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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VOM618A-8X001T


Vishay Semiconductors Transistor Output Optocouplers Phototransistor Out CTR 130-260% 1mA VDE
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Vishay 4765
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AUD 0.22
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MOCD223VM


Fairchild Semiconductor Transistor Output Optocouplers 8-Pin Optocoupler 2Ch Photodarlington
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ON Semiconductor 4764
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AUD 0.6041
Multiples of: 1

FOD420


Triac & SCR Output Optocouplers 600V RANDOM PHASE TRIAC
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ON Semiconductor 4764
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AUD 2.9333
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VO617A-3


Transistor Output Optocouplers RECOMMENDED ALT 782-SFH617A-3
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Vishay 4761
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AUD 0.1729
Multiples of: 1

MOC223R2M


Transistor Output Optocouplers 8pin Optocoupler Photodarlington
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ON Semiconductor 4753
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AUD 0.4208
Multiples of: 1

TLP291(V4GRTP,SE


Transistor Output Optocouplers GaAs Infrared and Photo-Transistor
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Toshiba 4751
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AUD 0.4276
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HCPL-817-30BE


Transistor Output Optocouplers 5000 Vrms 50mA
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Broadcom 4746
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AUD 0.5156
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EL3H7CTA-VG


Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin SSOP T/R
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Everlight 4738
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AUD 0.2467
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HMHA2801


Transistor Output Optocouplers Optocoupler Phototransistor
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ON Semiconductor 4725
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AUD 0.2599
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VO615A-9X006


Transistor Output Optocouplers H.Temp Phototrnstr 200-400% CTR
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Vishay 4722
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AUD 0.1886
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