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Old 03-13-2012, 12:51 PM
gyula gyula is offline
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Join Date: Apr 2007
Posts: 739
Quote:
Originally Posted by jimboot View Post
Hi all I can light my bog standard 25watt bayonet cap 240 v lamp but I keep blowing tip41c even with heat sinks. @laurent I notice you do nt use any cooling on yours. Do they get hot? I'm using a 1k pot.
Hi Jim,

Probably the 100-110V max collector-emitter breakdown voltage limit for the TIP31C is to 'blame' for the blowing. Here is a more robust type, MJE13007
http://www.datasheetcatalog.org/data...onics/4164.pdf

try to use such higher than 100V power switching types.

Gyula
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