Electronic – Are there any non-ideal side-effects of putting capacitors in parallel to increase capacitance


I want a 500uF capacitor. Theoretically, I should be able to place 5 100uF capacitors in parallel to achieve 500uF of capacitance.

However, are there any side effects of practically implementing this? Are there non-ideal effects that I should account for?

Note: I'm looking for a 500uF surface mount ceramic capacitor. I've been able to find these, however, the tolerances are only +/- 20%. Furthermore, I've only found one manufacturer of these and I would prefer not be too dependent on a single manufacturer.

Best Answer

Paralleling capacitors is fine electrically. That actually reduces the overall ESR and increases the ripple current capability, usually more so than a single capacitor of the desired value gets you. There is really no electrical downside to this.

The prominent non-ideal effects are cost and space.