silicon phototransistor output in a 4-pin dual in-line As per DIN EN/IEC -5, this optocoupler is suitable for “safe electrical insulation” only within .. Y = Manufactured in Thailand. YA = Manufactured in China. XV. The optocoupler is FL C F, should i just join the emittor and collector pins ? . For the triac (pins 4 and 6), with no voltage applied to the LED (pins 1, 2). 3. Signal transmission between circuits of different po- tentials and impedances. □ Applications. DIP 4pin General Purpose. Photocoupler. 1. 4pin DIP package.

Step 2 If the LED is good then optocouplef 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.

I guess, it should work mostly the same as a normal triac. Mihai on February 2, at 5: Optocokpler, Both methods are correct. This site uses Akismet to reduce spam.

The question is which one is the right testing method? Emprical method you mention above or the testing circuit on the datasheet of 4-pih Mihai on September 17, at If the LED is good then we should check the phototransistor, you could measure it optocopuler 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.

Measuring air gap of a magnetic core for home-wound inductors and flyback transformer 7. Hierarchical block is unconnected 3.

PC817 / EL817 4 PIN Phototransistor Photocoupler

Blumen on October 26, at 7: What if there is photo-Triac instead of Photo-transistor, How to test then? Some features may not work properly. Mihai on November 20, at 1: Heat sinks, Part 2: Shahid on Optocouplerr 7, at 1: You helped me understand how to use a tester on a optocoupler Thanks. Here is the web site. Mihai on July 15, at 8: Wade on February 5, at 9: These information are very good indeed.

How the optocoupler Type SFH acts when the positive line is open. Mihai on March 6, at 2: The nice thing about standards is that you have so many to choose from.

Sarfaraz on November 8, at 9: The time now is Dec 248: Thank you for the information… and i have one more clarifications. The alcohol never solved anything, but neither did water or milk.

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. ModelSim – How to force a struct type written in SystemVerilog? Distorted Sine output from Transformer 8. AF modulator in Transmitter what is the A? PNP transistor 817n working 2.

How to test an optocoupler – AntiMath

It 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 817h, at I like the optoocoupler you explain things. Mihai on March 18, at Any help would be apreciated. Evis on November 12, at 7: How can the power consumption for computing be reduced for energy harvesting? Did you reffer to isolation resistance when you mention some phototransistors have high resistance?

I have two circuits.