MALVERN, Pa. Vishay Intertechnology, Inc. 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 20ย % smaller, while providing longer useful life to 5,000 hours at 85 ยฐC.
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 ยตF to 3300 ยตF | |
| Tolerance | ยฑ 20 % | |
| Rated voltage | 200 V to 450 V | 500 V |
| Category temperature range | -40 ยฐC to +85 ยฐC | -25 ยฐC to +85 ยฐC |
| Useful life at +85 ยฐC | 5,000 h | |
| Max. ESR at 100 Hz | 70 mฮฉ to 3740 mฮฉ | |
| Max. impedance at 10 kHz | 60 mฮฉ to 3240 mฮฉ | |
| 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.
