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. 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 -
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. 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. 654-9034
Mfr. Part No.SFH 235 FA
HK$5.344
Each (In a Pack of 5)
units
Infrared 900nm T-1 3/4 Through Hole 2 - Si 740nm 1120nm - 5.1mm 3.1mm 7.2mm -
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. 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. 184-6978
Mfr. Part No.1541201EEA400
HK$2.259
Each (On a Reel of 3000)
units
Infrared 940nm 1206 Surface Mount 2 - Si 700nm 1100nm - 3.2mm 1.6mm 1.1mm -
RS Stock No. 848-6235
Mfr. Part No.PIN-SPOT-4D
HK$322.22
Each
units
- 970nm TO-5 Through Hole 5 - Si 350nm 1100nm - - - 3.61mm -
RS Stock No. 848-6301
Mfr. Part No.APD05-8-150-T52L
HK$606.62
Each
units
Infrared 800nm TO-52 Through Hole 3 - Si 600nm - - - - 3.8mm -
RS Stock No. 654-8069
Mfr. Part No.SFH 205 FA
HK$6.264
Each (In a Pack of 5)
units
Infrared 900nm T-1 3/4 Through Hole 2 - Si 740nm 1100nm - 5.1mm 4.1mm 6.9mm -
RS Stock No. 183-7160
Mfr. Part No.PIN-SPOT4DMI
HK$316.35
Each
units
- 970nm TO-5 Through Hole 3 - Si 350nm 1100nm - - - 0.11in -
RS Stock No. 183-7119
Mfr. Part No.OSD1-0
HK$112.673
Each (In a Tray of 10)
units
Infrared 900nm TO-18 Through Hole 2 - Si 350nm 1100nm - - - 0.2in -
RS Stock No. 161-2052
Mfr. Part No.VEMD1160X01
BrandVishay
HK$2.44
Each (On a Reel of 3000)
units
- 840nm 0805 Surface Mount 2 - Si 700nm - 80ns 2mm 1.25mm 0.85mm -
RS Stock No. 826-4625
Mfr. Part No.IS471FE
BrandSharp
HK$17.176
Each (In a Pack of 5)
units
Infrared 800 → 900nm - - 4 - - 700nm 1150nm - - - - -
RS Stock No. 185-9622
Mfr. Part No.MICROFJ-30020-TSV-TR1
HK$505.49
Each
units
- - SMT Surface Mount 4 - Si 200nm 900nm - 3.16mm 3.16mm 0.46mm -
RS Stock No. 740-5064
Mfr. Part No.NJL6201R-1-TE1
HK$8.90
Each (In a Pack of 5)
units
- 800nm COBP Surface Mount 2 - - - - 5ns 3.6mm 1.8mm 1.16mm -
RS Stock No. 184-7295
Mfr. Part No.1540051EC3590
HK$3.491
Each (In a Pack of 25)
units
Infrared 940nm 5 Through Hole 2 - Si 700nm 1100nm - 5mm 5mm 8.7mm -
RS Stock No. 177-5563
Mfr. Part No.PIN-UV-100DQC
HK$1,511.145
Each (In a Box of 2)
units
Ultraviolet 980nm Ceramic Through Hole 2 - Si 190nm 1100nm - 16.51mm 14.99mm 2.03mm -
RS Stock No. 185-9624
Mfr. Part No.MICROFJ-30035-TSV-TR1
HK$505.49
Each
units
- - SMT Surface Mount 4 - Si 200nm 900nm - 3.16mm 3.16mm 0.46mm -
RS Stock No. 654-7892
Mfr. Part No.BPW 34 FAS-Z
HK$5.786
Each (In a Pack of 5)
units
Infrared 880nm DIP Surface Mount 2 - Si 730nm 1100nm - 4.5mm 4mm 1.2mm -