I need automatic switch,but once it is turn ON and it should not be turn OFF

I need automatic switch,but once it is turned ON and it should not be turned OFF, it should be used in control circuit.. NO power electronics switches are preferred.

Answer 1

[ALBERT ALEXANDER STONIER]

You can try with the file given in the link: https://www.mathworks.com/matlabcentral/fileexchange/59461-function-based-on-off-control/content/SAA.slx