FT-240-43 / 5943000301 Ferrite Toroid Core, µi=800, for EMI filters and RF baluns

Technical Features

The MagWave T1V-240/050 toroid is a ferrite component from the T1V series, designed for RF and HF applications. Its generous dimensions and 1V (43) ferrite mix make it ideal for noise suppression and impedance transformer construction. This model is fully equivalent to the Fair-Rite 5943003801 or Amidon FT240-43.

• Applications:
  
  • EMI/RFI Suppression (20 MHz – 250 MHz)
  • Balun / RF Transformers (1 MHz – 25 MHz)
• Initial permeability: 800 µi
• Dimensions: outer diameter 61 mm, inner 35.55 mm, height 12.7 mm
• AL (nH): approx. 1030 ±25%
• Curie temperature: above 130 °C

Benefits

• Wide frequency range: ideal for HF
• Noise suppression: excellent for reducing common-mode currents and improving signal quality
• Versatility: compatible with End Fed, OCF antennas and 1:1, 4:1, 9:1 transformers
• Thermal stability: maintains performance even under critical operating conditions

Amidon FT240-43, Fair-Rite 5943003801 and others what is the difference?

The 2.4-inch (61 mm) ferrite toroid with an initial permeability of µi 800 is manufactured by various brands, including Amidon, Fair-Rite, and others. While each model may show slight differences in appearance, dimensions, or AL values, they are technically equivalent.

They can be used as a direct replacement for Fair-Rite 5943003801 and Amidon FT240-43 in equivalent designs.

Our MagWave™ model stands out as a reliable alternative with an excellent price-performance ratio. It offers:

• High build quality
• Technical specifications equivalent to leading brands
• Guaranteed compatibility for 1:1 replacement in both hobbyist and professional projects

Choose MagWave™ for a dependable, high-performance, and cost-effective solution.

Cross reference table