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Do you have any experience of placing two conventional X2 caps in parallel like the unconventional Auricap Twe

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Awe-d-o-file

In Reply to: RE: WIMA MP3-X2 Safety Cap EMI filter posted by Duster on November 05, 2014 at 17:18:13

I never did that tweak. It's two .47's from hot to neutral as I remember. They were rated at 630V but were not safety caps. They are also polarity marked but only for "best" performance and will work connected either way. I use Auricaps as an upgrade on the Detail Magnifier now. Safety caps supposedly have a construction that can handle line exposure and voltage spikes better. Either an X or Y type would do when going from hot to neutral.
Al's parallel filter was more complex and has four R/C/R strings with different a cap and resistor values in each string. He also then made a version with a resistor/inductor string from neutral to safety ground.
Parallel filters don't suffer from the drawbacks of a series filter but have their weakness too like most things there are pluses and minuses. There's a schematic on my site and prebuilt boards in the trader here with the inductor string. Sorry if that's an ad just trying to give you the most info.
ET

Edits: 11/06/14

Follow Ups:

Two conventional X2 caps in parallel - Duster 11:22:27 11/06/14 (1)
I understand the method, as I've implemented the Auricap Tweak (two non safety rated 0.47uF 630V Auricaps placed in parallel across L and N) for digital applications for a number of years without issue. My curiosity is about placing two safety rated X2 caps in parallel (such as two 0.1uF 250V WIMA MP3-X2) rather than only one cap as usual. Even though Audience implements Auricaps for their Adept Response PLCs, I feel far less confident using non safety rated Auricaps within a high current PLC than I do within a very low-current draw digital transport, and a very low-current draw digital interface processor.
- RE: Two conventional X2 caps in parallel - Awe-d-o-file 11:24:12 11/06/14 (0)
  I don't see any issue with doing it.
  
  ET

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