Electrical and Electronic Noise Filters
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Allen Avionics
Allen Avionics makes precision custom-built LC noise filters including band pass filters (400 Hz to 500 MHz), high pass filters (100Hz to 1000MHz), low pass filters (50Hz to 5000MHz; 20, 200, 500, and 1000 watts), and diplexers, with applications including microwave filtering.Website: Allen Avionics -
Americor
Americor makes several EMI/RFI filters including LC filters and those that can be made to medical grade specifications and come in single (up to 30 Amp.) and three phase models (up to 250 Amp.), as well as power entry modules.Website: Americor -
Capcon International
Capcon International makes several EMI noise filters, including low pass filters and miniature sized component filters as well as microwave absorbers and other absorbative filters. Their minuature models filter either AC or DC power lines for up to 10 Amps at 50VDCW, 100VDCW, or 115VACW. Capcon also offers military grade filters.Website: Capcon International -
Captor Corp
Captor makes several noise filters including EMI filters and telephone and signal line filters, which can be made to military grade specifications. Their signal line filters pass band at <3 dB at 4kHz to <0.5 dB at 0-1kHz on VAC or VDC lines while their EMI filters offer several termination interfaces including threaded terminals, solder terminals, connectors (commercial, military grade, IEC, many more), and wire leads & harnesses.Website: Captor Corp -
Coilcraft
Coilcraft makes many EMI/RFI filters including surface mount and leaded components, LC filters, and signal line filters, which work on RJ-45, RJ-15, and RJ-11 lines. Their LC filters include high and low pass models and feature less than 0.3 dB insertion loss with 50 or 75 Ohm characteristic impedance.Website: Coilcraft -
Coilws.com
Coilws.com makes several EMI/RFI filters including leaded filters, LC filters, and surface mount components. Their low power Line Filters for video signals have a current rating of 700 to 500 mA with inductace of 10 to 80 uH, while their high power common mode Line Filters come in horizontal or vertical mount models with current ratings of 0.38 to 6.0 amps AC and inductance of 1 to 120 mH.Website: Coilws.com -
Corcom
Corcom Products makes EMI/RFI filters including LC filters, Power Line filters, ISM filters, Signal Line filters, Power Entry modules, DC filters and facility filters. Their power entry modules have a current rating of 1 to 15 Amps, while their DC filters have a current rating of 1 to 125 Amps. Corcom filters can be used for microwave filtering as well as medical and military applications.Website: Corcom -
Cosel USA
Cosel makes component sized Din rail mountable AC and DC (±50 VDC) noise filters with a rated current from 1 to 30 amps, single phase (250 V) and three phase models (500V).Website: Cosel USA -
DCI Digital
DCI Digital makes custom noise filters including Band Pass filters, high and low pass filters, component sized filters, and ISM filters. Also available are diplexers, with channel isolation from >39dB to >90dB. Models can be built to military specification and are used in fixed and mobile military installations with many frequencies available starting at 30MHz.Website: DCI Digital -
DJM Electronics
DJM Electronics makes several RFI/EMI filters including power line, facility, and signal line filters as well as custom filters, running on AC or DC lines. Their power line filters have a current rating of 10 to 250 Amps, while their standard facility filters have a rating of 2X5 amps to 4x300 amps.Website: DJM Electronics -
Filter Concepts
Filter Concepts makes many EMI filters including AC filters, DC filters, three phase filters, and Custom filters, with applications including medical, motion control, or military spec ground equipment. Their high performance three phase filters have either 16A/PH or 24A/PH rating with leakage of 1.8mA, while their high performance switch mode EMI filter (AC) has current ratings from 1.5A to 45.0A with leakage from .45mA to 1.5mA.Website: Filter Concepts -
Filtronetics
Filtronetics makes custom EMI/RFI noise filters such as bandpass, high pass, bandstop, and lowpass filters, with frequencies of >1MHz to 6GHz. They also have LC filters, diplexers, surface mount models, and ISM filters. Some applications include military and microwave filtering.Website: Filtronetics -
Genisco
Genisco makes EMI/RFI filters including signal line filters, power line filters, and facility filters as well as custom filters that can even be built to military specifications and cover a broad range of power and frequency requirements. Their Low pass signal line filters include a general communications filter which is dual circuit and have a maximum voltage rating of 100 VDC/30 VAC or 400 VDC/125 VAC and current rating of 0.5 or 1 amp.Website: Genisco -
ICT
ICT makes DC Noise/RFI filters with continuous output currents of 12, 25, or 40 amps, peak output currents of 16, 35, or 55 amps, a filter frequency range of 10 Hz - 200 MHz, and input voltage of 0.1-100VDC.Website: ICT -
KR Filters
KR Electronics makes custom and standard filters for commercial and military uses including Low Pass filters, high pass filters, band pass filters, LC filters, Diplexers, and surface mount filters. Their low-pass filters have a cutoff frequency of 5 HZ to 500MHz, while their bandpass filters have a center frequency of 220 Hz to 875 MHz.Website: KR Filters -
LCR Electronics
LCR Electronics designs and manufactures EMI/RFI filters such as power entry filters, power line filters, signal line filters, and facility filters. Their power entry filters have a max rated voltage of 250VAC with a rated current of 1-20A (filters) and 1-10A (modules) and an operating frequency of 50 or 60Hz. Applications include industrial three phase controllers, medical grade filters, microwave filtering, military spec filters, and appliances.Website: LCR Electronics -
Microwave Filter Company
Microwave Filter Company makes noise filters and components including LC filters, band-pass filters, miniature filters, ISM filters, and Diplexers. Their high quality passive filters operate on 5 Hz to 50 GHz frequencies and their WiMax diplexers use bands which are mutually isolated by a minimum of 55 dB with a maximum 1dB of insertion loss per band.Website: Microwave Filter Company -
MTE Corp
MTE makes single and three phase EMI/RFI filters, including LC filters, operating at 50/60Hz in ratings up to 600 volts with applications including AC and DC motor drives, and Active Harmonic Filters.Website: MTE Corp -
MTK Electronics
MTK Electronics makes noise filters including EMI/RFI filters, Signal Line filters, and power line filters. Their RFI/EMI filters are for 5 to 300 Amps with maximum voltage of 250AC/600DC and a power line frequency of 0-400Hz and can be built to military specifications.Website: MTK Electronics -
MtronPTI
MtronPTI makes custom noise filters including LC filters, with a frequency range from 0.000 to 5000.000 MHz, available as surface mount, through-hole or connectorized with an Input/Output Signal to 200-Watt and higher. Also available are microwave filters and mil-spec filters, with certification for MIL-STD-790, MIL-PRF-3098, and MIL-PRF-55310.Website: MtronPTI -
Newmar Power
Newmar Power makes noise filters including Signal Line filters, LC filters, RFI rilters, and DC filters, with models rated at 150 Amp., 10 Amp., and 25 Amp. designed to run on 6-48 VDC systems.Website: Newmar Power -
Nextek Lightning
Nextek Lightning makes EMI High Current DC lowpass filters in 50, 100, 175, and 250 Amp models, which all have a hugh insertion loss of over 60dB, an RF current of over 10 Arms, operate at high frequencies, from 1 kHz to >1GHz.Website: Nextek Lightning -
Okaya
Okaya makes single phase and three phase EMI/RFI noise filters for AC power lines with single phase voltage ratings of 250VAC, 500VAC, 125VAC, and 2VAC with a current range of 1-300Amp, while the three-phase models voltage ratings of 250VAC, 500VAC, 460VAC, and current range from 5-700Amp.Website: Okaya -
PA&E
PA&E makes ceramic EMI/RFI filters for use in electronic packaging including microwave high-frequency packages, a flexible leaded filter with a rated voltage from 50 - 500VDC and a rated current of 5 Amperes, and broadband low-pass filters with insertion-loss of 20, 40, or 60dB/decade with voltage ratings from 50 VDC to 240 VAC and current ratings of .10Amp to 50Amp. Applications include microwave filtering, medical grade, and military specifications.Website: PA&E -
Qualtek USA
Qualtek makes EMI filters including power entry filters with Amp ratings of 1, 2, 3, 4, 6, 10, or 20V, IEC connector filters, chassis mount filters, and multi-function module filters as well as medical grade filters with Amp ratings of 3, 6, or 10V.Website: Qualtek USA