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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VO615A-3X017T


Vishay Semiconductors Transistor Output Optocouplers Optocoupler SMD4
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Vishay 2151
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AUD 0.1724
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TCLT1106


Transistor Output Optocouplers Phototransistor Out Single CTR 100-300%
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Vishay 2151
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AUD 0.3415
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TLP352(D4-TP1,F)


Logic Output Opto-couplers Photocoupler, Photo IC Output
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Toshiba 2147
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AUD 1.1317
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SFH640-3


Transistor Output Optocouplers Phototransistor Out
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Vishay 2146
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AUD 1.1837
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4N33


Transistor Output Optocouplers Optocouplers
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Everlight 2144
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AUD 0.3678
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Hot FOD8173


Logic Output Optocouplers SSO6 3.3V 10MB
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ON Semiconductor 2143
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AUD 0.9687
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OPI110C


Transistor Output Optocouplers 10KV ISOLATION
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TT Electronics 2143
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AUD 4.0881
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CNY17-3X006


Transistor Output Optocouplers Phototransistor Out Single CTR 100-200%
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Vishay 2141
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AUD 0.3415
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PR3BMF51NSLH


Triac & SCR Output Optocouplers Solid State Relay (SSR)
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Sharp 2141
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AUD 1.0038
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H11G1TVM


Fairchild Semiconductor Transistor Output Optocouplers Hi Volt Photodarling
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ON Semiconductor 2138
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AUD 0.5094
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