Radial-leaded ceramic disc capacitors save space in HV scanning

Radial-leaded high voltage single layer ceramic disc capacitors in compact sizes have been announced by Vishay Roederstein. The HVCC series capacitors are claimed to be the industry’s only such components to deliver high capacitance values of 2nF. They offer guaranteed load life performance of 1000h at 125 per cent rated voltage and +105 degrees C. The dissipation factor is less than  1.5 per cent.

The HVCC series capacitors may offer a qualified and high performance drop-in replacement for almost all Murata part numbers starting with DHR, for which the company has sent out an official discontinuation notice. Customers are advised to refer to Vishay’s HVCC series datasheets to verify requirements.

The high capacitance HVCC devices eliminate the need to utilise two 1nF capacitors in parallel to reach values of 2nF. This saves space, reduces assembly costs, and increases reliability in high voltage generators for dental and baggage scanners, medical and industrial X-ray applications, and pulsed lasers.

The capacitors offer a capacitance range from 100 to 2000pF and standard tolerances of ± 20 per cent. Voltages range from 10 to 15kVDC and operate over a temperature range of -30 to +105 degrees C.

The HVCC series capacitors are also available with 20kVDC rated voltage, ± 10 per cent  tolerance, and with custom lead styles available on request.

The devices consist of a silver-plated ceramic disc with tinned copper-clad steel connection leads offering 0.6 and 0.8mm in diameter. The capacitors are available with straight leads with spacing of 9.5 and 12.5mm. The RoHS-compliant components’ encapsulation is made of flame-resistant epoxy resin in accordance with UL 94 V-0.

Samples are available now. Production quantities are available with lead times of eight weeks.

Vishay Intertechnology manufactures discrete semiconductors (diodes, MOSFETs, and infrared optoelectronics) and passive electronic components (resistors, inductors, and capacitors). These components are used in electronic devices and equipment, in the industrial, computing, automotive, consumer, telecommunications, military, aerospace, power supplies, and medical markets.

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