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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TLP292-4(V4GBTPE


Transistor Output Optocouplers 4ch Transistor opto coupler
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Toshiba 1940
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AUD 2.0548
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IL4108-X017


Triac & SCR Output Optocouplers Phototriac Output, Zero Crossing
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Vishay 1940
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AUD 2.654
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IL4208-X009


Vishay Semiconductors Triac & SCR Output Optocouplers Phototriac Output Low Input Current
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Vishay 1940
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AUD 2.7238
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IL4118-X007


Triac & SCR Output Optocouplers Phototriac Output, Zero Crossing
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Vishay 1940
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AUD 3.7603
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FOD8384V


Fairchild Semiconductor Logic Output Optocouplers
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ON Semiconductor 1940
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AUD 4.7317
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FOD8321V


Logic Output Optocouplers 2.5A Out Gate Drive Optcplr; Optoplanar
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ON Semiconductor 1940
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AUD 4.977
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H11N1SR2M


High Speed Optocouplers Optocoupler LC Schmitt Trigger
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ON Semiconductor 1940
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AUD 5.6862
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FOD2741BSD


Optocoupler; SMD; Channels:1; Out: transistor; Uinsul:5kV; Uce:70V
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ON Semiconductor 1939
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AUD 1.0754
Multiples of: 1

VO2223A


Triac & SCR Output Optocouplers 1 A, DIP-8 package 10-mA input trig crt
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Vishay 1939
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AUD 1.4754
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FOD410SD


Fairchild Semiconductor Triac & SCR Output Optocouplers Black Pkg Zero Cross Snubless Triac Drver
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ON Semiconductor 1939
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AUD 2.8239
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