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Now put the selector switch to a low resistance mode, connect the MT1 and gate to positive lead and MT2 to negative lead. If the above tests are positive then we can assume that the triac is healthy.

How to test a triac. You may also like: But you cannot trigger the gate by connecting it to the same potential as MT1.

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 m10lzz47 problem if you reverse the connection.

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I agree with the previous comments. Testing triac using a multimeter. The multimeter will show a high resistance reading open circuit. When you release the push button, you can see the lamp extinguishing. MT2 should be at the top and MT1 at the bottom, next to the gate M10pz47.


Almost all type of triacs can be tested using this circuit. The multimeter will now show a low resistance reading indicating the switch ON. IIRC the description of the test circuit has an error: Please research this point and correct the fucking diagram, you retards, instead of wasting peoples time. M10lz74 are dataseet different. Trigger voltage in phase with MT2 at top to allow triac to operate in the first and third quadrants when AC is normally applied.

MT1 and MT2 are labelled back to front. I just tested it on an actual part. The triac test circuit shown is incorrect and will not work as shown. I have test this circuit with a TICM triac. Circuit for testing a triac. Leave a Reply Cancel reply Your email address will not be published. Wireless mains voltage tester. If the above tests datashdet positive you can assume that the triac is healthy. A multimeter can be used to test the health of a triac.

How to test datssheet LDR. Please correct the diagram. 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.

Eric, M0lz47 and MT2 have to be reversed, as you say. Your email address will not be published. Are these some other types of triacs, in behaviour or so, than the TIC ones?


Volt 20A TRIAC TO Isolated – NTE

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.

The drive must go from MT2 to G. Thanks for your help! MT2 label should be ,10lz47 the top and MT1 label at the bottom side with the gate.

Great step by step instruction. This is another approach for testing a triac. Thanks for pointing out. 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.

If wired that way it will work correctly. Now press the push button switch S1. Connect triac to the circuit as shown in circuit diagram and switch S2 ON.

The lamp must not datasheef. This circuit is nothing but a simple arrangement to demonstrate the elementary action of a triac.

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