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. 848-6257
Mfr. Part No.FCI-InGaAs-1000
£61.58
Each
Units
Infrared 1550nm TO-46, TO-5 Through Hole 2 InGaAs 900nm 1700nm - - - 3.81mm - -
RS Stock No. 415-5722
Mfr. Part No.S1223-01
£7.02
Each
Units
Infrared, Ultraviolet, Visible Light 960nm TO-5 Through Hole 2 Si 320nm 1100nm - 9.1mm 9.1mm 4.1mm - -
RS Stock No. 168-5299
Mfr. Part No.SFH 203
£0.179
Each (On a Tape of 1000)
Units
Infrared, Visible Light 850nm - Through Hole 2 Si 400nm 1100nm - 5.9mm 4.8mm 9mm 20 ° -
RS Stock No. 654-8154
Mfr. Part No.SFH 203
£0.656
Each (In a Pack of 5)
Units
Infrared, Visible Light 850nm T-1 3/4 Through Hole 2 Si 750nm 1100nm - 5.9mm 4.8mm 9mm 20 ° -
RS Stock No. 497-5661
Mfr. Part No.BPW 21
£9.40
Each
Units
Infrared, Ultraviolet, Visible Light 550nm TO-39 Through Hole 2 Si 350nm 820nm - 9.5mm 9.5mm 3.7mm 55 ° -
RS Stock No. 168-5245
Mfr. Part No.BPW 21
£6.743
Each (In a Box of 40)
Units
Infrared, Ultraviolet, Visible Light 550nm TO-39 Through Hole 2 Si 350nm 820nm - 9.5mm 9.5mm 3.7mm 55 ° -
RS Stock No. 195-697
Mfr. Part No.SFH 203 FA
£2.00
Each
Units
Infrared 900nm T-1 3/4 Through Hole 2 Si 800nm 1100nm - 5.9mm 5.9mm 9mm 20 ° -
RS Stock No. 913-3285
Mfr. Part No.SFH 2701
£0.196
Each (On a Reel of 3000)
Units
Infrared, Visible Light 820nm Chip LED Surface Mount 2 - 400nm 1050nm - 3.35mm 1.65mm 1.25mm 60 ° -
RS Stock No. 654-8902
Mfr. Part No.SFH 213
£0.754
Each (In a Pack of 5)
Units
Infrared, Visible Light 850nm T-1 3/4 Through Hole 2 Si 400nm 1100nm - 5.9mm 5mm 9mm 10 ° -
RS Stock No. 627-8366
Mfr. Part No.VTB8440BH
£3.89
Each
Units
Visible Light 580nm Ceramic Through Hole 2 Si 330nm 720nm - - - 7.87mm - -
RS Stock No. 912-8573
Mfr. Part No.SFH 213
£0.225
Each (In a Bag of 1000)
Units
Infrared, Visible Light 850nm - Through Hole 2 Si 400nm 1100nm - 5.9mm 5mm 9mm 10 ° -
RS Stock No. 165-2428
Mfr. Part No.BPW34
BrandVishay
£0.323
Each (On a Reel of 3000)
Units
Infrared, Visible Light 900nm - Through Hole 2 Si 430nm 1100nm - 4.5mm 4.3mm 2mm 65 ° -
RS Stock No. 699-7616
Mfr. Part No.BPW34
BrandVishay
£0.842
Each (In a Pack of 5)
Units
Infrared, Visible Light 900nm - Through Hole 2 Si 430nm 1100nm - 4.5mm 4.3mm 2mm 65 ° -
RS Stock No. 497-5677
Mfr. Part No.BPX 65
£4.46
Each
Units
Infrared, Ultraviolet, Visible Light 850nm TO-18 Through Hole 2 Si 350nm 1100nm - 5.6mm 5.6mm 5.5mm 40 ° -
RS Stock No. 912-8306
Mfr. Part No.BPX 65
£2.695
Each (In a Tray of 120)
Units
Infrared 850nm TO-18 Through Hole 2 Si 350nm 1100nm 0.012µs - 5.5mm - ±40 ° -
RS Stock No. 848-6266
Mfr. Part No.FCI-InGaAs-120L-FC
£52.64
Each
Units
- 1550nm Pigtail Through Hole 3 InGaAs 900nm 1700nm - - - 19.2mm - -
RS Stock No. 177-5565
Mfr. Part No.FCI-INGAAS-120L-FC
£57.205
Each (In a Tray of 2)
Units
- 1550nm Pigtail Through Hole 3 InGaAs 900nm 1700nm - - - 19.2mm - -
RS Stock No. 177-7627
Mfr. Part No.BPW21R
BrandVishay
£6.605
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. 652-027
Mfr. Part No.QD7-5T
BrandCentronic
£29.50
Each
Units
Infrared, Visible Light 340nm TO-5 Through Hole - Si 430nm 900nm - - - - - -
RS Stock No. 708-2813
Mfr. Part No.BPW21R
BrandVishay
£9.22
Each
Units
Visible Light 565nm TO-5 Through Hole 2 Si 420nm 675nm - 9.1mm 9.1mm 3.1mm 50 ° -
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