Snap-in capacitors handle higher voltages
Vishay has added 550‑V and 600‑V options to its 193 PUR‑SI line of miniature snap‑in aluminum electrolytic capacitors. According to the manufacturer, the capacitors deliver up to 30% higher ripple current than standard components of similar case sizes, along with a longer useful life.
Designers often connect 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. While effective, this approach increases design complexity and introduces potential failure points.
With voltage ratings up to 600 V, the 193 PUR‑SI family allows designers to handle DC bus voltages up to 1100 V using fewer capacitors. This eliminates the need for voltage‑balancing resistors, saving PCB space and reducing BOM costs. The additional voltage headroom also extends capacitor lifetimes and improves overall system reliability.
In addition to higher voltage ratings, the 193 PUR‑SI series provides robust performance and flexible configurations. The capacitors handle ripple currents up to 3.27 A and offer capacitance from 47 µF to 820 µF in 25 case sizes. A rated life of 5000 hours at +105°C enables up to 25 years of operation at +60°C.
Samples of the extended 193 PUR‑SI series capacitors can be ordered from catalog distributors in small quantities. Production quantities are currently available, with lead times of 18 weeks.
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