Noise Filters - AC/DC

Store / Noise Filters - AC/DC

Our noise filters are designed to suppress common mode noise on AC/DC power lines, Switching Mode Power Supply (SMPS) input/output, and computer/instrumentation power input/output/control lines. Also suitable for PLC control line noise suppression (use mix 77/75 ferrite filters).

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25-AMP (Peak) IN-LINE ELECTRONIC FILTER for 12 VOLTS DC, AUTOMOTIVE, RV RFI, ALTERNATOR, PULSE NOISE SUPPRESSION

SKU RFI-N700

$49.95

30-AMP (PEAK) IN-LINE TOROIDAL DC NOISE FILTER for 12 VOLTS, ALTERNATOR, PULSE NOISE SUPPRESSION

SKU RFI-N25

$34.95

AC Cable Noise Filter for Large Plugs - 3" ID

SKU ACCF-3

$39.95

AC Cable Noise Filter for Standard 120VAC Plugs - 1.4" ID

SKU ACCF-1.4

$12.95

AC Power Cord Choke + Power Cord- 120VAC RFI Range: 1-30 MHz, -28 dB Noise Reduction, 15 Amp

SKU AC-CHOKE-6

$19.95

Aquarium AC Filter for Heater, Water/Oxygen Pump RFI

SKU AACF-1.4

$12.95

Big Clamp On RFI Noise Filter for AC/DC power lines, Coax/Multi-wire cable - 1" ID

SKU BCO31

$19.95

DC Cable Noise Filter for 2 Gauge and Smaller Wire - 1.4" ID

SKU DCCF-1.4

$12.95

DC Cable Noise Filter for Large Gauge Wire - 3" ID

SKU DCCF-3

$39.95

On Sale

DC Voltage Common Mode Noise Filter - Marine, RV, Communications, 600 Volts/30 Amps

SKU RFI-DC-30

List price ~~$109.95~~

Save 18%

$89.95

DC-AC Inverter Common Mode RFI/Noise Filter Kit for DC in and AC Output

SKU RFI-INVERTER

$34.95

F240-31, ID=1.4", AC/DC/Coax Noise Filter, RFI Range 1-300 MHz, AKA FT240-31

SKU F240-31-1

$9.99

On Sale

FT240-3I, ID=1.4", AC/DC/Coax Noise Filter, RFI Range 1-300 MHz, Bulk Pack of 10

SKU F240-31-10

List price ~~$100.00~~

Save 10%

$89.95

On Sale

FT240-3I, ID=1.4", AC/DC/Coax Noise Filter, RFI Range 1-300 MHz, Mini Pack of 3

SKU F240-31-3

List price ~~$34.95~~

Save 14%

$29.95

FT240-61, ID=1.4", RFI Range 200-2000 MHz

SKU F240-61-1

$16.95

FT240-61, ID=1.4", RFI Range 200-2000 MHz, Bulk Pack of 10

SKU F240-61-10

$149.99

FT240-75, ID=1.4", AC/DC/Coax Noise Filter, RFI Range .15-10 MHz, 10 Pack

SKU F240-75-10

$99.95

Power Pole DC Power Cord RFI/Noise Filter - up to 30dB Noise Reduction, 45 Amp Connectors

SKU PPNF-3

$34.95

Switch Mode Power Supply (SMPS) Common Mode RFI/Noise Reduction Filter Kit

SKU RFI-SMPS

$27.95

Wall Wart RFI Noise Filter Bulk Pack of 10 Filters

SKU RFI-WW-10

$29.95

Wall Wart RFI Noise Filter Bulk Pack of 100 filters

SKU RFI-WW-100

$199.95

Wall Wart RFI Noise Filter Pack (5 filters)

SKU RFI-WW-5

$16.95

50 ohm coax to 75 ohm balanced output baluns are useful for low (< 1 wavelength) dipoles exhibiting 75 ohm characteristic impedance or for matching to balanced ladder line whose endpoint impedance is near 75 ohms.

50 ohm coax to 75 ohm CATV coax connections are easily done with a 1.5:1 unun with SO-239 connectors on input and output. Likewise 50 ohm coax to unbalanced verticals or loads near 75 ohms can be matched with a 1.5:1 unun.