PCB filters FN 409 75VDC input PCB filter ■ ■ ■ ■ Rated currents from 3 to 13A, 75VDC Very compact PCB-mounting design Exceptional attenuation performance High frequency noise compression Technical specifications Maximum continuous operating voltage: Rated currents: High potential test voltage: Temperature range (operation and storage): Design corresponding to: Flammability corresponding to: MTBF @ 40°C/75V (Mil-HB-217F): Approvals Typical electrical schematic 75VDC 3 to 13A VI1/VI2 –> GND 2000VDC for 2 sec VI1 –> VI2 100VDC for 2 sec -40°C to +100°C (25/100/21) UL 1283, CSA 22.2 No. 8 1986, IEC/EN 60939 UL 94V-2 or better 4,450,000 hours 3 and 6.5A types Cx 2xL 2xL VO2 VI2 VO1 VI1 2xCy GND 13A types Cx 2xL 2xL1 2xL1 VI2 VO2 VI1 VO1 2xCy GND Features and benefits FN 409 PCB filters are designed to surpress ■ High common and differential-mode noise Typical applications ■ suppression. common and differential-mode noise on DC voltage lines. The suppression performance ■ Rated currents up to 13A at 75VDC. is special designed to fulfill the require- ■ Small form factor. ments for high frequency switching DC/ ■ Good thermal conductance. DC/DC converters ■ DC output filter for switch-mode power supplies ■ Computer and office automation equipment 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. Input or output filter for high frequency Telecom equipment Input/output filter within DC power distribution networks > Components > FN 409 Filter selection table Filter Rated current @ 50°C (40°C) L [A] 3 (3.2) 6.5 (7) 13 (14) [mH] 2.9 0.5 0.08 FN 409-3-02 FN 409-6.5-02 FN 409-13-02 Inductance L1 [mH] 0.18 Capacitance Cx Cy [nF] 4700 4700 4700 DC Resistance R @ 25°C per path Input/Output connections [mΩ] 86 18 7.8 -02 -02 -02 [nF] 4.7 4.7 4.7 Weight [g] 30 30 47 Typical filter attenuation Per CISPR 17; A = 50Ω/50Ω sym; B = 50Ω/50Ω asym; C = 0.1Ω/100Ω sym; D = 100Ω/0.1Ω sym 3A types 13A types 6.5A types Mechanical data 3 and 6.5A types 13A types 0.5 5.08 3.8 VI1 VI2 27.9 max. 6.4 5.08 5.08 5.08 All dimensions in mm; 1 inch = 25.4mm Tolerances according: ISO 2768-m / EN 22768-m 50.8 max. 7.4 +1/-0 Ø1 ±0.05 11.7 max. VO1 GND 4.6 0.5 VO2 19.05 3.8 17.8 VI2 50.8 max. Ø0.8 ±0.05 VO2 VO1 VI1 GND 5.08 25.4 3.8 12.1 31.1 5.08 12.7 max. 5.1 +1/-0 40.6 max. > Components > FN 409 Application The filters are intended to be used in DC (VDR, fig. 1) or a transient diode (fig. 2) must voltage is superimposed on DC voltage, VP-P applications per EN/IEC 60950, where no be placed at the input side of the filter module. or VO-P, whichever is larger, should be transient on the DC bus occurs. To protect the For protection against overcurrent place a maintained within the rated voltage range. filter against transient voltages a varistor fuse on each input lead (VI+, VI-). When AC VI1+ Varistor VI2- Input + + Filter module Output FN 409 - VO1+ VO2- VI1+ VI2- Transient diode Input + + Filter module FN 409 - Chassis ground Chassis ground Figure 1: transient protection with a varistor Figure 2: transient protection with a transient diode VO1+ Output VO2- Recommended layout Filter module VI1+ VO1+ VI2- VO2- Chassis ground Note: avoid routing signal tracks or planes under the filter module Your local partner: To find your local partner within Schaffner’s global network, please go to www.schaffner.com May 2008