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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TCMT1119


Transistor Output Optocouplers Phototransistor 200-400% CTR 5mA VDE
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Vishay 3705
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AUD 0.2879
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Hot FOD2741BSV


Fairchild Semiconductor Transistor Output Optocouplers Error amplifier Optocoupler
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ON Semiconductor 908
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AUD 0.8355
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HCPL-814-56AE


Avago Technologies Transistor Output Optocouplers 5000 Vrms 20% CTR
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Broadcom 905
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AUD 0.4179
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PC3SD21YXPKH


Optotriac; 5kV; zero voltage crossing driver; Gull wing 6
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Sharp 905
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AUD 0.8776
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6N137-000E


High Speed Optocouplers 10 Mb/s 3750Vrms
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Broadcom 867
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AUD 1.2537
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PS2801-1-A


Transistor Output Optocouplers Hi-Iso Photo 1-Ch
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CEL 863
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AUD 0.8358
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6N138M


High Speed Optocouplers Low Input Crrnt High Gain Split Darlingtn
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ON Semiconductor 766
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AUD 1.1873
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Hot H11D3M


Optocoupler; THT; Channels:1; Out: transistor; Uinsul:4.17kV; DIP6
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ON Semiconductor 445
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AUD 0.5078
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EL3052S(TA)


60mA 600V 1.18V SMD-6P Triac, SCR Output Optoisolators ROHS
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Everlight 368
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AUD 0.2326
Multiples of: 5

LTV-827


Optocoupler; THT; Channels:2; Out: transistor; Uinsul:5kV; Uce:35V
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Lite-On 203
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AUD 0.2013
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