RSAL & RSEL EMI Filters TDK-Lambda RSAL and RSEL series 0.5A to 6A, 250VAC EMI Filters that feature lug or wire terminations and offer a low earth leakage current option is available. The TDK-Lambda RSAL Series has high voltage pulse attenuation. Both series conform to UL, CSA, and EN Safety Agency certifications and are RoHS compliant. Typical applications include medical, industrial, test, and communications markets.