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. 564-021
Mfr. Part No.OSD5.8-7Q
BrandCentronic
HK$386.73
Each
units
Infrared, Ultraviolet 340nm TO-39 Through Hole 2 - Si 1100nm 190nm - 9mm 9mm 6.6mm -
RS Stock No. 919-0988
Mfr. Part No.VBPW34SR
BrandVishay
HK$2.864
Each (On a Reel of 1000)
units
Infrared, Visible Light 940nm Reverse Gullwing Surface Mount 2 - Si 430nm 1100nm - 4.4mm 3.9mm 1.2mm -
RS Stock No. 654-8788
Mfr. Part No.SFH 2505
HK$4.248
Each (In a Pack of 5)
units
Infrared, Visible Light 850nm SMR Through Hole 2 - Si 400nm 1100nm - 6mm 4.8mm 7.7mm -
RS Stock No. 168-5319
Mfr. Part No.SFH 235 FA
HK$3.306
Each (In a Bag of 1000)
units
Infrared 900nm - Through Hole 2 - Si 740nm 1120nm - 5.1mm 3.1mm 7.2mm -
RS Stock No. 654-8249
Mfr. Part No.SFH 2430-Z
HK$8.418
Each (In a Pack of 5)
units
Infrared, Visible Light 570nm DIP Surface Mount 2 - Si 400nm 900nm - 4.5mm 4mm 1.2mm -
RS Stock No. 708-0570
Mfr. Part No.SFH 2400 FAR
HK$5.154
Each (In a Pack of 5)
units
Infrared 900nm DIP Surface Mount 3 - Si 750nm 1100nm - - - - -
RS Stock No. 912-8306
Mfr. Part No.BPX 65
HK$25.13
Each (In a Tray of 120)
units
Infrared 850nm TO-18 Through Hole 2 - Si 350nm 1100nm 0.012µs - 5.5mm - -
RS Stock No. 699-7701
Mfr. Part No.VEMD2020X01
BrandVishay
HK$2.394
Each (In a Pack of 20)
units
Infrared 940nm Subminiature Surface Mount 2 - Si 750nm 1050nm - 2.3mm 2.3mm 2.77mm -
RS Stock No. 912-8554
Mfr. Part No.SFH 2505
HK$2.613
Each (On a Reel of 1000)
units
Infrared, Visible Light 850nm SMR Through Hole 2 - Si 400nm 1100nm - 6mm 4.8mm 7.7mm -
RS Stock No. 165-2577
Mfr. Part No.BPV10NF
BrandVishay
HK$3.13
Each (In a Bag of 1000)
units
Infrared 940nm - Through Hole 2 - Si 790nm 1050nm - 5.75mm 5.75mm 8.6mm -
RS Stock No. 654-8902
Mfr. Part No.SFH 213
HK$7.28
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 -
RS Stock No. 415-5722
Mfr. Part No.S1223-01
HK$71.88
Each
units
Infrared, Ultraviolet, Visible Light 960nm TO-5 Through Hole 2 - Si 320nm 1100nm - 9.1mm 9.1mm 4.1mm -
RS Stock No. 304-346
Mfr. Part No.BPX65
BrandCentronic
HK$60.48
Each
units
Infrared, Ultraviolet, Visible Light 850nm TO-18 Through Hole 2 - Si 350nm 1100nm - 5.6mm 5.6mm 5.5mm -
RS Stock No. 710-3838
Mfr. Part No.TEMD5510FX01
BrandVishay
HK$14.664
Each (In a Pack of 5)
units
Visible Light 540nm SMD Surface Mount 2 - Si 430nm 610nm - 5mm 4.25mm 1.08mm -
RS Stock No. 846-777
Mfr. Part No.OSD5-5T
BrandCentronic
HK$112.18
Each
units
Infrared, Visible Light 900nm TO-5 Through Hole - - Si 430nm 900nm - - - - -
RS Stock No. 168-5425
Mfr. Part No.SFH 2400 FAR
HK$3.73
Each (On a Reel of 2000)
units
Infrared 900nm DIP Surface Mount 3 - Si 750nm 1100nm - - - - -
RS Stock No. 919-0739
Mfr. Part No.TEMD5510FX01
BrandVishay
HK$7.07
Each (On a Reel of 1500)
units
Visible Light 540nm SMD Surface Mount 2 - Si 430nm 610nm - 5mm 4.25mm 1.08mm -
RS Stock No. 912-8520
Mfr. Part No.SFH 2430-Z
HK$5.875
Each (On a Reel of 1500)
units
Infrared, Visible Light 570nm DIP Surface Mount 2 - Si 400nm 900nm - 4.5mm 4mm 1.2mm -
RS Stock No. 768-9414
Mfr. Part No.VBPW34SR
BrandVishay
HK$5.166
Each (In a Bag of 5)
units
Infrared, Visible Light 940nm Reverse Gullwing Surface Mount 2 - Si 430nm 1100nm - 4.4mm 3.9mm 1.2mm -
RS Stock No. 918-9483
Mfr. Part No.VEMD2020X01
BrandVishay
HK$1.835
Each (On a Reel of 6000)
units
Infrared 940nm Subminiature Surface Mount 2 - Si 750nm 1050nm - 2.3mm 2.3mm 2.77mm -
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