About 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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MOC3063-SMD


MOC3063-M DIP SMD OPTOCOUPLER
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Lite-On 1000
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€ 0.5004
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H11F2


H11F2 OPTOCOUPLER T/HOLE
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ON Semiconductor 340
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€ 2.3483
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747177X


HCPL-060L #1002 PCNCCNPOC#90
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Broadcom 300
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€ 1.268
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879532X


H11AG1 WELWYN - SPECIAL
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ON Semiconductor 245
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€ 0.8611
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717126G


TLP627-2(T) SEMICONDUCTORS
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Toshiba 190
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€ 0.4789
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004194E


4N27 OPTOCOUPLER 6 PIN DIP
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Lite-On 49
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€ 0.6437
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004210D


H11A1 #1202 PCN20020703 DIP
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Vishay 40
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€ 0.1664
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MRF658


IC- MOTOROLANPN VHF RF TRANSISTOR
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Motorola 30
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€ 23.5667
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635549D


TIL187-1 AC-INPUT OPTO CPLR LTB JUN00
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Texas Instruments 28
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€ 0.9169
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PC725V


PC725V OPTOCOUPLER T/HOLE
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Sharp 5
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€ 1.0406
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