Discriminant one-way thyristor
module three gate method is very simple, according to the P -
N junction principle, as long as the multimeter measure between three gate resistance.
One-way thyristor module between the anode and cathode of the forward and reverse resistance in hundreds of thousands of the above, the anode and control between forward and reverse resistance in hundreds of thousands of the above (
There are two P - between them
N junction, and in the opposite direction, so that the anode and the control to speak very positive and negative)
One-way thyristor module control between the pole and the cathode is a P -
N junction, so it is about in a few European - resistance
The scope of the hundreds of the reverse resistance is bigger than forward resistance.
But control diode characteristic is not very ideal, the reverse is not completely in the blocking state, there can be a larger electric current passes through, so, sometimes measured control reverse resistance is small, do not tell the control features extremely bad.
In addition, when measuring control is very positive and negative to the resistance, multimeter should be on R10 or R1 block, to prevent the reverse breakdown voltage control is extremely high.
One-way thyristor module if measured element to have short circuit, Yin and Yang are very positive and negative or anode and control extremely short circuit, or reverse short circuit control pole and the cathode, or control pole and the cathode circuit, components damaged.
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