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TCET1108 OPTOCOUPLER PHOTOTRANS 260% 4DIP TCET1108 1108 T1108 ET1108
I was referring to the junction resistance. 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.
Copyright laws are applicable for the content of this system. How the optocoupler Type SFH acts when the positive line is open.
I only have a digital multi meter. Pls let me know. Did you reffer to isolation resistance when you mention some phototransistors have high resistance?
Good design is as little design as possible. The purpose of an optocoupler is to transfer signals from one circuit to another yet keep them galvanically isolated. Mihai on March 18, at Thank you for the information… and i have one more clarifications.
There is no law governing all things. Better check the datasheet for a test circuit. Mihai on July 19, at 3: Some features may not work properly. Hi, maybe a stupid question: Emprical method you mention above or the testing circuit on the datasheet of H11B1? 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. Sunil on March 3, at 3: Hi, Both methods are correct.
Use the following short links to get directly to the properties of interest in this datasheet: The LED is basically a diode, and it should not conduct both ways not get values on the meter both ways. Mihai on June 10, at Your email address will not be published.
In the datasheet example, a eatasheet DC is connected at the output, so that one can check the variation in voltage with a voltmeter or an oscilloscope. Michael on January 21, at 3: The alcohol never solved anything, but neither did water or milk.
If the input is at 2V Datashheet, then the output resistance should be around — ohms. Here I want to show you how to check if an optocoupler is working. Material Data Center offers a comprehensive plastics database, calculation tools, CAE interfaces, a literature database and an application database.
ET pdf Datasheet P1 Part Num IC-ON-LINE
Any decision about the application of materials must be double checked with the producer of this material. For access to this extra information a registration is datasehet.
Free online registration is available. Wade on February 5, at 9: Material datasheets available free.
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.
Leave a Reply Cancel reply Your email address will not be published. Muhammad Akhlaq on May 30, at 9: Evis on November 12, at datashret For response time or frequency response data, check the datasheet. I hope it helps. I guess, it should work mostly the same as a normal triac. The nice thing about standards is that you have so many to choose from. Viliam on September 7, at 1: