Electromagnetic interference can significantly degrade the performance of electronic devices, while impedance mismatches may prevent carefully designed circuits from operating at peak efficiency. The FT240-43 ferrite toroid offers an effective solution to these common challenges in radio frequency and wireless communication systems.

Key Advantages of FT240-43

Manufactured from type 43 material, the FT240-43 ferrite toroid delivers exceptional common-mode rejection across a broad frequency range from 10 MHz to 600 MHz. This capability enables effective filtering of unwanted common-mode noise, resulting in improved signal quality, reduced interference, and enhanced system reliability.

Technical Specifications

The performance characteristics of the FT240-43 are defined by several critical parameters:

• AL (nH): 1075 ±20% - The inductance coefficient determines the inductance generated per specific number of turns.
• Ae (cm²): 1.58 - The effective cross-sectional area relates to the core's magnetic flux capacity.
• Σl/A (cm⁻¹): 9.2 - This ratio of magnetic path length to effective area reflects the core's magnetic characteristics.
• le (cm): 14.5 - The effective magnetic path length influences inductance and magnetic resistance.
• Ve (cm³): 22.8 - The effective volume affects power handling and thermal dissipation.

Dimensional Specifications

Precise dimensions ensure proper component installation and performance:

• Outer diameter (A): 61 mm (±1.3 mm)
• Inner diameter (B): 35.55 mm (±0.85 mm)
• Height (C): 12.7 mm (±0.5 mm)

Material Properties

The type 43 material provides the FT240-43 with its distinctive performance characteristics:

• Initial permeability (µi): 800
• Flux density (B @ H): 2900 Gauss @ 10 Oersted
• Residual flux density (Br): 1300 Gauss
• Coercivity (Hc): 0.45 Oersted
• Loss factor: 250 @ 1.0 MHz (10⁻⁶)
• Temperature coefficient: 1.25 %/°C (20-70°C)
• Curie temperature (Tc): >130 °C
• Resistivity (ρ): 1×10⁵ ohm-cm

Applications

The FT240-43 serves multiple functions in electronic circuit design:

• Common-mode chokes: Effective for suppressing interference in power lines and signal cables.
• Impedance transformers: Facilitates matching between different impedance levels, particularly useful in antenna systems (2-50 MHz range).
• Baluns: Converts between balanced and unbalanced signals, improving antenna radiation efficiency.

The FT240-43 ferrite toroid represents a versatile component for addressing various challenges in RF and wireless system design, offering reliable performance across multiple applications.