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For SCR (a) I2t rating of the SCR represents the capability to withstand the overload current for the specified time, where the current (I) is the rms value for the time interval t.


73. For SCR
  • (a) I2t rating of the SCR represents the capability to withstand the overload current for the specified time, where the current (I) is the rms value for the time interval t.
  • (b) The negative gate bias decreases the forward blocking capability and maximizes the false triggering possibility during high dv/dt operation.
  • (c) Resistance at the gate increases the dv/dt capability and lowers the turn-off time.
  • (d) The gate non trigger voltage is the maximum DC gate voltage that maybe applied between gate and anode for which the device can maintain its rated blocking voltage.
  • (e) The turn-off time becomes shorter due to introduction of Au Atoms in silicon, which serve as 'traps' for carriers, but it increases ON state loss.
  • A. (a) and (b) only
  • B. (b) and (c) only
  • C. (a) and (d) only
  • D. (c) and (e) only
Answer Option: D
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