Schaffner FN258-75-34 3-Phase Power Line Filter

Schaffner FN258-75-34 is a three-phase EMI/RFI line filter designed for inverter and power-drive applications. Housed in a slim book-style enclosure, it offers a 480 VAC rating and a 75 A continuous current rating (at 50°C), with a DC to 60 Hz operating range. The filter employs Schaffner’s multi-stage topology to deliver high attenuation of conducted emissions, helping systems meet EMI limits in three-phase drives and other energy-conversion equipment. It accepts three-phase inputs and provides either solid safety connector blocks or optional wire-output connections, with an IP20 enclosure suitable for indoor use. The FN258 family is specified for overvoltage category III and operates from -25°C to +100°C (derating above 50°C). Typical applications include three-phase variable-speed drives, motor-drive systems, and other energy-conversion devices where EMI suppression is essential.