---
product_id: 97967858
title: "AC 115/250V 20A CW4L2-20A-S Noise Suppressor Power EMI Filter"
brand: "dcs"
price: "₩72899"
currency: KRW
in_stock: true
reviews_count: 7
url: https://www.desertcart.kr/products/97967858-ac-115-250v-20a-cw4l2-20a-s-noise-suppressor-power
store_origin: KR
region: South Korea
---

# 20A Current Compact Size AC 115/250V AC 115/250V 20A CW4L2-20A-S Noise Suppressor Power EMI Filter

**Brand:** dcs
**Price:** ₩72899
**Availability:** ✅ In Stock

## Summary

> 🔧 Elevate Your Power Game!

## Quick Answers

- **What is this?** AC 115/250V 20A CW4L2-20A-S Noise Suppressor Power EMI Filter by dcs
- **How much does it cost?** ₩72899 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/97967858-ac-115-250v-20a-cw4l2-20a-s-noise-suppressor-power)

## Best For

- dcs enthusiasts

## Why This Product

- Trusted dcs brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Easy Installation:** With a convenient 7.5cm hole distance, setup is a breeze.
- • **Compact Dimensions:** Measuring just 6 x 5.5 x 3cm, it fits effortlessly into any space.
- • **Powerful Performance:** Experience seamless operation with a robust 20A rated current.
- • **Sleek and Sturdy Design:** Crafted from durable metal, this filter combines style with strength.
- • **Versatile Voltage Compatibility:** Designed for both AC 115V and 250V, perfect for diverse applications.

## Overview

The AC 115/250V 20A CW4L2-20A-S Noise Suppressor Power EMI Filter is a high-performance device designed to enhance electrical efficiency and reduce electromagnetic interference. With a robust metal construction and compact dimensions, it is ideal for both residential and commercial applications.

## Description



## Images

![AC 115/250V 20A CW4L2-20A-S Noise Suppressor Power EMI Filter - Image 1](https://m.media-amazon.com/images/I/61wDwzSBjHL.jpg)
![AC 115/250V 20A CW4L2-20A-S Noise Suppressor Power EMI Filter - Image 2](https://m.media-amazon.com/images/I/61CRbyzHaxL.jpg)
![AC 115/250V 20A CW4L2-20A-S Noise Suppressor Power EMI Filter - Image 3](https://m.media-amazon.com/images/I/618oyudvWnL.jpg)

## Questions & Answers

**Q: What's the best wiring connectors to use for these?**
A: Use insulated crimp-on ring terminals, with a hole size just large enough for the studs on the device.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Does a very nice job!!!
*by R***E on June 29, 2021*

What I liked...Very well made, hermetically sealed, feels very solid, good quality hardware, easy to install, very effective at eliminating the EMI/RFI from my Pioneer heat pump.What I didn't like...NOTHING!!This filter works fantastic. Just installed a Pioneer 24K BTU heat pump. The heat pump works very well, but it did produce a fair amount of EMI (electromagnetic interference) in the household wiring, and the wiring between the inside & outside heat pump units. I used a Tri-Field meter to measure for the presence of "Dirty Electricity" on the household electrical mains wiring. There were electrical pulsations from the wiring everywhere, from the electrical panel all the way back to the outside compressor.I simply mounted another electrical cutout box beside the previous outside compressor cutout box, removed the guts, mounted the filter in series with the 240v mains, secured the box cover to prevent curious fingers, and job complete. (I recommend using #12 Romex wiring pigtails with crimp ring terminals on the filter, then just wire nut the unit in series with the AC mains to the unit.)There was no more measurable EMI in the house, either from the AC mains wiring under the floor, or from the inter-connecting cable from the inside unit to the outside unit. There was also no detectable interference to my Amateur Ham radio station either, which has antenna cables only 12 feet away.Dirty electricity is a real thing. I am electrically sensitive, and my wife is electrically hyper sensitive. If you don't know what dirty electricity is, Google it. You may be surprised!!!Most all "Energy Efficient/Energy Saving" electrical equipment pulses the power on & off, creating superimposed pulses on the AC household wiring. To be effective, you must stop these pulses at the source, and this unit does it very well.I also measured the electrical mains from the power company with a "GreenWave" broadband EMI meter before and after heat pump installation. This unit measures the "Dirt" or undesirable pulses on the incoming electrical wiring. One line (L1) was about 103mV, the other (L2) was about 198mV. It is recommended to keep both lines below 100mV (millivolts) for areas of human occupancy. When the heat pump was initially turned on, L1 went to 1400+ mV, and L2 went to 1500+ mV. Not good. After the EMI filter was installed, both lines returned to pre-heat pump installation levels. This says it does it's job. Neither I or my wife are bothered by the heat pump now. Buy one. It works!!

### ⭐⭐⭐⭐⭐ Does what it says it does!
*by T***A on January 19, 2021*

Used this filter for the AC power going into my inverter/VFD powering a 2.2kW spindle for my CNC router @ 220V. Before grabbing this filter, I could barely turn the VFD on without my grbl-based cnc controller going into danger mode and canceling whatever I was doing, even from a meter or two away. The EMI noise from the freakin thing killed a limit switch too! 2 days and -$17 later, and I have a machine I could probably run until the sun burns out. I paired this with some ferrite chokes for good measure, but I can say for sure that this bad boy's doing most of the heavy lifting. If you plan on using it with a VFD, make sure to ground it properly (so not at the VFD's ground, but at a star ground point). YMMV with this thing of course, but it turned my machine from a hunk of scrap to a scrap hunk generator-just like I intended.

### ⭐⭐⭐⭐⭐ My K40 laser is working better than ever
*by L***C on September 14, 2020*

I've had a K40 chinese laser for over a year. One of the mant issues I had was the laser hanging, resetting or loosing conection to the computer every now and then, when some other device was turned on or off.After I installed this filter between the mains connector and the power supply, all these problems just went away.

## Frequently Bought Together

- AC 115/250V 20A CW4L2-20A-S Noise Suppressor Power EMI Filter
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**Shop now:** [https://www.desertcart.kr/products/97967858-ac-115-250v-20a-cw4l2-20a-s-noise-suppressor-power](https://www.desertcart.kr/products/97967858-ac-115-250v-20a-cw4l2-20a-s-noise-suppressor-power)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-26*