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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Transistor Output Optocouplers Phototransistor Out Dual CTR 100-200%
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Vishay 5639
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AUD 0.6698
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TLP2766F(D4-TP,F)


SDIP-6 Logic Output Optoisolators ROHS
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Toshiba 883
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AUD 2.8598
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CNY17F-4X009T


Transistor Output Optocouplers Phototransistor Out Single CTR 160-320%
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Vishay 880
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AUD 0.4137
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4N25-V


Optocoupler; THT; Ch: 1; OUT: transistor; Uinsul: 2.5kV; Uce: 30V
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Lite-On 879
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AUD 0.1734
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DPC6137S-TR


Logic Output Opto-couplers Photo Coupler SL-8 T and R 1K
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Diodes Incorporated 877
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AUD 0.3583
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4N30SR2M


Optoisolator Darlington with Base Output 4170Vrms 1 Channel 6-SMD
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ON Semiconductor 876
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AUD 0.4384
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CNY17-4X001


Vishay Semiconductors Transistor Output Optocouplers Phototransistor Out Single CTR 160-320%
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Vishay 875
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AUD 0.3865
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FOD3184SV


Logic Output Opto-couplers 3A Out, Hi-Speed Gate Drvr Optocouplr
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ON Semiconductor 875
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AUD 2.4095
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SFH628A-3X001


Transistor Output Optocouplers Phototransistor Out AC-In CTR>100-320%
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Vishay 852
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AUD 0.7027
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K827PH


Transistor Output Optocouplers Phototransistor Out Dual CTR 50-600%
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Vishay 826
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AUD 1.3512
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