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This is another approach for testing a triac. If the above tests are positive you can assume that the triac is healthy. The drive must go from MT2 to G. If the input is AC or pulsed DC, the lamp stays on while Dagasheet is held closed, and then turns off at the next zero-crossing — i. Thanks for your help! The triac test circuit shown is incorrect and will not work as shown.

Almost all type of triacs can be tested using this circuit. Eric, MT1 and MT2 have to be reversed, as you say. Connect triac to the circuit as shown in circuit diagram and switch S2 ON. IIRC datasgeet description of the test circuit has an error: I have test this circuit with m10lz74 TICM triac.


But you cannot trigger the gate by connecting it to the same potential as MT1. Previous post Next post. How to test a triac. The lamp must glow indicating the switching ON of triac.

Anyway this test is not applicable triacs that require high gate voltage and current for triggering. This circuit is nothing but a simple arrangement to demonstrate the elementary action of darasheet triac. Yes now it is ok and working Mt2 and Mt1 must be reversed otherwise it is not working I was tried many times I would like to thanks all of you for the tips. Testing triac using a multimeter.

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A multimeter can be used to test the health of a triac. Are these some other types of triacs, in behaviour or so, than the M10l47 ones? First put the multimeter selector switch in a 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.

MT2 should be at the top and MT1 at the bottom, next to the gate G. Leave a Reply Cancel reply Your email address will not be published. Great step by step instruction. When datasjeet release the push button, you can see the lamp extinguishing. If the above tests dwtasheet positive then we can assume that the triac is healthy.


Circuit for testing a triac. Thanks for pointing out. They are definately different. Now put the selector switch to a low resistance mode, connect the MT1 and gate to positive lead and MT2 to negative lead.

I agree with the previous comments. How to test an LDR. If wired that way it will work correctly. Please research this point and correct the fucking catasheet, you retards, instead of wasting peoples time.

Your email address will not be published. The lamp must not glow. MT1 and MT2 are labelled back to front. You may also like: I just tested it on an actual part.

MT2 label should be at the top and MT1 label at the bottom side with the gate. Wireless mains voltage tester.