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Troubleshooting Type
Noise Filters
UPB Compatible
X10 Compatible
Ease of Installation
Intermediate (Installs < 60 minutes)
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Eliminate Line Noise on an Entire Circuit in Your Home by Wiring in a 20-Amp Filter
ACT AF300 20-Amp Low-Pass Filter
ACT AF300 20-Amp Low-Pass Filter
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Wiring Diagrams
ACT AF300 20-Amp Low-Pass Filter
Item# 4846
Price: Normally $75.00 
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  • Filters noise on an entire circuit in your home
  • Works with a single-phase load, a two-phase load or a three-phase load
  • Filter is rated for 20 amps on a maximum of 277 volts

Essential Info

With numerous electrical devices in today's homes, noise on the electrical line becomes almost unavoidable. But this interference doesn't need to interrupt the X10 signals sent to your devices. Placing a filter between your X10 device and the noisy load blocks the noise and lets X10 signals flow. Now you can protect an entire circuit in your home: The ACT 20-Amp Low-Pass Filter is a 20-amp, hard-wired filter made to block noise from an entire circuit.


What's Included

  • Noise filter
  • 4 screws
  • Instructions
  • More Info

    The ACT 20-Amp Low-Pass Filter wires directly into your circuit-breaker box, so if you have one load on a particular circuit that generates interference, installing this filter can eliminate up to 97.5 percent of this problem noise with its 40-to-1 blocking ratio. In other words, if the noise or signal is at a level of 1 volt peak-to-peak, only about 25mv should leak through.

    This hard-wired noise filter is rated for 20 amps on a maximum of 277 volts.



    Advanced Control Technologies Product No.:AF300
    Dimensions:6 1/2" x 4 1/2" x 2 1/4"
    Input Voltage:277V AC maximum
    Current Draw:20 amps maximum
    Filter Frequencies:Everything over 300 Hz
    Input Voltage Reduction:97.5%
    Approvals:UL listed
    Warranty:2 years, limited

    Important notes:
    Defective exchanges for identical item within 30 days of purchase. After 30 days, please contact the manufacturer.
    Manufacturer contact information: Advanced Control Technology Inc, Tel: (317) 337-0100 Ext 236


    Wiring Diagrams       
    Wiring Diagrams       


    10 Ratings
    5 star: 30%  (3)
    4 star: 20%  (2)
    3 star: 10%  (1)
    2 star: 20%  (2)
    1 star: 20%  (2)
    Average Customer Rating
    (10 customer ratings)
    Share your thoughts with other customers
    DOLORES -- south salem, NY   5/4/2014
    Z714X4 -- SoCal   1/2/2014
    Got excited when reading others had fixed their X10 problems with this so I bought two for my variable speed pool pump Hayward Eco-Star. Installed in a few minutes and they simply worked. I was able to once again control my pool equipment with my X10 remote. My only hesitation is these things are HUGE!! I had to remove from plastic container danger...don't do this and I made my own packaging so I could install both units in my pool controller box don't do this!!. A little pricey and HUGE packaging... but hey, it works!
    JEFFREY -- ventura, CA   8/13/2013
    Very happy with the two filters I bought to quiet a variable speed pool pump. Units arrived in two days! Fantastic. Thank you. Would prefer if the units could live in three gang boxes outdoors. Otherwise, they work great.
    WILLIAM -- vincentown, NJ   7/1/2013
    I installed a Hayward variable speed pool pump and a Hayward salt to chlorine generator this spring. The VS pump and the transformer in the chlorine generator created a lot of noise and interference with my X-10. Everything Insteon worked, but practically nothing X-10 worked when the pump was running. So my choices were to replace all my old X-10 with Insteon, or try these filters. They worked perfectly. I am back to 100% reliability with my X-10. I needed 2 of them since my equipment is 220v, and I had to wire them phase to phase because I wanted them near the pool equipment and there was no neutral wire. (ACT tech support helped me with this) I highly recommend these, especially if you know a new piece of equipment is causing the noise. They work.
    BERNARDINO -- quebec city, QC   11/12/2007
    It is not a Canadian certified (no CSA ou CUL) product!

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