DATASHEET 3-Phase + Neutral Line Filters FN355 Ultra-compact Low Leakage current EMC/EMI Filter Ultra-compact four-wire filter for applications Approvals & Compliances lacking space Exceptional low operating leakage current Equally suitable for star and delta power networks Features and benefits Performance indicators The FN 355 family of three-phase and neutral line filters provides a cost-effective interference suppression solution for a wide variety of applications Available in four versions, with current ratings from 3 to 20 A, the filters employ a single-stage four-wire LC circuit with saturating resistant chokes, and have a very low operational leakage current FN 355 filters are contained within an extremely compact metal housing, making them ideal for use in situations where space is at a premium Technical specifications Typical applications Maximum continuous operating voltage 3x 440/250 VAC Office equipment Operating frequency DC to 400 Hz Rated currents 3 to 20 A 40C Medical equipment P/N > E 2000 VAC for 2 sec High potential test voltage General purpose four-wire filtering P > P 1350 VDC for 2 sec Applications with tight space conditions P -> N 800 VAC for 2 sec Overload capability 4x rated current at switch on, 1.5x rated current for 1 minute, once per hour Typical electrical schematic Temperature range (operation and storage) -25C to +100C (25/100/21) Flammability corresponding to UL 94 V-2 or better Design corresponding to UL 1283, CSA 22.2 No. 8 1986, IEC/EN 60939 MTBF 40C/230 V (Mil-HB-217F) 850,000 hours2 EMC/EMI Products Schaffner Group Datasheets 05 Jan 2022 Filter selection table Filter Rated current Leakage current* Power loss Input/Output 40C (25C) 440 VAC/50 Hz 25 C/ 50Hz connections weight A mA W kg FN 355-3-05 3 (3.4) 0.0 1.4 -05 0.15 FN 355-6-05 6 (6.9) 0.0 1.5 -05 0.21 FN 355-10-05 10 (11.5) 0.0 1.8 -05 0.25 FN 355-20-06 20 (23) 0.1 3.4 -06 0.29 FN 355-20-03 20 (23) 0.1 3.4 -03 0.29 FN 355-30-44 30 (34) 0.2 4.1 -44 0.44 * Standardized calculated leakage current acc. IEC60939 under normal operating conditions. Typical filter attenuation Per CISPR 17 A=50 /50 sym B=50 /50 asym C=0.1 /100 sym D=100 /0.1 sym 3 A types 6 A types 10 and 30A types