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

Cleaned up the 120 volt input to my Arduino project. No more random resets and code lockups. The ground lug which must be grounded is very close to the hot power terminals. Beware of shorting out the unit. Will buy again for future Arduino projects.

Connected to a CNC to reduce noise and it seems to work. Based on real world use I would buy this again. Before had some background noise that limited speed - just a little - but still this appears to solve a nagging issue.

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.

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.

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

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.

I installed this unit to clean up erroneous EMI from a variable frequency drive unit. The EMI impeded a hall sensor. Together with the addition of a pair of toroidal ferrite cores, the EMI was eliminated.

Not sure a negative review is correct because they never *said* that these filters would block "common mode" noise - which is caused by having a DC component along with the 120V sine wave. Makes any device that has a transformer in their power supply to vibrate. Not a common issue - typically some of the cheaper DC to AC inverters can have this issue...

Sembra di buona fattura da provare

This thing is amazing. If you’re having any noise issues on a CNC machine, or any machine for that matter. Slap this bad boy on the input AC line and watch as your issues go away. Before adding this my dust collector, PC and connection to the Cnc machine were always dropping in and out. After adding this every issue went away. And it’s so easy to install. Can’t recommend this enough!

No cumple su función.

It works. After I installed LED lights in my garage, the range of my door opener remote shrunk by about 3-4 feet. Then, I got this and installed it on the power line of the LED lights. And it’s perfect!

Aspettative totalmente soddisfatte. Il suo doppio filtro mi consente di sopprimere in modo quasi totale le interfernze generate dall'alimentatore del PC e che prima disturbavano in modo noioso il mio ricevitore a Onde Corte. Consigliatissimo!