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From: "Phil Allison"
References: <3DB89391.E73EF17E@earthlink.net> <3DBA2E08.19B9E242@earthlink.net> <firstname.lastname@example.org> <3DBCB546.6FAE493E@earthlink.net>
Subject: Re: TRIAC "wears out" on dimmer circuit
X-Newsreader: Microsoft Outlook Express 5.50.4522.1200
Date: Mon, 28 Oct 2002 15:45:57 +1100
NNTP-Posting-Date: Mon, 28 Oct 2002 15:37:05 EST
Organization: Telstra BigPond Internet Services (http://www.bigpond.com)
"Robert Baer" wrote in message
> > ** So you are a double mind reader. First you read the OP's
> > now you inform us that an unpublished I*I*t spec is unbelievably poor.
> > The ITSM figure for the TIC 236 D is given as 100 amps and
> > is typical for a 12 amp triac which have I*I*t figures of about 40.
> > you any reason, that does not involve ESP, to say that a 240 watt lamp
> > will do it in.
> > ..................... Phil
> By your own statement, the lamp takes 16 amp peak and the rating is 12
> amps peak.
> So by that alone, the rating is exceeded.
** Are you a total nut or what ? - the published rating is *100 amps*
for one cycle with full rated curent before and after. That is what ITSM
> I have worked with Ignitrons, SCRs, Triacs and other solid state
> devices in the daze (long ago) when I*I*T ratings were published or
> otherwise reasonably available.
** Shame you learnt so little.
> No current published data sheets by manufacturers give I*I*T ratings;
> that info seems to have gone by way of the metaphorical dinosaur,
> roughly 30 years ago.
** I*I*t ratings are given for fusing considerations.
> The so-called info via ISTM looks as flaky as using a 2N2222 chip
> mounted in a TO-3 package for 1 amp switching (do not laugh; this has
> been done; prolly by execs that moved on to Enron).
** You on drugs ??? Let me see your eyes??
> And i can categorically state that one can be within current, power
> and voltage ratings (even within SOAR ratings) and *still* be way
> outside I*I*T ratings of these devices.
** You could not state the time - what the hell do you think a 100
amp one cycle rating suggests ??
> I do not have to be a mind reader to know that the resistance of any
> incandescent lamp (or tube filament for that matter) is far lower than
> the steady state resistance.
** So ??? We all know that one.
> All one needs a little simple knowledge and the rest is a logical
** Robert - go drop. You have no knowledge and no logic.
. . . . ........... Phil
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