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.

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.

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.

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.

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.

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.

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.

Schurter makes several noise filters including power entry modules, and single and three phase power line filters. Their single phase line filters have a current rating of 0.5A - 36A with voltage of 125VAC or ±80 VDC while their three phase filters have a current rating from 6 - 1100A and run on 440, 480, or 520VAC. In addition, Schurter makes ISM filters and medical grade filters.