These ultra-low leakage powerline filters are designed for secure and safety‑critical systems that demand stringent control of earth leakage current while maintaining very high EMI attenuation over a broad frequency range. Using a low‑leakage, current‑compensated inductor topology with carefully controlled line‑to‑earth capacitance, theSMF911UL series support compliance with TEMPEST and other high‑security EMC requirements without compromising operator safety or protection devices.