What is the combined voltage rating of two capacitors connected in series?

When capacitors are connected in series, their combined voltage rating is indeed the sum of their individual voltage ratings. This is because each capacitor can handle its own voltage independently before reaching its breakdown point. As the total voltage across a series connection is shared among all capacitors, the combined voltage capacity is the total of what each can withstand.

For example, if you have two capacitors rated at 10 volts each connected in series, the total voltage that the series configuration can handle is 20 volts. It's important to remember that the actual capacitance of capacitors in series behaves differently, leading to a lower total capacitance than any of the individual capacitance values, but in terms of voltage ratings, they simply add up.

This method applies universally regardless of the specific voltage ratings of the capacitors involved, which underlines the essential characteristics of series connections in electrical circuits.