Reliable in harsh environments and at high temperatures

Kemet has expanded its range of metallised polypropylene film EMI suppression capacitors with the R53B series. They are designed to operate reliably at temperatures up to 125°C and meet UL94V-O specifications thanks to an envelope of self-extinguishing resin in the housing.

Target applications include capacitive power supplies, three-phase UPS, smart metering and microinverters for solar applications. They also suit automotive applications like on-board chargers. The capacitors are available in tape and reel packaging according to IEC 60286-2.


The R53B series relies on X2 technology which combines THB class IIIB, miniaturized dimensions, high capacitance value and low halogen content. They also meet the requirements for climate class 40/110/56, IEC 60068-1, are AEC-Q200 certified and RoHS compliant.


Capacitance ranges from 0.068 to 20μF at a recommended DC voltage of ≤1000VDC and a rated AC voltage of 350VAC 50/60Hz or rated DC voltage of 800VDC. Service life is 1,000h at -40 to 125°C.