[Explanation of the Causes of Capacitor Failure] Capacitor capacity reduction in the charge and discharge circuit.

As a countermeasure, please use capacitors that are compatible with the charging and discharging circuit!

We will introduce a case where the capacity of aluminum electrolytic capacitors decreased in a circuit where the charging and discharging of capacitors, such as welding machines and strobe flashes, is frequently repeated. When charging and discharging aluminum electrolytic capacitors repeatedly, the following reactions continuously occur on the surface of the cathode foil. [During Charging] Gas generation due to the electrolysis of the electrolyte [During Discharging] The charge on the anode foil moves to the cathode foil, oxidizing the cathode surface As a result, internal pressure rises, leading to open failures when the pressure relief valve operates, or failures due to the decrease in capacity of the cathode foil, which reduces the capacitance of the capacitor. This phenomenon can occur not only during charging and discharging but also when a large voltage fluctuation is applied to the capacitor. [Countermeasures] ■ Use capacitors with specifications suitable for the charging and discharging circuit in circuits where frequent charging and discharging occurs. *For more details, please refer to the PDF document or feel free to contact us.

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