John Robertson wrote:
I am replacing an old TRIAC that is used for a solenoid driver driven
by a photo-flash (I have dozens of these in my classic rifle gallery)
and I can't find anything on line about this particular device.

I know it is 400V, 3A, and is in a TO-11 like metal can however what I
can't find is the Gate current. This is a sensitive gate TRIAC and I
suspect it is either a 3MA or a 10MA device, but would like a copy of
the original TECCOR specs to be sure that the replacement I am using
is close enough to the original for long term reliability. This is
being controlled by a device called a Vactrol - VTL2C3, and I have
several dozen of these controllers that eventually need upgrading.

So, if anyone has a TECCOR Electronics Inc. manual lying around from
the early 70s and can scan me the page(s) on the Q4003M3 that would be
great. I have found sheets online for other flavours of the Q4003
series, but just not the Mx version.

Thanks!

John :-#)#


The Teccor triac part numbering scheme says that the "M" is for a
non-isolated TO-218 package. You could just substitute another package type
such as the "F" or "R" package and get the same triac in a slightly
different package.
Looks like the "M" package was discontinued for triacs years ago,

Dave M