Schaffner Multi-stage EMI filters Schaffner Multi-stage EMI filters are three-phase EMC/RFI, low-leakage multi-stage filters in modern plastic housings simplify handling and reduce installation time. Using plastic materials and eliminating potting compound results in 50% weight reduction compared to conventional EMC components. Metal base plate ensures EMC-compliant high-frequency contact-to-ground. Features spring mechanism to raise clamping fixture for easy wire attachment, transparent safety covers protect against unintended contact with live conductors, and two mounting options provide flexibility for application-compliant installation of filter.