Vishay Intertechnology Extends 193 PUR-SI Series of Snap-in Power Aluminum Capacitors With Voltage Ratings of 550 V and 600 V
Vishay Intertechnology, Inc. announced that the company has extended its 193 PUR-SI series of miniature snap-in power aluminum electrolytic capacitors with new voltage ratings of 550 V and 600 V. The Vishay BCcomponents devices deliver up to 30 % higher ripple current than standard solutions in similar case sizes and offer a longer useful life.
Traditionally, designers have used three 400 V to 450 V capacitors in series, with voltage balancing resistors across each device, to handle DC bus voltages up to 1100 V — an approach that adds design complexity and potential failure points. With their higher voltage ratings up to 600 V, the enhanced 193 PUR-SI series devices released today allow designers to achieve this voltage range with fewer components, while eliminating the need for voltage balancing circuits — saving PCB space and reducing BOM costs. In addition, the added voltage headroom extends capacitor lifetimes and enhances overall system reliability.
193 PUR-SI – Features
Designed to withstand the demanding switching currents of today’s high power converters, the 193 PUR-SI series devices handle ripple currents up to 3.27 A. Their long useful life of 5000 hours at +105 °C permits use in demanding applications requiring more than 25 years of operation from capacitors in ambient temperatures up to +60 °C. Featuring a cylindrical aluminum case insulated with a blue sleeve, the devices offer capacitance from 47 µF to 820 µF in 25 compact case sizes ranging from 22 mm x 25 mm to 35 mm x 60 mm. The RoHS-compliant capacitors are also available with 3-pin keyed polarity snap-in terminals for more stable PCB mounting.
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; chargers, battery management systems (BMS), and motor controls in electric (EV) and hybrid electric (HEV) vehicles; industrial motor drives and air conditioners; solar inverters; medical equipment; UPS; and welding equipment.
Device Specification Table:
| Case size (D x L in mm) | 22 x 25 to 35 x 60 | |
| Capacitance range | 47 µF to 820 µF | |
| Tolerance | ± 20 % | |
| Rated voltage | 400 V to 450 V | 500 V to 600 V |
| Category temperature range | -40 °C to +105 °C | |
| Useful life at +105 °C | 5000 h | |
| Max. ESR at 100 Hz | 120 mΩ to 3365 mΩ | |
| Max. impedance at 10 kHz | 80 mΩ to 2700 mΩ | |
| Sectional specification | IEC 60384-4 / EN130300 | |
| Climatic category IEC 60038 | 40 / 105 / 56 | 25 / 105 / 56 |
Samples of the extended 193 PUR-SI series capacitors are available from catalog houses in small quantities. Production quantities are available now, with lead times of 18 weeks.