MALVERN, PA — 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|
|Tolerance||± 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|
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