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 56260
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AUD 0.6696
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TCMT4600T0


Transistor Output Optocouplers AC Input, Phtotrnstr 80-300% CTR VDE
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Vishay 9279
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AUD 1.397
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APV2121S


Photodiode Output Optocouplers Driver 4-pin SOP Driver 4-pin SOP
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Panasonic 1567
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AUD 1.3231
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TCET1100


Transistor Output Optocouplers Phototransistor Out
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Vishay 1559
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AUD 0.2451
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FOD4108S


Triac & SCR Output Optocouplers Zero-Cross Triac Out Snubberless, 800V
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ON Semiconductor 1538
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AUD 2.4514
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FOD817AS


Transistor Output Optocouplers Opto Phototransistor Output SM-DIP4
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ON Semiconductor 1529
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AUD 0.198
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IL300-DEFG-X001


High Linearity Optocouplers High Gain Wide Bandwidth Linear
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Vishay 1422
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AUD 2.53
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TLP291(TP,SE


Toshiba Transistor Output Optocouplers 50mA 80V Gen Purp 50mA 1 Circuit
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Toshiba 1367
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AUD 0.274
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CNY17-2X007


Transistor Output Optocouplers Phototransistor Out Single CTR 63-125%
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Vishay 1333
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AUD 0.3269
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HCPL-181-06DE


Transistor Output Optocouplers 3750 Vrms 0.2mA
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Broadcom 1006
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AUD 0.394
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