DATASHEET PCB Filters FN 409 75 VDC Input PCB Filter Rated currents from 3 to 13 A, 75 VDC Approvals Very compact PCB-mounting design Exceptional attenuation performance High frequency noise compression FN 409 PCB filters are designed to surpress common and differential-mode noise on DC voltage lines. The suppression performance is special designed to fulfill the requirements for high frequency switching DC/DC converter modules. FN 409 filters can also be used to filter the output current of switch-mode power supplies in applications with intelligent power distribution. Features and benefits High common and differential-mode noise suppression Rated currents up to 13 A at 75 VDC Small form factor Good thermal conductance Typical applications Technical specifications Input or output filter for high frequency DC/DC converters Maximum continuous operating voltage 75 V Rated currents 3 to 13 A DC output filter for switch-mode power supplies High potential test voltage VI1/VI2 –> GND 2000 VDC for 2 sec Computer and office automation equipment VI1 –> VI2 100 VDC for 2 sec Telecom equipment Temperature range (operation and storage) -40 °C to +100 °C (40/100/21) Input/output filter within DC power distribution Design corresponding to UL 1283, CSA 22.2 No. 8 1986, IEC/EN 60939 networks Flammability corresponding to UL 94 V-0 MTBF @ 40°C/230V (Mil-HB-217F) 4,450,000 hours Typical electrical schematic

2 EMC/EMI Products Schaffner Group Datasheets 2014 Filter selection table Filter Rated current Inductance Capacitance DC Resistance R Input/Output Weight @ 50 °C (40 °C) L L1 Cx Cy @ 25 °C per path connections [A] [mH] [mH] [nF] [nF] [mΩ] [g] FN 409-3-02 3 (3.2) 2.9 4700 4.7 86 -02 30 FN 409-6.5-02 6.5 (7) 0.5 4700 4.7 18 -02 30 FN 409-13-02 13 (14) 0.08 0.18 4700 4.7 7.8 -02 47 Typical filter attenuation Per CISPR 17; A = 50 Ω/50 Ω sym; B = 50 Ω/50 Ω asym; C = 0.1 Ω/100 Ω sym; D = 100 Ω/0.1 Ω sym 3 A types 6.5 A types 13 A types Mechanical data 3 and 6.5 A types 13 A types All dimensions in mm; 1 inch = 25.4 mm Tolerances according: ISO 2768-m / EN 22768-m

3 EMC/EMI Products Schaffner Group Datasheets 2014 Dimensions 3 A 6.5 A 13 A A 51 51 50.8 B 27.9 27.9 40.6 C 8.2 8.2 12.7 D Ø0.8 Ø0.8 5.1 E 0.5 0.5 Ø1 F 11.7 11.7 0.5 G 3.9 3.9 3.8 H 12.1 12.1 6.4 I 31.1 31.1 17.8 J 4.6 4.6 25.4 K 19.05 19.05 5.08 Application The filters are intended to be used in DC applications per EN/IEC 60950, where no transient on the DC bus occurs. To protect the filter against transient voltages a varistor (VDR, fig. 1) or a transient diode (fig. 2) must be placed at the input side of the filter module. For protection against overcurrent place a fuse on each input lead (VI+, VI-). When AC voltage is superimposed on DC voltage, VP-P or VO-P, whichever is larger, should be maintained within the rated voltage range. Figure 1: transient protection with a varistor Figure 2: transient protection with a transient diode Recommended layout Note: avoid routing signal tracks or planes under the filter module Please visit www.schaffner.com to find more details on filter connectors.

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