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Are these some other types of triacs, in behaviour or so, than the Mm10lz47 ones? Leave a Reply Cancel reply Your email address will not be published. Thanks for your help! Thanks for pointing out. You may also like: Circuit for testing a triac. MT2 label should be at the top and MT1 label at the bottom side with the gate.

Volt 20A TRIAC TO Isolated – NTE

Connect triac to the circuit as shown in datqsheet diagram and switch S2 ON. This circuit is nothing but a simple arrangement to demonstrate the elementary action of a triac.

Previous post Next post. MT2 should be at the top and MT1 at the bottom, next to the gate G. Now put the selector switch to a low resistance mode, connect the MT1 and gate to positive lead and ,10lz47 to negative lead. If the above tests are positive then we can assume that the triac is healthy.


mm10lz47 They are definately different. Testing triac using a multimeter. First put the multimeter selector switch in dafasheet high resistance mode say Kthen connect the positive lead of multimeter to the MT1 terminal of triac and negative lead to the MT2 terminal of triac there is no problem if you reverse the connection.

Your email address will not be published. Almost all type of triacs can be tested using this circuit. The lamp must not glow.

When you release the push dagasheet, you can see the lamp extinguishing. Wireless mains voltage tester. Great step by step instruction.

The multimeter will show a high resistance reading open circuit. Trigger voltage in phase with MT2 at top to allow triac to operate in the first and third quadrants when AC is normally applied.

datasheft How to test a triac. Anyway this test is not applicable triacs that require high gate voltage and current for triggering. If the input is AC or pulsed DC, the lamp stays on while S1 is held closed, and then turns off at the next zero-crossing — i. MT1 and MT2 are labelled back to front. If wired that way it will work correctly.

Please correct the diagram.

Datasheet archive on 11-12-2006

Yes now it is ok and working Mt2 and Mt1 must dztasheet reversed otherwise it is not working I was tried many times I would like to thanks all of you for the tips. I just tested it on an actual part. I agree with the previous comments. The drive must go from MT2 to G. The triac test circuit shown is incorrect and will not work as shown.


The lamp must glow indicating the switching ON of triac. Eric, MT1 and MT2 have to be reversed, as you say. A multimeter can be used to test the health of a triac.

The multimeter will now show a low resistance reading indicating the switch ON. If the above tests datasheet positive you can assume that the triac is healthy.

I have test this circuit with a TICM triac. Please research this point and correct the fucking diagram, you retards, instead of wasting peoples time. Now press the push button switch S1.

But you cannot trigger the gate by connecting it to the same potential as MT1. IIRC the description of the test circuit has an error: How to test an LDR. This is another approach for testing a triac.