3 March 2018

Compare Holding current and Latching current

Holding current

  • It is defined as the minimum anode current beyond SCR turns off. 
  • The holding current is associated with turned off process. 
  • The holding current is always less than the latching current. 
  • It is given mili – ampere. The SCR is turned off if the anode current reduces below 5 milli ampere for the specific rating of holding current milli ampere in the data sheet.

Latching current

  • It is defined as the minimum anode current requires keeping turned on SCR after removing gate signal. 
  • The latching current is associated with turned on process. 
  • The value of latching current is approximately 2 to 3 times to that of holding current. 
  • The value of holding current and latching current is constant and it does not depend on gate current magnitude.

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