warezwally Posted January 13, 2007 Report Share Posted January 13, 2007 Hello, im building a power supply and i have a 3 legged 5600uf electrolytic cap. Never seen a cap with 3 legs. Can someone tell me what they are, they are all different lengths Here are some picsCap 1Cap 2Cheers Quote Link to comment Share on other sites More sharing options...
mvs sarma Posted January 13, 2007 Report Share Posted January 13, 2007 Hi, the third pin is generally connected to body and body itself is therwise isolated from the capacitor-- toy may check up as you have the piece acrss Quote Link to comment Share on other sites More sharing options...
AN920 Posted January 13, 2007 Report Share Posted January 13, 2007 You used to get split capacitors (2 caps with one common neg terminal) used in older TV applications, although I have not seen them for quite some time. Quote Link to comment Share on other sites More sharing options...
warezwally Posted January 14, 2007 Author Report Share Posted January 14, 2007 Ive been told its to stop ESR and it should be soldered like the + lead Quote Link to comment Share on other sites More sharing options...
AN920 Posted January 14, 2007 Report Share Posted January 14, 2007 Extra leg may also be for mechanical strength when mounted in a pcb and not connected to anything internally. Few simple measurements will be all that is needed to solve the mystery. Quote Link to comment Share on other sites More sharing options...
Fowkc Posted January 14, 2007 Report Share Posted January 14, 2007 Type "three terminal capacitor" into Google and a lot of pages come up.Looks like they're designed to conteract the inductance of the leads to lower the ESR. Or something like that, I'm no engineer. ::) Quote Link to comment Share on other sites More sharing options...
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