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    Stocking new power aluminum capacitors for power density

    Vishay Intertechnology, Inc. (NYSE: VSH) introduced a new series of miniature snap-in power aluminum electrolytic capacitors that enables higher power density designs. The Vishay BCcomponents 257 PRM-SI series offers up to 20 % higher ripple current than previous-generation solutions in case sizes that are up to 20 % smaller while providing longer useful life to 5,000 hours at 85 °C.

    With ripple currents up to 5.05 A, the devices released today allow designers to utilize fewer components to save board space and lower costs. Featuring a cylindrical aluminum case, insulated with a blue sleeve, 257 PRM-SI series capacitors feature rated voltages to 500 V in 25 compact case sizes ranging from 22 mm by 25 mm to 35 mm by 60 mm. The RoHS-compliant devices are also available with 3-pin keyed polarity snap-in terminals.

    As polarized aluminum electrolytic capacitors with a non-solid electrolyte, the devices are ideally suited for smoothing, buffering, and DC-Link filtering in switch mode power supplies used in medical, consumer welding, and test and measurement equipment, in addition to general industrial control and audio / video system applications.

    Device Specification Table:


    Case size (D x L in mm)

    22 x 25 to 35 x 60

    Capacitance range

    56 µF to 3300 µF


    ± 20 %

    Rated voltage

    200 V to 450 V

    500 V

    Category temperature range

    -40 °C to +85 °C

    -25 °C to +85 °C

    Useful life at +85 °C

    5,000 h

    Max. ESR at 100 Hz

    70 mΩ to 3740 mΩ

    Max. impedance at 10 kHz

    60 mΩ to 3240 mΩ

    Sectional specification

    IEC 60384-4 / EN130300

    Climatic category IEC 60038

    40 / 85 / 56

    25 / 85 / 56

    Samples and production quantities of the 257 PRM-SI series capacitors are available now, with lead times of 14 weeks.

    For more information, visit

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