Optocouplers / Photocouplers

Optocouplers are a type of isolator that use a low-power optical signal to transmit one signal from one circuit to another independent circuit. Optocouplers are comprised of an infrared LED light source and an integrated photo detector which usually consists of a photodiode and detector circuit. This optical link or coupling provides electrical isolation between the two circuits which makes the trouble shooting and reliability of circuits more straightforward. These devices are often used to provide electrical isolation between digital signals on the same board, but they are also commonly used in medical and industrial instruments, motor control systems, and signal conditioning circuits. Optocouplers have very high input-to-output isolation voltage and low capacitance, which makes them suitable for signal transmission in high speed applications. Additionally, they manage the call back current of the circuit they are connecting, allowing them to protect against overloads.
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SFH618A-3


Transistor Output Optocouplers RECOMMENDED ALT 78-VO618A-3
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Vishay 3860
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AUD 0.5237
Multiples of: 1

4N33TVM


Optoisolator Darlington with Base Output 4170Vrms 1 Channel 6-DIP
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ON Semiconductor 3858
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AUD 0.4167
Multiples of: 1

TLP785(GB-TP6,F


Transistor Output Optocouplers Photocoupler 80V 60mA 5000 Vrms
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Toshiba 3849
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AUD 0.2928
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PS2502L-1-F3-A


Transistor Output Optocouplers OPTOCOUPLER 4-PIN DIP
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Renesas 3846
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AUD 0.6635
Multiples of: 1

PS2841-4A-F3-AX


Optocoupler DC-IN 4-CH Transistor DC-OUT 12-Pin Ultra SSOP T/R
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Renesas 3845
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AUD 4.006
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ORPC-817SB-TP-F


SOP-4 Optocouplers - Phototransistor Output ROHS
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Orient 3841
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AUD 0.0356
Multiples of: 10

BPC-817S


Optocouplers SMD-4 RoHS
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Bright LED 3841
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AUD 0.0564
Multiples of: 10

FOD817C300


Optocoupler; THT; Channels:1; Out: transistor; Uinsul:5kV; Uce:70V
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ON Semiconductor 3838
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AUD 0.1675
Multiples of: 1

PS2801-1-F3-A/L


SOP-4 Optocouplers - Phototransistor Output ROHS
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Renesas 3837
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AUD 0.2704
Multiples of: 5

APV1121S


Photodiode Output Optocouplers 2500VAC 8.7V DRIVER
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Panasonic 1617
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AUD 1.6784
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