Vishay Intertechnology has extended its 193 PUR-SI series of miniature snap-in power aluminium electrolytic capacitors with new voltage ratings of 550 V and 600 V. 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. But with Vishay’s higher voltage ratings up to 600 V, the enhanced 193 PUR-SI series devices released 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.
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 aluminium 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 catalogue houses in small quantities. Production quantities are available now, with lead times of 18 weeks.
