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These typically involve insufficiently filtered converters and switch-mode power supplies on different phases, causing current imbalance and significant interference problems.

Employing single-stage filter circuits for each phase and the neutral line, FN 256 filters provide high attenuation of both symmetrical and asymmetrical interference.

Used as a mains input filter, FN 256 filters also increase conducted immunity and thus contribute to overall system reliability.

Choice of connection style as well as filter ratings in line with common fuse values support a fast and easy application-specific filter selection and deployment.

A light weight aluminium housing with a small footprint ensures that the filters can be easily accommodated on control panels and in tight power cabinets.