Snap-in Electrolytics Enable Higher Power Density to Save Space, Lower CostsApril 15, 2020 by Paul Shepard
Vishay Intertechnology, Inc. has 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 5.05A, 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 500V in 25 compact case sizes ranging from 22mm by 25mm to 35mm by 60mm. 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 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.
Samples and production quantities of the 257 PRM-SI series capacitors are available now, with lead times of 14 weeks. Pricing depends on capacitance and voltage rating. For example, the price for 1200µF / 250V devices in the 30mm by 45mm case size is $3.34 per piece in 2,000-piece quantities.