> Can anyone help with a datasheet for the(2V) 5P4 SCR > manufactured by NEC > Any help greatfully appreciated! 2V5P4 ? From here, not much information http://www.iin.ne.jp/~kousyou/hukkatu-bn33.htm but, it looks like it is probably a low voltage and current part. If so then almost any SCR would work that has enough voltage and current rating for the application. The only tricky part is liable to be gate characteristic. Some are more sensitive than others. You can probably get some idea of gate drive from the circuit it is in. What is the application? Russell McMahon -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body