Replace 2sD 1804 with c5705 and Collector power Dissipation,PD???

Aug 20, 2007 1 Replies
S

I could not find a local shop that sells 2sd 1804 transistor, i can only find 2sc5707 transistor.



D1804

formatting link
C5707 www.ortodoxism.ro/datasheets/sanyo/2SC5707.pdf



The D1804 has a 20W Collector Dissipation,PD. The C5707 has a 15w Collector Dissipation,PD.



what's the rule for replacing transistor in inverter? Does the Collector Dissipation have to larger than the original one? What 's the Collector Dissipation,PD? Is it meant the max power that the transistor can draw without damaging itself?



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L

snipped-for-privacy@yahoo.com wrote in news: snipped-for-privacy@a39g2000hsc.googlegroups.com:

Yes. While you might get by with the lower one by clamping it on a bigger heatsink, in inverters they alreay use beefy heatsinks, so go higher if you can. Doing that might cost the makers money enough to make them not want to do that but for one-off repair it's a good idea. Make sure you know why the first ones burnt out though, or next time something else might give way if the transistors are stronger.

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