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