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. 171-5580
Mfr. Part No.RPT-38PB3F
BrandROHM
$0.688
Each (In a Pack of 20)
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. 178-0029
Mfr. Part No.RPM-20PB
BrandROHM
$0.465
Each (In a Bag of 2000)
units
Visible Light 10µs 10µs - 0.5 (Minimum)mA 0.5µA ±14 ° - 2 Through Hole DIP 4.3 x 3.2 x 4.4mm 30mA -
RS Stock No. 124-6802
Mfr. Part No.RPT-34PB3F
BrandROHM
$0.42
Each (In a Pack of 25)
units
Infrared 10µs 10µs 1 2000µA 0.5µA ±36 ° NPN 2 Through Hole T-1 3.8 (Dia.) x 5.2mm 30mA 3.8mm
RS Stock No. 171-5420
Mfr. Part No.SML-810TBT86
BrandROHM
$0.228
Each (On a Reel of 3000)
units
- - - 1 3.8 0.5µA - NPN 2 Surface Mount SMD 3.4 x 1.25 x 1.1mm 30mA -
RS Stock No. 171-5581
Mfr. Part No.SML-810TBT86
BrandROHM
$0.357
Each (In a Pack of 25)
units
- - - 1 3.8mA 0.5µA - NPN 2 Surface Mount SMD 3.4 x 1.25 x 1.1mm 30mA -
RS Stock No. 171-5419
Mfr. Part No.RPT-38PB3F
BrandROHM
$700.30
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. 178-0631
Mfr. Part No.RPI-222
BrandROHM
$0.834
Each (In a Pack of 10)
units
Infrared 10µs 10µs - 0.95mA 0.5µA - NPN 4 Through Hole - 4.9 x 2.6 x 3.3mm 30mA -
RS Stock No. 178-0647
Mfr. Part No.RPM-20PB
BrandROHM
$0.731
Each (In a Pack of 20)
units
Visible Light 10µs 10µs - 0.5 (Minimum)mA 0.5µA ±14 ° - 2 Through Hole DIP 4.3 x 3.2 x 4.4mm 30mA -
RS Stock No. 178-0028
Mfr. Part No.RPI-222
BrandROHM
$0.531
Each (In a Bag of 2000)
units
Infrared 10µs 10µs - 0.95mA 0.5µA - NPN 4 Through Hole - 4.9 x 2.6 x 3.3mm 30mA -
RS Stock No. 182-8113
Mfr. Part No.RPT-37PB3F
BrandROHM
$0.658
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. 182-8043
Mfr. Part No.RPT-37PB3F
BrandROHM
$0.434
Each (In a Bag of 2000)
units
Infrared 10µs 10µs 1 2 (Minimum)mA 0.5µA ±36 ° - 2 Through Hole - 3.8 Dia. x 5.2mm 30mA 3.8mm