293КП3А - dual Soviet/Russian bidirectional optocouple (aka photorelay or solid-state relay) in DIP package
<a href="//commons.wikimedia.org/w/index.php?title=User:Retired_electrician&amp;action=edit&amp;redlink=1" class="new" title="User:Retired electrician (page does not exist)">Retired electrician</a>
2022-12-03 14:09:29
<span class="int-own-work" lang="en">Own work</span>