5347
Mfr. Part No.SFH 300
SGD0.678
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. 168-5363
Mfr. Part No.BPX 43-5
SGD3.46
Each (In a Bag of 1000)
units
Infrared, Visible Light 18µs 18µs 1 15000µA 100nA 30 ° NPN 3 Through Hole TO-18 5.6 x 5.6 x 6.2mm 50mA -
RS Stock No. 184-1441
Mfr. Part No.QSD124
SGD0.646
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. 665-5372
Mfr. Part No.SFH 309-5
SGD0.582
Each (In a Pack of 10)
units
Infrared, Ultraviolet, Visible Light 7µs 7µs 1 7200µA 200nA 24 ° NPN 2 Through Hole 3mm (T-1) 4 x 4 x 5.2mm 15mA -
RS Stock No. 184-7241
Mfr. Part No.1541201NEA400
SGD0.543
Each (In a Pack of 25)
units
Infrared - - 1 - 100 (Collector Emitter)nA 140 ° NPN 2 Surface Mount 1206 3.2 x 1.6 x 1.1mm 20mA -
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. 170-9651
Mfr. Part No.SFH 3710-Z
SGD0.627
Each (On a Reel of 3000)
units
Infrared, Ultraviolet, Visible Light - - 1 12.5µA 3nA 120 ° NPN 2 Surface Mount SMD 2.1 x 1.35 x 0.9mm 20mA -
RS Stock No. 168-5376
Mfr. Part No.SFH 309-5
SGD0.746
Each (In a Bag of 2000)
units
Infrared, Ultraviolet, Visible Light 7µs 7µs 1 7200µA 200nA 24 ° NPN 2 Through Hole 3mm (T-1) 4 x 4 x 5.2mm 15mA -
RS Stock No. 654-7808
Mfr. Part No.SFH 3310
SGD1.598
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. 184-1423
Mfr. Part No.QSD123
SGD0.589
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. 654-8744
Mfr. Part No.SFH 310 FA-2/3
SGD0.696
Each (In a Pack of 10)
units
Infrared 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. 184-7228
Mfr. Part No.1541201NC3060
SGD0.543
Each (In a Pack of 25)
units
Infrared - - 1 - 100 (Collector Emitter)nA 30 ° NPN 2 Surface Mount 1206 3.2 x 1.6 x 1.85mm 20mA -
RS Stock No. 710-4926
Mfr. Part No.TEMT1020
BrandVishay
SGD0.958
Each (In a Pack of 10)
units
Infrared 2.3µs 2µs 1 7000µA 200nA 30 ° NPN 2 Surface Mount Subminiature 2.5 x 2 x 2.7mm 50mA -
RS Stock No. 876-8704
Mfr. Part No.BPX 43-4
SGD7.782
Each (In a Pack of 5)
units
Infrared 15µs 15µs 1 9500µA 20 (≤ 100)nA ±15 ° NPN 3 Through Hole TO-18 4.8 (Dia.) x 6.2mm 50mA 4.8mm
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