Aaaaah, OK, so there is a "step-up" in voltage at times, via what you're referring to as an "inverter," hence the max voltage rating that the manufacturer chose matters in such an instance, and you say that is a valid concern when it comes to an Express, but not the Duo. That makes sense. I was thinking, why did NEC put 50V caps over here, then 16V caps over there, when the motherboard operates at 7-10V, why not just get all 16V caps, you know? I figured there's possible spiking or step-up in voltage at times or something.
I answered my other concern about a 3.3uF capacitor for the Duo that's at 50V, that is, real small capacitance values come in high voltages (like ceramics) most of the time, so you don't find 3.3uF at 16V or something, they make 'em mostly at 50V and they're still pretty small for electrolytic aluminum type. Something Red Ghost had said made me think there was a spike in voltage for that 3.3uF, but that's not the case for the Duo as you say; it's just that small micro-farad value caps generally come in 50V ranges like under 47uF. The closer the capacitance value is to the traditional ceramic range for an electrolytic, the more likely it can handle 50V, etc. Seems like.
Well, I think I understand the rest of my concerns now although I'd like to hear more about this "ripple" concept you mentioned and how that should guide the substitution. Danke!
