Sozo Voltage Rating

[boots]

I think there was a thread about this recently, but I didn't pay attention.

I am thinking about getting some Sozo .022 caps to use as blocking caps in a Tweed-type build. Probably something like a Champ 5F1 circuit.

I noticed the voltage rating on the Sozo caps is only 400 volts, which seems a little bit on the lean side. I would feel more comfortable with a 600 volt cap.

Has anybody had any failures using the 400 volt Sozo's as blocking caps?

The Sozo's seem to be highly regarded, and I imagine they are widely used amongst this group. I was surprised to learn they were only rated at 400 volts.

[ToneMerc]

All those great vintage amps with coveted Phillips "mustard" caps, nearly all of those caps were the 400V rated ones.

In most decoupling stages, you won't get that close. No worries, use em.

TM

[Structo]

Sometimes when an amp is first powered on, depending on the rectifier and other factors, the voltage can initially go high as the filter caps charge, that is the reason you generally want to use at least 400v caps in a tube amp.
Then the voltage settles into the operation range.

[tictac]

Coupling caps are floating above ground anyway, unlikely they'll ever see anything near 400v across them.

The 400v rating means 400v from one side of the cap to the other, i.e. if one side of the cap was connected to ground the other lead could be connected to a voltage up to 400v...

TT