* Question
| Method for identifying three poles of thyristor |
* Answer
| The method of identifying the three poles of the thyristor is very simple. According to the principle of the P-N junction, it is only necessary to measure the resistance value between the three poles with a multimeter.There is a P-N junction between the gate and the cathode, so its forward resistance is in the range of a few ohms to several hundred ohms, and the reverse resistance is larger than the forward resistance.In addition, when measuring the positive and negative resistance of the control pole, the multimeter should be placed in the R*10 or R*1 gear to prevent the voltage from being too high and the reverse polarity of the control pole.If the positive and negative poles of the component are short-circuited, or the anode is short-circuited with the control pole, or the control pole is short-circuited with the cathode, or the control pole is disconnected from the cathode, the component is damaged. |
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