Vishay Extends Aluminum Capacitors Rating Up to 600 V for DC Links
Key features and benefits
The extended VISHAY 193 PUR-SI series is part of the BCcomponents aluminium electrolytic capacitor family, optimized for compact, high-ripple DC-link use. The latest variants add 550 V and 600 V rated voltages on top of the existing lower voltage range.
Key technical features include:
- Rated voltages up to 600 V for use on high-voltage DC buses.
- Ripple current capability up to 3.27 A (RMS) at 100 Hz and +105 °C, typically 10% to 30% higher than standard snap-in capacitors in similar case sizes.
- Useful life of 5000 hours at +105 °C, supporting design targets of more than 25 years’ operation at ambient temperatures up to around +60 °C in many applications.
- Available in multiple miniature snap-in case sizes, with diameters from roughly 22 mm to 35 mm and lengths from around 25 mm to 60 mm according to the manufacturer datasheet.
- Optional 3-pin keyed polarity snap-in terminal configuration for more stable PCB mounting and reduced risk of incorrect insertion.
Practical benefits for design and purchasing:
- Fewer capacitors in series: higher voltage ratings reduce or eliminate the need to stack multiple 400 V to 450 V devices with balancing resistors to cover DC bus voltages up to roughly 1100 V.
- Lower BOM and assembly cost: removal of resistor networks and fewer can sizes simplify the bill of materials and manufacturing.
- Improved reliability: fewer components and the removal of balancing resistors reduce potential failure points and leakage paths, while added voltage headroom supports longer capacitor lifetimes in real use.
- Space savings: higher energy storage per can, combined with miniature case sizes, helps shrink DC link banks or free board area.
