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. 165-2428
Mfr. Part No.BPW34
BrandVishay
£0.337
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
£0.754
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. 177-7627
Mfr. Part No.BPW21R
BrandVishay
£6.306
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. 708-2813
Mfr. Part No.BPW21R
BrandVishay
£10.56
Each
Units
Visible Light 565nm TO-5 Through Hole 2 Si 420nm 675nm - 9.1mm 9.1mm 3.1mm 50 ° -
RS Stock No. 165-2577
Mfr. Part No.BPV10NF
BrandVishay
£0.294
Each (In a Bag of 1000)
Units
Infrared 940nm - Through Hole 2 Si 790nm 1050nm - 5.75mm 5.75mm 8.6mm 20 ° -
RS Stock No. 699-7607
Mfr. Part No.BPV10NF
BrandVishay
£0.596
Each (In a Pack of 10)
Units
Infrared 940nm T-1 3/4 Through Hole 2 Si 790nm 1050nm - 5.75mm 5.75mm 8.6mm 20 ° -
RS Stock No. 165-6969
Mfr. Part No.BPV23NF
BrandVishay
£0.303
Each (In a Bag of 1000)
Units
Infrared 940nm - Through Hole 2 Si 790nm 1050nm - - - - ±60 ° -
RS Stock No. 773-3984
Mfr. Part No.BPV23NF
BrandVishay
£0.875
Each (In a Bag of 2)
Units
Infrared 940nm - Through Hole 2 Si 790nm 1050nm - - - - ±60 ° -
RS Stock No. 146-1423
Mfr. Part No.BPW24R
BrandVishay
£2.21
Each (In a Bag of 1000)
Units
Infrared, Visible Light 900nm TO-18 Through Hole 2 Si 600nm 1050nm - 5.5mm 5.5mm 6.15mm 12 ° -
RS Stock No. 708-2816
Mfr. Part No.BPW24R
BrandVishay
£3.93
Each
Units
Infrared, Visible Light 900nm TO-18 Through Hole 2 Si 600nm 1050nm - 5.5mm 5.5mm 6.15mm 12 ° -
RS Stock No. 710-3838
Mfr. Part No.TEMD5510FX01
BrandVishay
£1.908
Each (In a Pack of 5)
Units
Visible Light 540nm SMD Surface Mount 2 Si 430nm 610nm - 5mm 4.25mm 1.08mm 65 ° -
RS Stock No. 919-0739
Mfr. Part No.TEMD5510FX01
BrandVishay
£0.725
Each (On a Reel of 1500)
Units
Visible Light 540nm SMD Surface Mount 2 Si 430nm 610nm - 5mm 4.25mm 1.08mm 65 ° -
RS Stock No. 919-5801
Mfr. Part No.VBPW34S
BrandVishay
£0.339
Each (On a Reel of 1000)
Units
Infrared, Visible Light 940nm GW Surface Mount 2 Si 430nm 1100nm - 4.4mm 3.9mm 1.2mm ±65 ° -
RS Stock No. 768-9405
Mfr. Part No.VBPW34S
BrandVishay
£0.994
Each (In a Bag of 5)
Units
Infrared, Visible Light 940nm GW Surface Mount 2 Si 430nm 1100nm - 4.4mm 3.9mm 1.2mm ±65 ° -
RS Stock No. 773-0418
Mfr. Part No.TEFD4300
BrandVishay
£0.484
Each (In a Bag of 10)
Units
Infrared 950nm T-1 Through Hole 2 Si 350nm 1120nm - - - 4.5mm ±20 ° -
RS Stock No. 145-1980
Mfr. Part No.TEFD4300
BrandVishay
£0.189
Each (In a Bag of 1000)
Units
Infrared 950nm - Through Hole 2 Si 350nm 1120nm - - - 4.5mm ±20 ° -
RS Stock No. 165-2707
Mfr. Part No.TEMD6200FX01
BrandVishay
£0.411
Each (On a Reel of 3000)
Units
Visible Light 540nm 0805 Surface Mount 2 - 430nm 610nm - 2mm 1.25mm 0.85mm 60 ° -
RS Stock No. 710-3847
Mfr. Part No.TEMD6200FX01
BrandVishay
£0.653
Each (In a Pack of 10)
Units
Visible Light 540nm 0805 Surface Mount 2 - 430nm 610nm - 2mm 1.25mm 0.85mm 60 ° -
RS Stock No. 145-2618
Mfr. Part No.BPW20RF
BrandVishay
£3.25
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
£5.51
Each
Units
Infrared, Visible Light 920nm TO-5 Through Hole 2 Si 400nm 1100nm - 9.1mm 9.1mm 3.1mm 50 ° -