High Voltage (HV Capacitors) ceramic capacitors are economical capacitors, with high reliability performance. HV Capacitors are ideally suited for applications such as snubbers in high frequency power converters, resonators in SMPS, and high voltage coupling, DC blocking, by-pass circuit.
High voltage ceramic capacitors have two kinds of dielectric (multilayer & disc ceramic ) in current production.
A. For Multilayer Dielectric: NPO/COG, X7R.
This kind of HV capacitors have a multilayer chip MLCC inside, and epoxy coating outside. Some epoxy color is yellow, while like Murata, they produce RPE series radial MLCC with blue epoxy coating.
Actually blue or yellow epoxy are the same for Moisture-proof and fire-proof class.
UF Capacitors (http://www.ufcapacitors.com) CT4 radial multilayer ceramic capacitors,
mono capacitors series, can make HV capacitors from 1000V to 5000VDC. This series can replace AVX SV series with P/N SV07KC332KAR, SV05GC103KAA...
B. For Disc Ceramic Dielectric: Class 1 Capacitors use NPO or SL dielectric; Class 2 capacitors use Y5P, Y5U, Y5V dielectric.
This kind of HV capacitors are disc ceramic capacitors, UF Capacitors offers three series for these.
CT81 high voltage disc ceramic capacitors, from 500VDC to 6000VDC.
X1Y1 safety type, disc ceramic capacitors, normally in 400VAC or 500VAC.
X1Y2 safety type, disc ceramic capacitors, normally in 250VAC
UF Capacitors (http://www.ufcapacitors.com) offers CT81 High Voltage Disc Ceramic Capacitors to replace Vishay S Series, 561R Series, 562R Series, 564R Series, 565R Series and Murata DEB / DHR Series (P/N DEBF33D103ZA3B, DEBB33F222KA3B, DEBE33D103ZECB), DEH / DEA Series, DEB / DEC Series, HBU / HBZ Series, HBE / HBX Series.
Generally speaking, UF Capacitors’high voltage capacitors have wide selection.