The EL series of devices each consist of an infrared emitting diodes .. The specifications in this datasheet may be changed without notice. Everlight EL available from 13 distributors. Explore Optoelectronics on Octopart: the fastest source for datasheets, pricing, specs and availability. EL Add page 2of 9, laser marking content of EVERLIGHT May,16, Add page 9 – FIMKO approved Details, datasheet, quote on part number: EL

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The EL Phototransistor Photocoupler series of devices each consist of an infrared emitting diodes, optically coupled to a phototransistor detector. If the LED is good then we should check the phototransistor, you could measure it with the ohmmeter just like the LED between pins 3 and 4 the emitter and collectorand you should get a high resistance value both ways if the phototransistor is good.

These information are very good indeed. Some features may not work properly. You have JavaScript disabled or are viewing the site on a device that does no support JavaScript.

This common type opto – isolator consists of an LED and a phototransistor in the same package. Mihai on July 19, at 3: Enter your Email Address here to receive a link to change password.

20pcs/lot EL817A EL817 DIP Technical Data Sheet Photocoupler

There is no law governing all things. For response time or frequency response data, check the datasheet.

Sunil on March 3, at 3: Mihai on November 20, at 1: When Firefox stops working, you fire up Chrome. Here I want to show you how to check if an optocoupler is working.


The purpose of an optocoupler is to transfer signals from one circuit to another yet keep them galvanically isolated. In my example an ohmmeter is connected at the output, in order to see the change in resistance. EL series of devices are Photo transistor based photo coupler. Any help would be apreciated.

Mohamed on October 9, at 9: Home appliances, such as fan heaters, etc. Mihai on August 27, at Mihai on March 6, at 2: If the input is at 2V DC, then the output resistance should be around — ohms. System appliances, measuring instruments. Thanks for the easy to follow explanation of how to rest an optocoupler. Please correct the pin numbers in image. Blumen xatasheet October 26, at 7: Better check the datasheet for a test circuit.

It transforms useful input signal into light, sends it across the dielectric channel, captures light on the output side and transforms it back into electric signal. I only have a digital multi datasehet. Add to Wish List Compare this Product. RM Business days.

EL Everlight Electronics CO., LTD, EL Datasheet

If you get a value either way or no value at all, then certainly there is a problem with the LED, and you el8117 find another optocoupler. Sanu sebastian on August 19, at Mihai on July 15, at 8: Opto – isolators prevent high voltages from affecting the system receiving the signal. For the triac pins 4 and 6with no voltage applied to the LED pins 1, 2check with an ohmmeter the resistance between pins 4 and 6, it should be high open circuit or at least greater than 1 megohm both ways, and this resistance should go down lower than ohms when voltage dl817 applied to the LED, and should remain low even if the voltage is no longer present on the LED.


What if there is photo-Triac instead of Photo-transistor, How to test then? I guess, it should work mostly the same as a normal triac. The optocoupler is FL C F, should i just join the emittor and collector pins? The nice thing about standards is that you have so many to choose from.

Sarfaraz on November 8, at 9: Leave a Reply Cancel reply Your email address will not be published.

Hi, The MOC, is a phototriac coupler, meaning that instead of the phototransistor, it dafasheet a phototriac, which is basically a triac with the gate driven by the LED.

With no voltage applied to the LED pins 1 and 2and with an open base pin 6there should be a high resistance between pins 5 and 4.

This site uses Akismet to reduce spam. Enter the code in the box below. Shahid on August 7, at 1: The question is which one is the right testing method? Muhammad Akhlaq on May 30, at 9: Thx and best regards, Geert. The firehose by day and forty beers by night, An engineer may never sleep ep817 still be just as bright.