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. 912-8564
Mfr. Part No.SFH 213 FA
HK$2.83
Each (In a Bag of 1000)
units
Infrared 900nm - Through Hole 2 - Si 750nm 1100nm - 5.9mm 5mm 9mm -
RS Stock No. 654-8895
Mfr. Part No.SFH 213 FA
HK$6.928
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. 195-697
Mfr. Part No.SFH 203 FA
HK$6.73
Each
units
Infrared 900nm T-1 3/4 Through Hole 2 - Si 800nm 1100nm - 5.9mm 5.9mm 9mm -
RS Stock No. 913-3285
Mfr. Part No.SFH 2701
HK$2.426
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. 654-8671
Mfr. Part No.SFH 203 P
HK$6.456
Each (In a Pack of 5)
units
Infrared, Visible Light 850nm T-1 3/4 Through Hole 2 - Si 400nm 1100nm - 5.9mm 5mm 5mm -
RS Stock No. 177-6006
Mfr. Part No.SFH 203 P
HK$2.65
Each (On a Tape of 1000)
units
Infrared, Visible Light 850nm - Through Hole 2 - Si 400nm 1100nm - 5.9mm 5mm 5mm -
RS Stock No. 168-5312
Mfr. Part No.SFH 206 K
HK$3.98
Each (On a Tape of 1000)
units
Infrared, Visible Light 850nm - Through Hole 2 - Si 400nm 1100nm - 5.1mm 4.1mm 6.9mm -
RS Stock No. 654-8659
Mfr. Part No.SFH 206 K
HK$5.21
Each (In a Pack of 5)
units
Infrared, Visible Light 850nm T-1 3/4 Through Hole 2 - Si 400nm 1100nm - 5.1mm 4.1mm 6.9mm -
RS Stock No. 177-5579
Mfr. Part No.FCI-INGAAS-Q3000
HK$4,365.448
Each (In a Tray of 5)
units
- 1550nm TO-8 Through Hole 8 - InGaAs 1100nm 1620nm - - - 6.6mm -
RS Stock No. 145-1980
Mfr. Part No.TEFD4300
BrandVishay
HK$1.969
Each (In a Bag of 1000)
units
Infrared 950nm - Through Hole 2 - Si 350nm 1120nm - - - 4.5mm -
RS Stock No. 168-5299
Mfr. Part No.SFH 203
HK$1.95
Each (On a Tape of 1000)
units
Infrared, Visible Light 850nm - Through Hole 2 - Si 400nm 1100nm - 5.9mm 4.8mm 9mm -
RS Stock No. 710-3847
Mfr. Part No.TEMD6200FX01
BrandVishay
HK$6.755
Each (In a Pack of 10)
units
Visible Light 540nm 0805 Surface Mount 2 - - 430nm 610nm - 2mm 1.25mm 0.85mm -
RS Stock No. 773-0418
Mfr. Part No.TEFD4300
BrandVishay
HK$3.834
Each (In a Bag of 10)
units
Infrared 950nm T-1 Through Hole 2 - Si 350nm 1120nm - - - 4.5mm -
RS Stock No. 848-6272
Mfr. Part No.FCI-InGaAs-Q3000
HK$3,062.99
Each
units
- 1550nm TO-8 Through Hole 8 - InGaAs 1100nm 1620nm - - - 6.6mm -
RS Stock No. 165-2707
Mfr. Part No.TEMD6200FX01
BrandVishay
HK$2.537
Each (On a Reel of 3000)
units
Visible Light 540nm 0805 Surface Mount 2 - - 430nm 610nm - 2mm 1.25mm 0.85mm -
RS Stock No. 654-8154
Mfr. Part No.SFH 203
HK$4.028
Each (In a Pack of 5)
units
Infrared, Visible Light 850nm T-1 3/4 Through Hole 2 - Si 750nm 1100nm - 5.9mm 4.8mm 9mm -
RS Stock No. 699-7610
Mfr. Part No.BPW41N
BrandVishay
HK$6.868
Each (In a Pack of 5)
units
Infrared 950nm Side Looker Through Hole 2 - Si 870nm 1050nm - 5mm 3mm 6.4mm -
RS Stock No. 708-2813
Mfr. Part No.BPW21R
BrandVishay
HK$88.42
Each
units
Visible Light 565nm TO-5 Through Hole 2 - Si 420nm 675nm - 9.1mm 9.1mm 3.1mm -
RS Stock No. 177-7627
Mfr. Part No.BPW21R
BrandVishay
HK$88.633
Each (In a Box of 500)
units
Visible Light 565nm TO-5 Through Hole 2 - Si 420nm 675nm - 9.1mm 9.1mm 3.1mm -
RS Stock No. 708-2804
Mfr. Part No.BPW20RF
BrandVishay
HK$42.82
Each
units
Infrared, Visible Light 920nm TO-5 Through Hole 2 - Si 400nm 1100nm - 9.1mm 9.1mm 3.1mm -
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