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. 184-1423
Mfr. Part No.QSD123
MYR1.73
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. 539-858
Mfr. Part No.SFH 3410-3/4-Z
MYR4.012
Each (In a Pack of 5)
units
Infrared, Ultraviolet, Visible Light - - 1 25µA 3nA 120 ° NPN 3 Surface Mount DIP 2.1 x 2.7 x 1.05mm 20mA -
RS Stock No. 178-0631
Mfr. Part No.RPI-222
BrandROHM
MYR2.99
Each (In a Pack of 10)
units
Infrared 10µs 10µs - 0.95mA 0.5µA - NPN 4 Through Hole RPI-222 4.9 x 2.6 x 3.3mm 30mA -
RS Stock No. 168-5384
Mfr. Part No.SFH 3605-3/4-Z
MYR1.664
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. 170-0768
Mfr. Part No.OP593B
BrandOptek
MYR3.941
Each (In a Bag of 500)
units
Infrared - - 1 4000µA 100nA - NPN 2 Through Hole TO-18 5.72 x 5.72 x 7.62mm 50mA -
RS Stock No. 168-5306
Mfr. Part No.SFH 325 FA-3/4-Z
MYR1.144
Each (On a Reel of 2000)
units
Infrared 7µs 7µs 1 80µA 50nA 120 ° NPN 2 Surface Mount PLCC 4.2 x 4.2 x 3.8mm 15mA -
RS Stock No. 184-1082
Mfr. Part No.QRD1114
MYR3.894
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 1 (Minimum)mA -
RS Stock No. 168-5314
Mfr. Part No.SFH 310 FA-2/3
MYR0.74
Each (On a Tape of 2000)
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. 170-9647
Mfr. Part No.SFH 325-Z
MYR0.939
Each (On a Reel of 2000)
units
- 7µs 7µs 1 - 100nA ±60 ° Positive 2 Surface Mount PLCC 4.2 x 3.8 x 4.2mm 15mA -
RS Stock No. 915-4890
Mfr. Part No.SFH 3710-Z
MYR5.945
Each (In a Pack of 20)
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. 165-2868
Mfr. Part No.TEFT4300
BrandVishay
MYR0.961
Each (In a Bag of 1000)
units
Infrared 2.3µs 2µs 1 3200µA 200nA 60 ° NPN 2 Through Hole T-1 3.2 x 3.9 x 4.5mm 50mA -
RS Stock No. 168-5376
Mfr. Part No.SFH 309-5
MYR2.037
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. 708-0573
Mfr. Part No.SFH 3015 FA
MYR2.197
Each (In a Pack of 10)
units
Infrared 7µs 7µs - - 2nA 13 ° - - Surface Mount Side Looker 3 x 1.4 x 2.41mm 15mA -
RS Stock No. 477-6335
Mfr. Part No.PT100MF0MP1
BrandSharp
MYR2.54
Each (In a Pack of 5)
units
Infrared 6µs 5µs 1 - 100nA 30 ° NPN 2 Surface Mount - 3 x 1.5 x 2.2mm 20mA -
RS Stock No. 654-8889
Mfr. Part No.SFH 320 FA-3/4-Z
MYR1.427
Each (In a Pack of 10)
units
Infrared 7µs 7µs 1 1000µA 50nA 120 ° NPN 2 Surface Mount PLCC 3.4 x 3 x 2mm 15mA -
RS Stock No. 876-8694
Mfr. Part No.BPX 38-4
MYR21.55
Each (In a Pack of 5)
units
Infrared 15µs 15µs 1 2300µA 20 (≤ 100)nA ±40 ° NPN 3 Through Hole TO-18 4.8 (Dia.) x 5.5mm 50mA 4.8mm
RS Stock No. 708-2731
Mfr. Part No.TEFT4300
BrandVishay
MYR2.04
Each (In a Bag of 20)
units
Infrared 2.3µs 2µs 1 3200µA 200nA 60 ° NPN 2 Through Hole T-1 3.2 x 3.9 x 4.5mm 50mA -
RS Stock No. 654-8536
Mfr. Part No.SFH 313 FA-2/3
MYR2.38
Each (In a Pack of 10)
units
Infrared 14µs 14µs 1 12500µA 200nA 20 ° 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
MYR1.88
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. 700-0763
Mfr. Part No.TEMT7000X01
BrandVishay
MYR2.75
Each (In a Pack of 10)
units
Infrared, Visible Light - - 1 675µA 100nA 120 ° NPN 2 Surface Mount - 2 x 1.25 x 0.85mm 20mA -
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