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.

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.

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.

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.

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.

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.