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. 805-0549
Mfr. Part No.QTLP610CPDTR
HK$7.406
Each (In a Pack of 10)
units
Infrared 15µs 15µs 1 - 100nA 80 ° - 2 Surface Mount - 3.2 x 2.2 x 1.1mm 0.5mA -
RS Stock No. 665-5384
Mfr. Part No.SFH 310
HK$3.76
Each (In a Pack of 20)
units
Infrared, Visible Light 12µs 12µs 1 - 50nA 50 ° NPN 2 Through Hole 3mm (T-1) 3.4 x 3.4 x 4.8mm 50mA -
RS Stock No. 912-8545
Mfr. Part No.SFH 313 FA-2/3
HK$2.11
Each (In a Bag of 1000)
units
Infrared 14µs 14µs 1 12500µA 200nA 20 ° NPN 2 Through Hole T-1 3/4 5.9 x 5.9 x 9mm 50mA -
RS Stock No. 665-5369
Mfr. Part No.SFH 309 FA-3/4
HK$3.71
Each (In a Pack of 10)
units
Infrared 7µs 7µs 1 4500µA 200nA 24 ° NPN 2 Through Hole 3mm (T-1) 4 x 4 x 5.2mm 15mA -
RS Stock No. 805-0523
Mfr. Part No.QSB363ZR
HK$4.161
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. 182-8113
Mfr. Part No.RPT-37PB3F
BrandROHM
HK$5.161
Each (In a Pack of 20)
units
Infrared 10µs 10µs 1 2 (Minimum)mA 0.5µA ±36 ° - 2 Through Hole - 3.8 Dia. x 5.2mm 30mA 3.8mm
RS Stock No. 168-7390
Mfr. Part No.PS1195WB
HK$1.817
Each (On a Reel of 4000)
units
Infrared 9µs 8µs 1 7000µA 0.1µA 45 ° NPN 2 Surface Mount - 3.2 x 1.6 x 1.85mm 20mA -
RS Stock No. 170-9643
Mfr. Part No.SFH 3201-2/3-Z
HK$4.076
Each (On a Reel of 1000)
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. 146-1607
Mfr. Part No.SFH 3710-2/3-Z
HK$2.812
Each (On a Reel of 3000)
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. 665-5426
Mfr. Part No.SFH 3211 FA
HK$1.881
Each (In a Pack of 20)
units
Infrared 7µs 7µs 1 16µA 200nA 120 ° NPN 2 Surface Mount - 3.4 x 3 x 2mm 15mA -
RS Stock No. 168-5381
Mfr. Part No.SFH 320 FA-4-Z
HK$1.524
Each (On a Reel of 2000)
units
Infrared 7µs 7µs 1 1000µA 50nA 120 ° NPN 2 Surface Mount PLCC 3.4 x 3 x 2mm 15mA -
RS Stock No. 700-0782
Mfr. Part No.VEMT2020X01
BrandVishay
HK$5.33
Each (In a Pack of 20)
units
Infrared - - 1 9000µA 100nA 30 ° NPN 2 Surface Mount - 2.3 x 2.3 x 2.77mm 50mA -
RS Stock No. 665-5350
Mfr. Part No.SFH 309 FA
HK$4.131
Each (In a Pack of 20)
units
Infrared 7µs 7µs 1 - 200nA 24 ° NPN 2 Through Hole 3mm (T-1) 4 x 4 x 5.2mm 15mA -
RS Stock No. 710-3939
Mfr. Part No.VEMT3700F-GS08
BrandVishay
HK$6.685
Each (In a Pack of 10)
units
Infrared 6µs 6µs 1 5000µA 200nA 120 ° NPN 2 Surface Mount PLCC - 50mA -
RS Stock No. 168-5366
Mfr. Part No.BPX 85
HK$50.944
Each (In a Bag of 125)
units
- - - - - - - - 6 Through Hole DIP 7.4 x 2.1 x 3.6mm - -
RS Stock No. 168-5551
Mfr. Part No.BPX 43-4
HK$20.003
Each (In a Bag of 1000)
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
RS Stock No. 913-3301
Mfr. Part No.SFH 3600-3/4-Z
HK$2.644
Each (On a Reel of 2000)
units
Infrared, Visible Light 45µs 45µs 1 500µA 50nA 40 ° - 2 Surface Mount - 3.3 x 2.35 x 1.7mm 15mA -
RS Stock No. 168-5554
Mfr. Part No.SFH 320
HK$1.418
Each (On a Reel of 2000)
units
Infrared - - - - - - - 2 Surface Mount PLCC 3 x 3.4 x 2.1mm - -
RS Stock No. 169-7604
Mfr. Part No.SDP 8406-002
BrandHoneywell
HK$5.507
Each (In a Bag of 100)
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. 178-0647
Mfr. Part No.RPM-20PB
BrandROHM
HK$3.231
Each (In a Pack of 20)
units
Visible Light 10µs 10µs - 0.5 (Minimum)mA 0.5µA ±14 ° PNP 2 Through Hole DIP 4.3 x 3.2 x 4.4mm 30mA -
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