Do Shelly 2.5 capacitors fail with 120 volts (US split phase) or only with 230/240 volts?

Fred17

Wondering whether I have to replace capacitors in advance for Shelly 2.5 relays that won't be exposed to more than 120 volts AC. Thanks for any experience or data you may have.

thgoebel

Drying-out of capacitors is mainly induced by temperature. Temperature inside a Shelly 2.5 is independent from voltage, cause the half voltage is accompanied by the double current, if power consumption of Shelly and/or attached appliances is the same. Thus, it is very likely that capacitors do have the same life cycle in a 120V grid.

Fred17

Thank you very much!