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roWaves Technologies

Certified Company ISO 9001-2008

FT240-43 Fair-Rite (ferrite toroid 5943003801)

Colour code: black
Manufacturer code: 5943003801
Ordering code: FT-13
Marking code: 2 x yellow paint side-stripes
Manufacturer part no.: FT240-43
Material no.: 43
AL: 1075nH
Permeability (μi): 800
Frequency range: 0.5 – 500MHz (wideband transformer, depends on the application)
RF max. power: depends on application: 200W CW / 400W SSB on 2pcs. X FT240-43 transformer (64:1 or 49:1 UN-UN)
Temperature stability.: 12500ppm/°C
Ext. diameter: 61mm
Int. diameter: 35.5mm
Height: 12.7mm
Price :

 16,91

16 in stock

* Toroids are tested for AL values at 10KHz.

43 Material – specifications:

ParameterSymbolValueUnits
Initial permeabilityµi800
Flux density @ field strengthB
H
2900
10
Gauss
Oersted
Residual flux densityBr1300Gauss
Coercive forceHc0.45Oersted
Loss factor @ specific freq.Tan δ/ µi250
1.0
10^-6
MHz
Temperature coefficient of initial permeability (20 -70°C)1.25%/°C
Curie temperatureTc>130°C
Resistivityρ1×10^5ohm-cm

Usable frequency ranges, depending on the application:

broadband transformers: 5 – 400 MHz

high-Q inductors: 0.5 – 30 MHz

RFI / EMI / CMC suppression: 5 – 500 MHz


✔️ common mode shocks (CMC): material 43 it is a very good solution for suppressing common broadband currents in the range of 10 – 600 MHz. Along with the increase no. of turns, the suppression increases, while the max. usable freq. will decrease.

✔️ broadband transformers: excellent impedance transformers can be made in the frequency range from 2 to 50 MHz Typical applications are impedance transformers for EndFed antennas, impedance transformers for OCFD antennas or BalUn 1: 1. Full technical specifications (including catalog description) at “Downloads”.

Additional information

Weight 130 g
Dimensions 6.1 × 3.55 × 1.27 cm

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