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Old 13th October 2011, 09:24 PM   #1
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Default Mundorf SI+

Bit of a silly question... I bought these caps, but they don have markings on it (not at the pins, nor is there a line for minus).... No datasheet can be found...

What are the pins?

Thanks

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Old 13th October 2011, 11:28 PM   #2
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For what it is worth, I found this statement on hificollective: ''Mundorf is converting over "all" SI caps to the new PI configuration...the PI types have the same terminal spacing as the SI, but the lead material itself is vastly superior (tinned OFHC copper...non-magnetic; instead of clad steel for the SI)''

But damned, it's hard to find datasheets on either one ! I couldn't find something within 20 minutes !
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Old 14th October 2011, 12:47 AM   #3
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Search for Mundorf. It will be a German website. Open it and click on US flag. Then choose downloads. Then choose 2011 catalogue. It lists all of their products. The four conductor caps should had two small and two large leads. The diagrams will tell you which is which. Regards John Dozier
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Old 14th October 2011, 09:34 AM   #4
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You're right, but both the SI+ and PI products are not in there. The SI+ series is a discontinued product, and I only found some information about the 2-pin caps, not about the 4-pin cap Studiostevus has.
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Old 14th October 2011, 01:37 PM   #5
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In the 2011 catalogue there are other four pin caps. Diagram should be applicable. Be careful, there are TWO catalogues on two differenct websites. One is the 2008 catalogue. Of course that may be the one you need. Spend more time searching. Regards
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Old 14th October 2011, 04:05 PM   #6
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If all else fails, shoot them an email, they will respond in a few days and are very helpful with inquiries.
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Old 14th October 2011, 04:22 PM   #7
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The four pins are not all the same. The pin that is closest the center of the capacitor is negative output. The postitive output is opposite. Looking at the bottom of the capacitor, the negative input is to the left, where the positive input to the right. I hope this helps.

Dennis
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Old 14th October 2011, 04:45 PM   #8
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The picture is not very clear. Usually the - is knurled. The + smooth.

Quote:
The pin that is closest the center of the capacitor is negative output. The postitive output is opposite.
That negative pin also is also the "other" way round.

Not too shure all three are + come to think of it. (So my pic might be wrong)(but you could easily check for that with a multimeter)
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Last edited by Bas Horneman; 14th October 2011 at 04:53 PM.
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Old 14th October 2011, 05:07 PM   #9
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There's nothing knurled here (whatever that means)

I retook the picture. One of the pins indeed points inwardsClick the image to open in full size.
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Old 14th October 2011, 06:27 PM   #10
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Quote:
There's nothing knurled here (whatever that means)
They are ALL knurled (See pic of what a knurled surface looks like)
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