The FN 3311-250-99-C16-R55 from Schaffner is a EMI / EMC Filter with Voltage Rating 300 to 520 V, Current Rating 250 A, Leakage Current 0.06 mA, Temperature operating range -40 to 100 Degree C. Tags: Chassis Mount. More details for FN 3311-250-99-C16-R55 can be seen below.