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. 161-2054
Mfr. Part No.VEMD5060X01
BrandVishay
HK$5.06
Each (On a Reel of 1000)
units
Infrared 820nm QFN Surface Mount 4 - Si 350nm - 30ns 5mm 4mm 0.9mm -
RS Stock No. 161-2062
Mfr. Part No.VEMD6160X01
BrandVishay
HK$4.418
Each (On a Reel of 3000)
units
- 840nm 1206 Surface Mount 3 - Si 700nm - 50ns 4mm 2mm 1.05mm -
RS Stock No. 176-4202
Mfr. Part No.SFH 2700
HK$3.523
Each (In a Pack of 20)
units
Infrared 1100 Chip LED Surface Mount 2 - Si 300nm 1100nm 0.12µs 2mm 1.25mm 0.8 -
RS Stock No. 699-7604
Mfr. Part No.BPV22NF
BrandVishay
HK$7.238
Each (In a Pack of 5)
units
Infrared 940nm Side Looker Through Hole 2 - Si 790nm 1050nm - 4.5mm 5mm 6mm -
RS Stock No. 183-7165
Mfr. Part No.UV-035DQC
HK$729.75
Each
units
Ultraviolet 980nm Ceramic Through Hole 2 - Si - - - 0.4in - 0.08in -
RS Stock No. 768-9391
Mfr. Part No.VBP104FASR
BrandVishay
HK$4.416
Each (In a Bag of 5)
units
Infrared 950nm Reverse Gullwing Surface Mount 2 - Si 780nm 1050nm - 4.4mm 3.9mm 1.2mm -
RS Stock No. 176-9780
Mfr. Part No.FCI-InGaAs-75
HK$253.35
Each
units
- 1700nm TO-46 Through Hole 3 - InGaAs 900nm 1700nm 0.2 (Maximum)ns - - 3.75mm -
RS Stock No. 124-7159
Mfr. Part No.S5972
HK$82.92
Each
units
Infrared, Visible Light 800nm TO-18 Through Hole 3 - Si 320nm 1000nm - - - 3.6mm -
RS Stock No. 710-3828
Mfr. Part No.TEMD5010X01
BrandVishay
HK$11.82
Each (In a Pack of 5)
units
Infrared, Visible Light 940nm - Surface Mount 4 - Si 430nm 1100nm - 4.2mm 5mm 1.08mm -
RS Stock No. 146-1423
Mfr. Part No.BPW24R
BrandVishay
HK$20.822
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 -
RS Stock No. 183-7155
Mfr. Part No.PIN-SPOT2DMI
HK$151.00
Each
units
- 970nm TO-18 Through Hole 3 - Si 350nm 1100nm - - - 0.14in -
RS Stock No. 2508662139
Mfr. Part No.SLD-70BG2A
HK$77.13
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2508662319
Mfr. Part No.SLD-68EBG1A
BrandSilonex
HK$115.64
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2508662094
Mfr. Part No.SLD-68HL1A
BrandSilonex
HK$41.44
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2508662189
Mfr. Part No.SLD-70IR2A
HK$106.68
Each
units
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