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Bypass Caps - is 1000V necessary?

I am considering changing out some capacitors in my preamp. There are four larger caps, two rated at 2.2uF - 400V and two at 6.8uF - 250V. These four are all bypassed by polystyrene caps at 0.033 uF - 1000V.

For the larger four caps, I am considering using the same values of Mundorf Supreme Silver/Gold, which are all rated at 1200VDC, so I should be ok there. However, for the bypass caps I would like to consider using Sonicap Platinum caps but those are only rated at 400VDC. My other consideration would be to use the new V-Cap CuTF (Copper Foil Teflon Film) series that are rated at 600V. Since the larger caps are rated at either 400 or 250 VDC, does it make sense that the bypass cap has to be rated at 1000V, or am I safe simply matching or exceeding the voltage rating of the larger cap that is being bypassed?

If I actually need 1000V or greater, I could use the Mundorf Supreme Silver/Oil that are rated at 1200VDC, as the bypass caps.


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Topic - Bypass Caps - is 1000V necessary? - mitch2 10:46:48 04/17/10 (9)
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