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. 184-1441
Mfr. Part No.QSD124
TWD15.20
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. 166-1740
Mfr. Part No.KDT00030TR
TWD6.10
Each (On a Reel of 3000)
units
- - - 1 1100µA 100nA - NPN 2 Surface Mount - 1.7 x 0.8 x 0.6mm - -
RS Stock No. 169-8673
Mfr. Part No.QSB363ZR
TWD5.80
Each (On a Reel of 1000)
units
Infrared 15µs 15µs 1 - 100nA 12 ° - 2 Surface Mount Subminiature 2.7 x 2.2 x 3mm 1.5mA -
RS Stock No. 184-1562
Mfr. Part No.QRD1113
TWD36.60
Each (In a Pack of 10)
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. 806-1763
Mfr. Part No.KDT00030TR
TWD16.10
Each (In a Pack of 20)
units
- - - 1 1100µA 100nA - NPN 2 Surface Mount - 1.7 x 0.8 x 0.6mm - -
RS Stock No. 184-1081
Mfr. Part No.QRD1113
TWD32.90
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. 166-1947
Mfr. Part No.QSE114
TWD8.80
Each (In a Bag of 500)
units
Infrared 8µs 8µs 1 - 100nA 25 ° - 2 Through Hole Side Looker 4.44 x 2.54 x 5.08mm 1.50mA -
RS Stock No. 184-1403
Mfr. Part No.QRD1114
TWD31.80
Each (In a Pack of 10)
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. 146-2097
Mfr. Part No.QSE113
TWD10.70
Each (In a Bag of 500)
units
Infrared 8µs 8µs 1 - 100nA 25 ° - 2 Through Hole Side Looker 4.44 x 2.54 x 5.08mm 1.50mA -
RS Stock No. 805-0549
Mfr. Part No.QTLP610CPDTR
TWD27.90
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. 166-3207
Mfr. Part No.QTLP610CPDTR
TWD12.70
Each (On a Reel of 2000)
units
Infrared 15µs 15µs 1 - 100nA 80 ° - 2 Surface Mount - 3.2 x 2.2 x 1.1mm 0.5mA -
RS Stock No. 146-2107
Mfr. Part No.QSB363
TWD6.30
Each (In a Bag of 1000)
units
Infrared 15µs 15µs 1 - 100nA 12 ° - 2 Surface Mount Subminiature 2.7 x 2.2 x 3mm 1.5mA -
RS Stock No. 805-0523
Mfr. Part No.QSB363ZR
TWD15.70
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. 184-1423
Mfr. Part No.QSD123
TWD13.90
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. 802-3317
Mfr. Part No.QSE113
TWD18.70
Each (In a Pack of 20)
units
Infrared 8µs 8µs 1 - 100nA 25 ° - 2 Through Hole Side Looker 4.44 x 2.54 x 5.08mm 1.50mA -
RS Stock No. 805-0517
Mfr. Part No.QSB363
TWD14.80
Each (In a Pack of 20)
units
Infrared 15µs 15µs 1 - 100nA 12 ° - 2 Surface Mount Subminiature 2.7 x 2.2 x 3mm 1.5mA -
RS Stock No. 184-1084
Mfr. Part No.QSD124
TWD8.40
Each (In a Bag of 250)
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. 184-1082
Mfr. Part No.QRD1114
TWD28.50
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. 184-1083
Mfr. Part No.QSD123
TWD7.70
Each (In a Bag of 250)
units
Infrared 7µs 7µs 1 - 100nA ±12 ° - 2 Through Hole T-1 3/4 6.1 Dia. x 8.77mm 16mA 6.1mm