R53B series capacitors are THB Grade IIIB, Class X2, 350VAC, 125°C (automotive grade) metallized polypropylene film EMI suppression capacitors for harsh environmental conditions. R53B is constructed of metallized polypropylene film, encapsulated with self-extinguishing resin, in a box of material meeting the requirements of UL 94 V-0. R53B series meets the demanding Automotive Electronics Council's AEC-Q200 qualification requirements. Suitable for worldwide use in electromagnetic interference (EMI) suppression in across-the-line applications that require X2 safety classification. Intended for use in situations in which capacitor failure would not result in exposure to electric shock. Typical applications include connection in series with the mains, capacitive power supplies and energy meters with special emphasis in automotive applications for severe ambient conditions such as on board chargers.