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What is an Optocoupler?

An optical coupler, also called opto-isolator, optocoupler, opto coupler, photocoupler or optical isolator, is a passive optical component that can combine or split transmission data (optical power) from optical fibers. It is an electronic device which is designed to transfer electrical signals by using light waves in order to provide coupling with electrical isolation between its input and output. The main purpose of an optocoupler is to prevent rapidly changing voltages or high voltages on one side of a circuit from distorting transmissions or damaging components on the other side of the circuit. An optocoupler contains a light source often near an LED which converts electrical input signal into light, a closed optical channel and a photosensor, which detects incoming light and either modulates electric current flowing from an external power supply or generates electric energy directly. The sensor can either be a photoresistor, a silicon-controlled rectifier, a photodiode, a phototransistor or a triac.

Types of Optocouplers

There are many different kinds of optocouplers and at Future Electronics we stock many of the most common types categorized by number of channels, operating temperature, output voltage, isolation voltage, packaging type and current transfer ratio (CTR). The parametric filters on our website can help refine your search results depending on the required specifications.

The most common sizes for maximum output voltage are 30 V, 70 V and 80 V. We also carry optocouplers with a maximum output voltage up to 80 kV. The maximum operating temperature can range from 70 oC to 150 oC, with the most common opto coupler chips having a maximum operating temperature of 100 oC.

Optocouplers from Future Electronics

Future Electronics has a full selection of optocouplers from several manufacturers that can be used for optocoupler circuits such as an analog optocoupler, fast optocoupler, linear optocoupler, high speed optocoupler, 4n35 optocoupler, 4n25 optocoupler, 4n26 optocoupler, 4n28 optocoupler, 4n49 optocoupler, 4n32 optocoupler, ac input optocoupler, quad optocoupler, optical optocoupler, high voltage optocoupler or any other opto couplers or opto coupler circuit. Simply choose from the optocoupler technical attributes below and your search results will quickly be narrowed to match your specific optocoupler application needs.

If you have a preferred brand, we deal with several manufacturers such as California Eastern Lab, Avago Technologies, Fairchild, Vishay or Sharp, among other manufacturers. You can easily refine your optocoupler product search results by clicking your preferred optocoupler brand below from our list of manufacturers.

Choosing the Right Special Function Converter:

When you are looking for the right special function converters, you can filter the results by various attributes with the FutureElectronics.com parametric search: by Resolution (8 b, 12 b, 13 b, 16 b, …), Supply Voltage (up to 40V) and Number of Channels (from 1 to 8 channels) to name a few. You will be able to find the right special function converter chip for any of your circuits.

Applications for Optocouplers:

Photoresistor-based opto-isolators are the slowest type of optocouplers, but also the most linear isolators and are used in the audio and music industry. Most opto-isolators available use bipolar silicon phototransistor sensors and reach medium data transfer speed, which is enough for applications like electroencephalography. High speed opto-isolators are used in computing and communications applications. Other industrial applications include photocopiers, industrial automation, professional light measurement instruments and auto-exposure meters.

Choosing the Right Optocoupler:

When you are looking for the right optocouplers, with the FutureElectronics.com parametric search, you can filter the results by various attributes: by Minimum CTR (0.36%, 20%, 50%, 100%, 500%, …), Number of Channels (1, 2, 3, 4) and Maximum Operating Temperature (from 70 oC to 150 oC) to name a few. You will be able to find the right chip for your optocoupler circuit such as a high speed optocoupler, analog optocoupler, fast optocoupler, ac input optocoupler, quad optocoupler, linear optocoupler, 4n25 optocoupler, 4n26 optocoupler, 4n28 optocoupler, 4n32 optocoupler, 4n35 optocoupler, 4n49 optocoupler, optical optocoupler, high voltage optocoupler or any other opto couplers or opto coupler circuits.

Optocouplers in Production Ready Packaging or R&D Quantities

If the quantity of optocouplers required is less than a full reel, we offer customers many of our programmable optocoupler products in tube, tray or individual quantities that will avoid unneeded surplus.

In addition, Future Electronics offers clients a unique bonded inventory program that is designed to eliminate potential problems that could arise from an unpredictable supply of products containing raw metals and products with long or erratic lead times. Talk with your nearest Future Electronics branch and find out more on how you and your company can avoid possible shortages.



Optocouplers by Primary Attributes:

By No of Channels





By Operating Temp-Max





Featured Optocoupler Products


Manufacturer Part Number Description
Avago Technologies HCPL-0314-500E SO-8 Surface Mount Single Channel 3750 Vrms 0.4 A IGBT Gate Drive Optocoupler
Avago Technologies HCPL-0701-500E SO8 SMT Single Channel 3750 Vrms Min 400% CTR 100 KBd High Gain Optocoupler
Avago Technologies HCPL-2232-500E DIP8 SMT Gull Wing Dual Channel 3750 Vrm Hi Speed 5 MBd Logic Gate Optocoupler
Avago Technologies HCPL-7800-500E DIP8 Surface Mount Single Channel 3750 Vrm 100 kHz Bandwidth Isolation Amplifer
Avago Technologies HCPL-2531-500E DIP8 SMT Gull Wing Dual Channel 3750 Vrm High Speed 1 MBd Optocoupler
California Eastern Lab PS2702-1-F3-A PS2702 Series Single Ch 40 V 3750 Vrms Darlington Photocoupler - SOIC-4
California Eastern Lab PS2705-1-F3-A PS2705 Series Single Channel 40 V 3750 Vrms AC In Photocoupler - SOIC-4
California Eastern Lab PS2701-1-F3-A PS2701 Series Single Channel 40 V 3750 Vrms High Isolation Photocoupler - SOIC-4
California Eastern Lab PS2801-1-F3-A PS2801 Series Single Channel 80 Vce 2500 Vrms Photocoupler - SSOP-4
California Eastern Lab PS2505-1-A PS2505 Series Single Ch 80 Vce 5000 Vrms AC Input Response Photocoupler - DIP-4
California Eastern Lab PS2501AL-1-F3-W-A PS2501 Series Single Channel 80 Vce 5000 Vrms Photocoupler - SOIC-4
Fairchild MOC3023SR2M DIP6 SMT 1 Channel 400 V 7500 V (Pk) Random Phase Triac Optoisolator
Fairchild MOC3063SR2M DIP6 SMT 1 Channel 600 V 7500 V (Pk) Zero Cross Phototriac Driver Optocoupler
Fairchild FOD817A DIP4 Through Hole Single Channel 70 V 5000 Vrms Phototransistor Optocoupler
Fairchild MOCD217R2M SOIC8 SMT Dual Channel 30 V 2500 Vrms Phototransistor Optocoupler
Fairchild MOCD207M SOIC8 SMT Dual Channel 70 V 2500 Vrms Phototransistor Optocoupler
Fairchild 4N35M DIP6 Through Hole Single Channel 30 V 7500 VAC (Pk) Phototransistor Optocoupler
Fairchild H11AA1M DIP6 Through Hole Single Channel 30 V 7500 VAC (Pk) Phototransistor Optocoupler
Fairchild CNY17F2M DIP6 Through Hole Single Channel 70 V 7500 Vrms Phototransistor Optocoupler
Fairchild H11L1M DIP6 Through Hole Single Channel High Speed 1 MHz 7500 VAC (Pk) Optocoupler
Vishay SFH6156-3T SFH6156 Series Single Channel 70V 5300Vrms SMT Phototransistor Optocoupler DIP-4
Vishay IL420 IL420 Series Single Channel 600 V 5300 Vrms Phototriac Optocoupler - DIP-6
Vishay SFH6732 SFH6732 Series Dual Channel 15 V 5300 Vrms SMT High Speed Optocoupler - DIP-8
Vishay TCMT4100 TCMT4100 Series Quad Channel 70V 3750 Vrms Phototransistor Optocoupler - SOIC-16
Vishay TCMT1600 TCMT1600 Series Single Channel 70V 3750Vrms Phototransistor Optocoupler - SOIC-4

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