DATASHEET Two-Stage Filters FN 343 Performance EMI Filter Rated currents from 1 to 10 A Approvals Dual-stage filter Compact housing Integrated earth line choke Features and benefits Performance indicators FN 343 filters are designed for easy and fast chassis mounting Increased attenuation performance based on dual- stage filter design and earth line choke All FN 343 single-phase filters provide an excellent attenuation performance, based on chokes with high saturation and excellent thermal behavior Faston connection Integrated earth line choke Compact design Custom-specific versions on request Technical specifications Typical applications Maximum continuous operating voltage 250 VAC, 50/60 Hz Operating frequency DC to 400 Hz Electrical and electronic equipment Rated currents 1 to 10 A 40C max. Consumer goods High potential test voltage P > PE 2000 VAC for 2 sec Household equipment P > N 760 VAC for 2 sec Power supplies Temperature range (operation and storage) -25C to +100C (25/100/21) Office automation equipment Flammability corresponding to UL 94 V-2 or better Datacom equipment UL 1283, CSA 22.2 No. 8 1986, IEC/EN 60939 Design corresponding to Industrial equipment auxiliary supply MTBF 40C/230 V (Mil-HB-217F) 970,000 hours Typical electrical schematic2 EMC/EMI Products Schaffner Group Datasheets 13 Feb 2019 Filter selection table Filter Rated current Leakage current* Inductance Capacitance Resistance Input/Output Weight 40C (25C) 230 VAC/50 Hz L L1 L2 Cx Cy R connections A A mH mH mH nF nF M g FN 343-1-05 1 (1.15) 340 5.9 9.5 0.46 100 2.2 1 -05 160 FN 343-3-05 3 (3.4) 340 1.1 2 0.4 100 2.2 1 -05 160 FN 343-6-05 6 (6.9) 340 0.43 0.77 0.4 100 2.2 1 -05 160 FN 343-10-05 10 (11.5) 340 0.27 0.66 0.4 100 2.2 1 -05 160 * Maximum leakage under normal operating conditions. Note: if the neutral line is interrupted, worst case leakage could reach twice this level. Typical filter attenuation Per CISPR 17 A=50 /50 sym B=50 /50 asym C=0.1 /100 sym D=100 /0.1 sym 1 A types 3 A types 6 and 10 A types Mechanical data Dimensions 1 to 10 A Tolerances A 70 0.5 B 69 0.5 C 30.3 1 D 50 1 E 64.8 1 F 60 0.2 G 27 0.5 H 12.3 0.5 J 25 0.5 K 5.3 L 6.3 M 0.7 N 6.3 x 0.8 All dimensions in mm 1 inch = 25.4 mm Tolerances according: ISO 2768-m/EN 22768-m