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

Name: FT240-3I, ID=1.4", AC/DC/Coax Noise Filter, RFI Range 1-300 MHz, Mini Pack of 3
SKU: F240-31-3
Price: 29.95 USD
Availability: InStock
Rating: 5.0 (4 reviews)

5.0

4 reviews

Store/Ferrite Core Products/Mix 31/Ring - Mix 31 - RFI Range: 1-300 MHz

SKU F240-31-3

$29.95

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Michael H.

Franklin,

United States

Oct 31, 2025

I built one common mode choke, and with the other two I used to greatly reduce interference in my PC speakers that was coming through the low voltage connections from my PC. Good quality and worked well.

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

Store/Ferrite Core Products/Mix 31/Ring - Mix 31 - RFI Range: 1-300 MHz

Product Details

MPN: F240-31-3

Country/Region of Manufacture: China

RFI Range (MHz): 1-300 Mhz

ID-B (in/mm): 1.4/35.6

OD-A (in/mm): 2.4/61

Height-C (in/mm): .5/12.7

Weight (oz/gm): 188 grams

Initial permeability: 1500

Case/Box lot size: 100

Minipack of 3 ferrite ring cores - Very useful for AC/DC power, coax cable common mode current suppression. For highest choking resistance, wrap cable through center of ring as many turns as possible. DO NOT use for impedance transformers (2:1, 4:1, 9:1, etc.) - use Mix 43 or Mix 61 for high power.