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The Testing and Qualification of 105°C 2000 hours Sanp-in Aluminum Electrolytic Capacitor with Ultra-compact Size

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DOI: 10.25236/bemes.2018.029


Xiaobo Qiu

Corresponding Author

Xiaobo Qiu


The paper first presents the volumes of different lifespan series of 85°C and 105°C type 400V470μF and 450V470μF snap-in aluminum electrolytic capacitors owned by the Company while introducing the super-compact capacitors developed by the competitor for volume comparison. Then the author illustrates the calculation method of element filling rate and points out that element filling rate is the main indicator of whether the element can be filled into the aluminum shell. The methods of reducing element volume are discussed including the increase of anode foil capacitance and the thickness reduction of anode foil, cathode foil and electrolytic paper. At the end, it is indicated that it is not enough to reduce the element volume from the mechanical angle in order to hit the target of miniaturizing aluminum electrolytic capacitors. Further electrical property tests and a string of lifespan and environment certification tests are needed.


Aluminum Electrolytic Capacitor, Load Life, Endurance Test, Capacitance, Component Test