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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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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 is applied to the LED, and should remain low even if the voltage is no longer present on the LED. Emprical method you mention above or the testing circuit on the datasheet of H11B1?

Kannan E on July 19, at 9: Images shown is only for representation.

EL Everlight Electronics CO., LTD, EL Datasheet

The LED datasjeet basically a diode, and it should not conduct both ways not get values on the meter both ways. Mihai rl817 February 2, at 5: Muhammad Akhlaq on May 30, at 9: The optocoupler is FL C F, should i just join the emittor and collector pins?

If the input is at 2V DC, then the output resistance should be around — ohms. Hi, First of all thanks for sharing such an useful information. Mihai on November 20, at 1: In my example an ohmmeter is connected at the output, in order to see the change in resistance. Step 2 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.


Here I want to show you how to check if an optocoupler is working. Description EL Phototransistor Photocoupler The EL Phototransistor Photocoupler series of devices each consist of an infrared emitting diodes, optically coupled to a phototransistor detector.

EL817 Datasheet PDF

If you get a value either way or no value at all, then certainly there is a problem with the LED, and you should find another optocoupler. I was referring to the junction resistance. Sign in with Login with Facebook.

The actual product may vary with the picture shown. Thanks for the easy to follow explanation of how to rest an optocoupler.

20pcs/lot EL817A EL817 DIP Technical Data Sheet Photocoupler

Shahid on August 7, at 1: Better check the datasheet for a test circuit. Mohamed on October 9, at 9: The question is which one is the right testing method? EL series of devices are Photo transistor based photo coupler. Any help would be apreciated. Applications of EL Phototransistor Photocoupler: Add to Wish List Compare this Product. Michael on January 21, at 3: The nice thing about standards is that you have so many to choose from. Mihai on March 6, at 2: Mihai on July 16, at 5: These information are very good indeed.


Sanu sebastian on August 19, at 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. An opto-isolator connects input and output sides with a beam of light modulated by input current.

Everlight Optocoupler EL – EL

This common type opto – isolator consists of an LED and a phototransistor in the same package. Thank you for the information… and i have one more clarifications. Viliam on September 7, at 1: I like the way you explain things. How the optocoupler Type SFH acts when the positive line is open. For response time or frequency response data, check the datasheet.

Thx datashset best regards, Geert. Mihai on July 19, at 3: Enter your Email Address here to receive a link to change password. Your email address will not be published. I have two circuits.

El81 depends on the 2nd circuit you are supplying the voltage on collector of the optocoupler, optocoupler will never transfer the voltages of circuit1 to circuit2, it decreases resistance between your supplied voltages at collector and emitter on the input of circuit2. Siroos on October 14, at When Firefox stops working, you fire up Chrome.