The FN258HV-75-34 from Schaffner is a EMI / EMC Filter with Voltage Rating 300 to 760 V, Current Rating 75 to 82 A, Leakage Current 2.6 mA, Temperature operating range -25 to 100 Degree C. Tags: Chassis Mount. More details for FN258HV-75-34 can be seen below.