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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Hot MOC3081M


Optotriac; 5.3kV; Uout:800V; zero voltage crossing driver; DIP6
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ON Semiconductor 20381
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AUD 0.482
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CNY17-4-300E


Transistor Output Optocouplers 5000 Vrms 0.3mA
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Broadcom 652
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AUD 0.7752
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CNY17-1S-TA1


Optocoupler; SMD; Channels:1; Out: transistor; Uinsul:5kV; Uce:70V
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Lite-On 649
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AUD 0.2131
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FOD3184TSR2V


Fairchild Semiconductor Logic Output Optocouplers High Speed 3A OUT MOSFETIGBT GateDrvr
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ON Semiconductor 647
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AUD 2.2164
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H11F3SR2VM


Fairchild Semiconductor MOSFET Output Optocouplers FET Bilateral analog
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ON Semiconductor 646
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AUD 0.8833
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HCPL-3020-000E


Logic Output Opto-couplers 0.2A IGBT Gate Drive
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Broadcom 646
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AUD 1.6925
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VOT8123AB-V


Triac & SCR Output Optocouplers Non-Zero 800V Vrdm SMD6; 5000V Vrms
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Vishay 645
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AUD 0.4827
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SFH617A-3X016


Transistor Output Optocouplers RECOMMENDED ALT 78-VO617A-3X016
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Vishay 644
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AUD 0.4075
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HCPL-817-30AE


Transistor Output Optocouplers 5000 Vrms 50mA
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Broadcom 642
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AUD 0.491
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LTV-333J-TP1


SMD Optocouplers - Phototransistor Output ROHS
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Lite-On 639
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AUD 2.916
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