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. 195-849
Mfr. Part No.SDP8436-003
BrandHoneywell
£2.00
Each
Units
- 15µs 15µs 1 17500µA 100nA 18 ° NPN 2 Through Hole Side Looker 4.57 x 4.29 x 3.3mm - -
RS Stock No. 221-5298
Mfr. Part No.SD2440-003
BrandHoneywell
£4.47
Each
Units
- 15µs 15µs 1 4000µA 100nA 48 ° NPN 2 Panel Mount Pill 1.57 x 1.57 x 3.18mm - -
RS Stock No. 169-7618
Mfr. Part No.SD2440-003
BrandHoneywell
£2.685
Each (In a Bag of 100)
Units
- 15µs 15µs 1 4000µA 100nA 48 ° NPN 2 Panel Mount Pill 1.57 x 1.57 x 3.18mm - -
RS Stock No. 171-4895
Mfr. Part No.SD1410-003L
BrandHoneywell
£5.82
Each
Units
- 75µs 75µs 1 4000µA 250nA 24 ° NPN 2 Through Hole Metal Can 2.41 x 2.41 x 3.1mm - -
RS Stock No. 171-4867
Mfr. Part No.SDP 8406-002
BrandHoneywell
£2.00
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. 169-7604
Mfr. Part No.SDP 8406-002
BrandHoneywell
£0.564
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. 171-4902
Mfr. Part No.SD5410-002
BrandHoneywell
£5.40
Each
Units
Infrared 75µs 75µs 1 4000µA 250nA 12 ° NPN 3 Through Hole TO-46 5.56 x 5.56 x 3.89mm - -
RS Stock No. 169-7607
Mfr. Part No.SD5410-002
BrandHoneywell
£2.989
Each (In a Bag of 100)
Units
Infrared 75µs 75µs 1 4000µA 250nA 12 ° NPN 3 Through Hole TO-46 5.56 x 5.56 x 3.89mm - -