Capacitors offer lower dissipation factor and reduced capacitance loss under DC bias, improving efficiency and reliability in high-voltage generators used for X-ray imaging, baggage scanning, air purification, and pulsed laser applications.
A new series of high-voltage ceramic disc capacitors from Vishay Intertechnology promises lower power losses in demanding applications such as medical imaging, baggage scanning, industrial X-ray systems, air purification, ionizers, and pulsed lasers.
The HVCC Class 1 radial-leaded capacitors stand out for delivering low dissipation factor (DF) and reduced capacitance loss under DC bias. At 15 kV, the devices show less than 25% capacitance loss—about half that of typical Class 2 capacitors—while maintaining a DF of below 1.0% at 1 kHz, roughly 0.5% lower than comparable parts. This performance combination helps boost efficiency and reliability in high-voltage generators where even small energy losses can accumulate into significant system inefficiencies.
The key features are:
- Capacitance range: 100 pF to 1 nF
- Standard tolerance: ±10%
- Voltage rating: up to 15 kVDC
- Operating temperature: –30 °C to +85 °C
- Structure: silver-plated ceramic disc
From a compliance and manufacturability standpoint, the series is RoHS-compliant and offered with straight leads, easing integration into high-voltage circuits. Samples and production quantities are already available, with typical lead times of 12 weeks.
The launch reflects growing demand for high-efficiency passive components in advanced medical and industrial systems, where stable capacitance and low DF directly translate to improved imaging resolution, reduced thermal losses, and longer system lifetimes.By halving the bias-related capacitance loss common in Class 2 ceramics, the HVCC Class 1 series provides designers a margin of reliability in safety-critical systems where component failure is not an option.
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