[LeifCarrotson]

> 25V electrolytic capacitors in the input circuitry

Note that the 25V maximum rating on the side of the cap is not a design goal: Good designs will de-rate capacitors for longer life. A typical guideline is to apply no more than 70% of an aluminum electrolytic capacitor's maximum rated voltage, 60% of a ceramic chip capacitor's max rating, or less at elevated temperatures and ripple current levels. See [1] for more guidance, or look up the manufacturer datasheet.

It's just not that expensive to install 35V, 50V, or 63V rated capacitors, and it does so much to extend the lifetime and reliability of the products. I always hate taking apart a $2000 servo drive, PLC, or TV, and seeing a blown $0.40 capacitor where a $0.45 capacitor would have been fine, hopefully it didn't take out any more expensive components when it died.

Of course, my experience is primarily in one-off lab PCBs and <100 unit industrial hardware, so perhaps consumer price sensitivity for mass-market electronics makes this guidance different...

[1] https://www.navsea.navy.mil/Portals/103/Documents/NSWC_Crane...