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 Spectral Range of Sensitivity Diode Material Minimum Wavelength Detected Maximum Wavelength Detected Typical Fall Time Length Width Height Dimensions
RS Stock No. 168-5163
Mfr. Part No.BPW 34
$0.654
Each (On a Reel of 1000)
units
Infrared, Visible Light 850nm DIP Through Hole 2 - Si 400nm 1100nm - 4.5mm 4mm 2.2mm -
RS Stock No. 247-240
Mfr. Part No.BPW 34
$1.47
Each (In a Pack of 5)
units
Infrared, Visible Light 850nm DIP Through Hole 2 - Si 400nm 1100nm - 4.5mm 4mm 2.2mm -
RS Stock No. 124-7165
Mfr. Part No.S5629
$14.76
Each
units
Infrared 960nm SMD Surface Mount 20 - - 760nm 1100nm - 9.7mm 5.4mm 1.7mm -
RS Stock No. 654-8895
Mfr. Part No.SFH 213 FA
$1.082
Each (In a Pack of 5)
units
Infrared 900nm T-1 3/4 Through Hole 2 - Si 750nm 1100nm - 5.9mm 5mm 9mm -
RS Stock No. 912-8564
Mfr. Part No.SFH 213 FA
$0.527
Each (In a Bag of 1000)
units
Infrared 900nm - Through Hole 2 - Si 750nm 1100nm - 5.9mm 5mm 9mm -
RS Stock No. 124-7161
Mfr. Part No.S1223
$16.76
Each
units
Infrared, Visible Light 960nm TO-5 Through Hole 2 - Si 320nm 1100nm - - - 4.1mm -
RS Stock No. 168-5245
Mfr. Part No.BPW 21
$13.603
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 -
RS Stock No. 497-5661
Mfr. Part No.BPW 21
$17.25
Each
units
Infrared, Ultraviolet, Visible Light 550nm TO-39 Through Hole 2 - Si 350nm 820nm - 9.5mm 9.5mm 3.7mm -
RS Stock No. 168-5300
Mfr. Part No.KOM 2125-Z
$7.676
Each (On a Reel of 1400)
units
Infrared, Visible Light 850nm DIP Surface Mount 3 - Si 400nm 1100nm - 8.5mm 4.5mm 1.2mm -
RS Stock No. 654-8233
Mfr. Part No.KOM 2125-Z
$6.88
Each
units
Infrared, Visible Light 850nm DIP Surface Mount 3 - Si 400nm 1100nm - 8.5mm 4.5mm 1.2mm -
RS Stock No. 913-3285
Mfr. Part No.SFH 2701
$0.478
Each (On a Reel of 3000)
units
Infrared, Visible Light 820nm Chip LED Surface Mount 2 - - 400nm 1050nm - 3.35mm 1.65mm 1.25mm -
RS Stock No. 699-7610
Mfr. Part No.BPW41N
BrandVishay
$1.502
Each (In a Pack of 5)
units
Infrared 950nm Side Looker Through Hole 2 - Si 870nm 1050nm - 5mm 3mm 6.4mm -
RS Stock No. 124-7158
Mfr. Part No.S5971
$12.20
Each
units
Infrared, Visible Light 900nm TO-18 Through Hole 3 - Si 320nm 1060nm - - - 3.6mm -
RS Stock No. 165-2633
Mfr. Part No.BPW41N
BrandVishay
$0.593
Each (In a Bag of 1000)
units
Infrared 950nm Side Looker Through Hole 2 - Si 870nm 1050nm - 5mm 3mm 6.4mm -
RS Stock No. 627-8366
Mfr. Part No.VTB8440BH
$7.37
Each
units
Visible Light 580nm Ceramic Through Hole 2 - Si 330nm 720nm - - - 7.87mm -
RS Stock No. 564-021
Mfr. Part No.OSD5.8-7Q
BrandCentronic
$53.96
Each
units
Infrared, Ultraviolet 340nm TO-39 Through Hole 2 - Si 1100nm 190nm - 9mm 9mm 6.6mm -
RS Stock No. 654-8643
Mfr. Part No.SFH 229
$0.956
Each (In a Pack of 10)
units
Infrared, Ultraviolet, Visible Light 860nm T-1 Through Hole 2 - Si 380nm 1100nm - 4mm 3mm 5.2mm -
RS Stock No. 165-6113
Mfr. Part No.VEMD10940F
BrandVishay
$0.146
Each (On a Reel of 3000)
units
Infrared 920nm - Surface Mount 2 - Si 830nm 950nm - 3mm 2mm 1mm -
RS Stock No. 564-037
Mfr. Part No.OSD 35-7X CQ
BrandCentronic
$115.04
Each
units
Ultraviolet 340nm - Through Hole - - Si 194nm 400nm - - - 8mm -
RS Stock No. 177-5571
Mfr. Part No.PIN-SPOT-4D
$120.318
Each (In a Tray of 5)
units
- 970nm TO-5 Through Hole 5 - Si 350nm 1100nm - - - 3.61mm -
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