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.

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.