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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

RFI Corp makes EMI/EMC/RFI noise filters including signal line filters, power line filters, facility filters, and component filters.  Their power line filters have a voltage range of 12 Vdc - 5500 Vac and a current rating of 0.01 - 5000 Amp. with a frequency of 50 - 400 Hz and attenuation of 120 db from 9KHz - 18GHz.  Medical grade and military spec models available.

Tusonic makes a wide line of EMI/RFI filters including both AC and DC line models, surface-mount filters, feed-through filters, and custom filters. Other EMC products carried include ceramic variable trimmer capacitors, and radial leaded disc, tubular, and WEECON Plate capacitors.

WEMS Electronics makes EMI/RFI custom filters including power line and signal line filters which meet various military specifications including MIL-PRF 15733, MIL-PRF-28861, MIL-STD-220A, MIL-I-45208, and MIL-STD-202. Services include filter circuit design & analysis, environmental tests, baseline documentation, and more.