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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KPC357NT0DTLD


Optocouplers SOP-4_2.54 RoHS
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Cosmo 18842
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AUD 0.1114
Multiples of: 5

EL814S(A)(TU)


Transistor Output Optocouplers Optocoupler Transistor AC Input
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Everlight 15224
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AUD 0.1038
Multiples of: 5

4N25TVM


Transistor Output Optocouplers Optocoupler Phototransistor
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ON Semiconductor 1721
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AUD 0.4399
Multiples of: 1

4N35-X001


Transistor Output Optocouplers Phototransistor Out Single CTR>100%
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Vishay 1714
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AUD 0.4055
Multiples of: 1

ILQ1-X007


Vishay Semiconductors Transistor Output Optocouplers Phototransistor Out Quad CTR > 20%
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Vishay 1714
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AUD 2.0577
Multiples of: 1

UPC817XG-D04-T


35V 5000V 50mA 0.1V@1mA,20mA 1 6V 1.2V DC DIP-4 Optocouplers - Phototransistor Output ROHS
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Unisonic 1678
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AUD 0.0731
Multiples of: 5

6N138M


DIP-8 Optocouplers - Logic Output ROHS
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Youtai 1649
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AUD 0.3028
Multiples of: 5

PC817X3NSZ1B


Transistor Output Optocouplers OPTOISOLATOR 5KV TRANS DIP, Optoisolator Transistor Output 1 Channel
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Sharp 1463
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AUD 0.3176
Multiples of: 1

MPS2501L-1-L


SMD-4P Transistor, Photovoltaic Output Optoisolators ROHS
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MSKSEMI 1387
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AUD 0.1632
Multiples of: 5

SFH617A-4


Transistor Output Optocouplers RECOMMENDED ALT 78-VO617A-4
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Vishay 1222
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AUD 0.4003
Multiples of: 1

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