FN409-13-02

**DATASHEET PCB Filters FN 409** fe 

## **75 VDC Input PCB Filter** 

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Rated currents from 3 to 13 A, 75 VDC<br>Very compact PCB-mounting design<br>Exceptional attenuation performance<br>oo High frequency noise compression ee<br>**----- End of picture text -----**<br>


## ee **Approvals** 

**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** 

## **Technical specifications** 

**Maximum continuous operating voltage 75 V Rated currents 3 to 13 A High potential test voltage VI1/VI2 –> GND 2000 VDC for 2 sec VI1 –> VI2 100 VDC for 2 sec Temperature range (operation and storage) -40 °C to +100 °C (40/100/21) Design corresponding to UL 1283, CSA 22.2 No. 8 1986, IEC/EN 60939 Flammability corresponding to UL 94 V-0 MTBF @ 40°C/230V (Mil-HB-217F) 4,450,000 hours** 

## **Typical applications** 

l **Input or output filter for high frequency DC/DC converters** ~~PO~~ **DC output filter for switch-mode power supplies** ~~PO~~ **Computer and office automation equipment Telecom equipment** l **Input/output filter within DC power distribution networks** 

## **Typical electrical schematic** 

> **Schaffner Group** po **Datasheets 2014** 

> 2 **EMC/EMI Products** 

## **Filter selection table** 

|**Filter**|**Rated current**|**Inductance**|**Inductance**|**Capacitance**|**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** 

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3 A types<br>**----- End of picture text -----**<br>


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6.5 A types 13 A types<br>**----- End of picture text -----**<br>


## **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** 

**Schaffner Group Datasheets 2014** 

> 3 **EMC/EMI Products** 

## **Dimensions** 

|**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** 

ground **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.** 

**Schaffner Group Datasheets 2014** 

> 4 **EMC/EMI Products** 

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