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identificare componenta electronica

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Vezi aici Testing diacs and sidacs https://www.repairfaq.org/sam/semitest.htm#sttds sau aici http://www.edaboard.com/thread227947.html

Sau poti sa incerci si asta:


The 100V SIDAC (for the series reactor ballasts for the 55V HPS lamps) you may quite easily check as well:
1) An Ohm-meter should read an open circuit
2) Connect a regular incandescent bulb (20..40W) in series with the SIDAC to the mains, the lamp should light at a reduced brightness, but without any 60Hz flicker. If you own a variac, you may try to connect the lamp to the output and observe the response. The lamp should remain completely OFF from zero till about 70..80V, then should rather abruptly light up to reduced brightness. A small region (5..10V) where the lamp is flickering at 60Hz (only one polarity conducting) is OK.

The 200V SIDAC's (for the lamps with arc voltage of 70V and above, so S56 and higher wattages) could be tested principally the same way, you only need all voltages double. A 120/240V tapped ballast primary used as a step up transformer and either 240V or two 120V bulbs in series would do the job rather safely (for a lab test purpose).

Trebuie sa ai grija ca la testari sa nu depasesti curentul maxim suportat de 1A.Bine e,cum se zice mai sus,sa ai un autotransformator.

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