| abstract |
This electrolytic capacitor module is provided with at least two electrolytic capacitors (4-1, 4-2) having etch pits formed on an electrode foil. At least two types of electrolytic capacitors (4-1, 4-2) with different etch pit lengths are connected in parallel, and the number installed thereof may be the same or different. The electrolytic capacitors (4-1, 4-2) are either electrolytic capacitors with etch pit lengths less than or equal to 27 μm, or electrolytic capacitors with etch pit lengths greater than 27 μm. By this means, performance in the high-frequency region of the electrolytic capacitor is improved, the capacity reduction rate in the high-frequency region is suppressed, and the ripple current resistance in the high-frequency region is increased. |