Uxcell AC 115/250V 20A CW4L2-20A-S Noise Suppressor Power EMI Filter

I use these AC line filters as a pre filter before my switching power supply when I’m redoing the wiring for arcade cabinets. They work great and are easy to use. The ground terminal is a little close to one of the AC terminals so just make sure you don’t have any stray wires. Other than that these work perfectly and I recommend purchasing them.

This AC filter lowered the radiated noise from the power cord running to my meanwell 48V power supply to below what I could detect on my radios. Prior to filtering it was raising the noise floor by over 5dB. Fits fine in an electrical junction box for in-line use without exposed mains voltage.

This works great. Had a lot of RFI from an inverter generator interfering with my radio equipment. This fixed it. It does need to be grounded to work effectively though.

Only criticism would be the earth (case) ground is fairly close to the power terminals.

My frequency drive unit was putting out so much noise into my electrical AC that it would either kick out my DSL modem, or at the very least, slow it down substantially. I added this to my incoming 220 volts to my Frequency Drive unit. I also used ferrite cores (Uxcell a12022900ux0327) to the wires and also put my output wires of my Frequency Drive into grounded seal tite. My problem completely went away.

Not enough labeling, no clue as to which terminal is for live wire and which for neutral. Magic smoke release candidate.

Installed inline for CNC system to mitigate noise from other equipment on the mains power line. The outputs are connected directly to large power supply unit. Typically quality power supplies have filtering built in; however, I added this to assist power supply in maintaining clean power but removing most of the internal circuitry filtering work. It's all about maintaining consistency to ensure longevity and performance of system. An inline fuse was also added on the input (Mains Line) side of filter as extra safety precaution.

Worked perfect. I had an emf issue when the spindle was on it caused the touchscreen to go crazy and rendered it unusable. Took 15 mins to wire this up. With this and a few toroidal cones it filtered out the emf.