Photodiodes

Photodiodes are used in an array of every day electronic devices such as camera's, smoke detectors, burglar alarms, safety equipment, medical applications, CD players and surveying instruments to name a few.

What is a photodiode?

They are used as light sensors or detectors. When light reaches a photodiode, this is converted to electrical energy in the form of an electric current. The photocurrent that is produced is proportional to the amount of light. Photodiodes can also be known as photosensors, photodetectors and light detectors.

Photonic applications use the photon in the same way as electronic applications use the electron. There is usually a small amount of electric current that flows through these photosensitive devices even when no light (photons) are entering it. This is known as dark current.

What are the different types?

The PN photodiode was the first to be developed, it is not so widely used these days due to their relatively low performance compared to newer technologies.

The PIN photodiode has a wider surface area and allows for more light photons to be collected, as well as having a lower capacitance. It is the most widely used diode today.

Avalanche photodiodes are used in areas where there is low light, it operates under a high reverse bias condition. The higher the reverse voltage, the higher the gain.

Schottky photodiode is based on the schottky diode, or shottky barrier diode. It provides additional functions over others, particularly with regards to high speed and long wavelength detection.

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Description Price Spectrums Detected Wavelength of Peak Sensitivity Package Type Mounting Type Number of Pins Diode Material Minimum Wavelength Detected Maximum Wavelength Detected Typical Fall Time Length Width Height Angle of Half Sensitivity Automotive Standard
RS Stock No. 773-0418
Mfr. Part No.TEFD4300
BrandVishay
$0.817
Each (In a Bag of 10)
units
Infrared 950nm T-1 Through Hole 2 Si 350nm 1120nm - - - 4.5mm ±20 ° -
RS Stock No. 848-6275
Mfr. Part No.PIN DL-4
$174.13
Each
units
- 670nm TO-8 Through Hole 3 Si - - - - - 5.59mm - -
RS Stock No. 652-027
Mfr. Part No.QD7-5T
BrandCentronic
$53.71
Each
units
Infrared, Visible Light 340nm TO-5 Through Hole - Si 430nm 900nm - - - - - -
RS Stock No. 177-5566
Mfr. Part No.PIN DL-4
$374.245
Each (In a Tray of 2)
units
- 670nm TO-8 Through Hole 3 Si - - - - - 5.59mm - -
RS Stock No. 708-2813
Mfr. Part No.BPW21R
BrandVishay
$18.33
Each
units
Visible Light 565nm TO-5 Through Hole 2 Si 420nm 675nm - 9.1mm 9.1mm 3.1mm 50 ° -
RS Stock No. 177-7627
Mfr. Part No.BPW21R
BrandVishay
$14.84
Each (In a Box of 500)
units
Visible Light 565nm TO-5 Through Hole 2 Si 420nm 675nm - 9.1mm 9.1mm 3.1mm 50 ° -
RS Stock No. 124-7166
Mfr. Part No.S3932
$116.39
Each
units
Infrared 920nm - Through Hole 4 - 320nm 1100nm - 15.2mm 0.7mm 1.5mm - -
RS Stock No. 195-697
Mfr. Part No.SFH 203 FA
$1.37
Each
units
Infrared 900nm T-1 3/4 Through Hole 2 Si 800nm 1100nm - 5.9mm 5.9mm 9mm 20 ° -
RS Stock No. 177-5578
Mfr. Part No.FCI-INGAAS-500
$103.095
Each (In a Tray of 10)
units
- 1550nm TO-46 Through Hole 3 InGaAs 900nm 1700nm - - - 3.75mm - -
RS Stock No. 848-6285
Mfr. Part No.FCI-InGaAs-500
$66.06
Each
units
- 1550nm TO-46 Through Hole 3 InGaAs 900nm 1700nm - - - 3.75mm - -
RS Stock No. 124-7158
Mfr. Part No.S5971
$20.49
Each
units
Infrared, Visible Light 900nm TO-18 Through Hole 3 Si 320nm 1060nm - - - 3.6mm - -
RS Stock No. 124-7165
Mfr. Part No.S5629
$14.88
Each
units
Infrared 960nm SMD Surface Mount 20 - 760nm 1100nm - 9.7mm 5.4mm 1.7mm - -
RS Stock No. 124-7163
Mfr. Part No.S4584-06
$7.50
Each
units
Infrared 960nm SMD Surface Mount 4 - 320nm 1100nm - 4.1mm 5mm 1.8mm - -
RS Stock No. 124-7161
Mfr. Part No.S1223
$40.09
Each
units
Infrared, Visible Light 960nm TO-5 Through Hole 2 Si 320nm 1100nm - - - 4.1mm - -
RS Stock No. 564-037
Mfr. Part No.OSD 35-7X CQ
BrandCentronic
$124.59
Each
units
Ultraviolet 340nm - Through Hole - Si 194nm 400nm - - - 8mm - -
RS Stock No. 168-5307
Mfr. Part No.BPW 34 B
$5.43
Each (On a Reel of 250)
units
Infrared, Ultraviolet, Visible Light 850nm DIP Through Hole 2 Si 350nm 1100nm - 4.5mm 4mm 2.2mm 60 ° -
RS Stock No. 654-8514
Mfr. Part No.BPW 34 B
$9.30
Each
units
Infrared, Ultraviolet, Visible Light 850nm DIP Through Hole 2 Si 350nm 1100nm - 4.5mm 4mm 2.2mm 60 ° -
RS Stock No. 145-2618
Mfr. Part No.BPW20RF
BrandVishay
$6.599
Each (In a Bag of 500)
units
Infrared, Visible Light 920nm TO-5 Through Hole 2 Si 400nm 1100nm - 9.1mm 9.1mm 3.1mm 50 ° -
RS Stock No. 708-2804
Mfr. Part No.BPW20RF
BrandVishay
$9.95
Each
units
Infrared, Visible Light 920nm TO-5 Through Hole 2 Si 400nm 1100nm - 9.1mm 9.1mm 3.1mm 50 ° -
RS Stock No. 846-777
Mfr. Part No.OSD5-5T
BrandCentronic
$35.31
Each
units
Infrared, Visible Light 900nm TO-5 Through Hole - Si 430nm 900nm - - - - - -
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