Help with thyristor currents please

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SUMMARY

The discussion focuses on using the 2N5062 thyristor as a switch for controlling current output. It confirms that a minimum gate trigger current of 200 microamps must be applied to the gate for the thyristor to conduct. Additionally, the anode current must exceed the holding current of 5 milliamperes to maintain conduction after the gate pulse is removed. It is recommended to place the load resistor on the anode side for a simpler trigger arrangement.

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  • Understanding of thyristor operation and characteristics
  • Familiarity with gate trigger current and holding current concepts
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Physicist3
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Hi, I want to use a 2n5062 thyristor as a switch to output a current when the thyristor is on. I have found a data sheet which has values for gate trigger current and holding current (200 microamp and 5 milliamperes) respectively. Am I correct in thinking I must apply at least the gate trigger current value to the gate to get the thyristor to conduct and that for it to conduct, the anode current must be higher than the holding current for the thyristor to remain on when the gate pulse is removed? If the load is represented by a resistor, should this be on the anode side rather than the cathode side?
 
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Physicist3 said:
Hi, I want to use a 2n5062 thyristor as a switch to output a current when the thyristor is on. I have found a data sheet which has values for gate trigger current and holding current (200 microamp and 5 milliamperes) respectively. Am I correct in thinking I must apply at least the gate trigger current value to the gate to get the thyristor to conduct and that for it to conduct, the anode current must be higher than the holding current for the thyristor to remain on when the gate pulse is removed?
That sounds right.
If the load is represented by a resistor, should this be on the anode side rather than the cathode side?
You'll find the trigger arrangement is simpler if the load is in the anode. The cathode is then conveniently common to both the load and the gate triggering.
 

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