EV/EH RFI Suppression Chokes Schaffner EV/EH RFI Suppression Chokes are common-mode suppression chokes mainly used to filter noise on AC power lines. Schaffner EV/EH series RFI suppression chokes feature rated currents up to 5A, broadband attenuation characteristics, UL-rated materials, RoHS compliance, compact and lightweight design, low magnetic leakage flux, sectional winding, standard footprint, broad range of available inductances and current ratings, and custom-specific versions. Typical applications for the EV/EH series suppression chokes are input filters for switch mode power supplies, filters to reduce leakage noise, TVs/VCRs/multimedia/audio equipment, electric ballast, AC/AC converters, and office automation, communications, and other electronic devices.