using of scr in ltspice

[sundas]

hi, actually i am using ltspice software and i dont know how to use scr because there is no build in scr? please help.

 

[Harald Kapp]

Welcome to the forum.

LTSPICE has no model for an scr. You need to find a SPICE model for the SCR and incorporate it as a subcircuit to your LTSPICE schematic.
Here's a guide how to proceed (page 4).

Here you can find examples of SPICE models for scrs.