Three-phase EMC filters from 1 to 150A

EMI Solutions has introduced three-phase single-stage chassis-mount mains EMI filters aimed at common mode and differential mode suppression.

EMIS 3-Phase MF423-3W EMI filters

Called the MF423-3W series, they come in four footprints:

  • 1-10A: 85 x 51mm
  • 15-40A: 128 x 121mm
  • 50-60A: 100 x 107mm (pictured)
  • 75-150A: 350 x 160mm

EMIS 3-Phase MF423-3W EMI filters

Currents are at 40°C (range is -25 to +85°C) and in each case the first dimension does not include terminals, which include spades and threaded studs.


Operation is over 440 or 520Vac and 50 – 60Hz.


“Customers are supported by an experienced consulting team, a pre-compliance lab and a safety certified standard product,” according to the company.

Applications include variable speed motor drives, frequency converters, welding machines, drilling machines and laser cutters.

Branding itself EMIS, the company is based in Sweden and has been designing and manufacturing EMI filters for more than 40 years.

Find the MF423-3W data sheet here

Steve Bush

Steve Bush is the long-standing technology editor for Electronics Weekly, covering electronics developments for more than 25 years. He has a particular interest in the Power and Embedded areas of the industry. He also writes for the Engineer In Wonderland blog, covering 3D printing, CNC machines and miscellaneous other engineering matters.

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