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What is an EMI Filter?

An EMI filter, or electromagnetic interference filter, is an electronic passive device which is used in order to suppress conducted interference that is present on a signal or power line. EMI filters can be used to suppress interference that is generated by the device or by other equipment in order make a device more immune to electromagnetic interference signals present in the environment. Most EMI filters consist of components that suppress differential and common mode interference.

Types of EMI Filters

There are many different kinds of EMI filters. At Future Electronics we stock many of the most common types categorized by type, case size / dimension, impedance, maximum DC resistance, capacitance and rated current. The parametric filters on our website can help refine your search results depending on the required specifications.

The most common values for capacitance are 100 pF, 470 pF, 1 nF, 2.2 nF and 22 nF. We also carry EMI filters with capacitance up to 27 µF. Rated current can have a range between 1 mA and 100 A, with the most common EMI filters having a rated current of 200 mA, 300 mA, 2A or 6 A.

EMI Filters from Future Electronics

Future Electronics has a full EMI filter selection from several manufacturers that can be used to design an RFI EMI filter, DC EMI filter, AC EMI filter, 3 phase EMI filter, Ethernet EMI filter, EMI air filter, EMI line filter, EMI suppression filter, EMI power filter, EMI noise filter or any circuit that may require an EMI filter. Simply choose from the EMI filter technical attributes below and your search results will quickly be narrowed in order to match your specific EMI filter application needs.

If you have a preferred brand, we deal with several manufacturers such as Murata, Panasonic Industrial Devices, TDK, TE Connectivity or Tokin, among other manufacturers. You can easily refine your EMI filter product search results by clicking your preferred EMI filter brand below from our list of manufacturers.

Applications for EMI Filters:

Typical EMI filter applications include:

  • Data lines
  • Secondary power supply lines for digital audio / video and communications equipment
  • Computer motherboards
  • USB hubs
  • Printers
  • Hard disk drives
  • CD and DVD ROMs
  • AC adapters
  • Electronic musical instruments

Choosing the Right EMI Filter:

When you are looking for the right EMI filters, with the FutureElectronics.com parametric search, you can filter the results by various attributes: by Type (Capacitor Type, LC Combined Type, Line, …), Case Size/Dimension (0805, 1206, 2606,…) and Rated Current (from 1 mA to 100 A) to name a few. You will be able to find the right EMI filter to design an AC or DC EMI filter, RFI EMI filter, 3 phase EMI filter, EMI air filter, Ethernet EMI filter, EMI line filter, EMI suppression filter, EMI noise filter, EMI power filter or to design any circuit that may require an EMI filter.

EMI Filters in Production Ready Packaging or R&D Quantities

If the quantity of EMI filters that you require is less than a full reel, we offer customers many of our EMI filter products in tube, tray or individual quantities that will help you avoid unneeded surplus.

In addition, Future Electronics offers clients a unique bonded inventory program that is designed to eliminate potential problems that could arise from an unpredictable supply of products containing raw metals and products with long or erratic lead times. Talk with your nearest Future Electronics branch and find out more on how you can avoid possible shortages.





Manufacturer Part Number Description
Murata DSS6NC52A102Q55B DSS Series 8 x 7 mm 1000 pF 6 A 100 V Radial Capacitor Type EMI Filter
Murata NFL21SP206X1C7D NFL Series 0805 240 pF 100 mA 16 V SMT LC Combined Type EMI Filter
Murata NFM41PC204F1H3L NFM Series 1806 0.2 uF 2 A 50 V SMT Chip Capacitor Type EMI Filter
Murata DSS9NC51H223Q55B DSS Series Ø 12 mm 22000 pF 7 A 50 V Radial Capacitor Type EMI Filter
Murata NFM18PC105R0J3D NFM Series 0603 1 uF 4 A 6.3 V SMT Chip Capacitor Type EMI Filter
Murata NFE31PT471F1E9L NFE Series 1206 470 pF 6 A 25 V SMT LC Combined Type EMI Filter
Murata NFM21PC105B1A3D NFM Series 0805 1 uF 4 A 10 V SMT Chip Capacitor Type EMI Filter
Murata NFA31CC102R1E4D NFA Series 1206 1000 pF 200 mA 25 V SMT Chip Capacitor Type EMI Array
Murata NFM21CC222R1H3D NFM Series 0805 2200 pF 1000 mA 50 V SMT Chip Capacitor Type EMI Filter
Murata NFM3DCC102R1H3L NFM Series 1206 1000 pF 300 mA 50 V SMT Chip Capacitor Type EMI Filter
Murata NFE61PT361B1H9L NFE Series 2606 360 pF 2 A 50 V SMT LC Combined Type EMI Filter
Murata NFW31SP206X1E4L NFW Series 1206 200 mA 25 V 20 MHz Chip EMIFIL LC Combined Type EMI Filter
Panasonic Industrial Devices ELK-E103FA ELK-E1 series 2A, 0.02 ohm typ.,1000pF, 0.5MHz Cut-off
Panasonic Industrial Devices EXC-CL4532U1 EXC-CL series 115 ohm impedance, 2A 7 inch Reel
Panasonic Industrial Devices EXC-3BB221H EXC-3B series 220 ohm(100MHz), 7 inch reel 200mA
TDK ACH4518-333-TD01 ACH Series 33000 Ohms 2 Amps SMD Unshielded EMI Filter
TDK ACH4518-471-TD01 ACH Series 1812 0.04 Ohm 2 A 50 V SMT Power Line 3-Terminal Filter
TDK ACF321825-332-TD01 ACF Series 300 mA 0.15 Ohm DCR 3-Terminal Signal Line EMI Filter
TE Connectivity 1-6609113-4 C Series 10 A 1.61 x 1.22 mm Power Entry Snap-in Filtered EMI/RFI Filter
TE Connectivity 6609006-6 EEJ Series 3 A Flange Mount Enhanced Performance (1-20 Amp) EMI Filter
TE Connectivity 8-1609095-8 HFB3 Series 0.5 A 250 Vac/dc (3 X 1.42 X 0.875) in 50 Ohm RFI Filter
TE Connectivity 8-1609095-9 2FB3 Series 2 A 250 Vac/dc (3 X 1.42 X 0.875) in 50 Ohm RFI Filter
Tokin ESD-SR-160 ESD-SR Series Snap-on Cores for Round Cables EMI Filter
Tokin EFA(03)-240X240T08 EFA Series 240x240 mm 0.3 mm Thickness 10 GHz Frequency EMI Flex Suppressor
Tokin EFF(01)-240X240T08 EFF(01) series 240X240mm EMI Filter Flex Suppressor Sheet

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