Round cable ferrite bead

• Permeability (µ_i):
  500
• Min. impedance (Ohm @ Freq.):
  80 Ohm @ 25 MHz
  150 Ohm @ 100 MHz
• Outer diameter (metric):
  26 mm
• Inner diameter (metric):
  13 mm
• Length (metric):
  28 mm
• Outer diameter (imperial):
  1.02 in
• Inner diameter (imperial):
  0.512 in
• Length (imperial):
  1.102 in

Round cable ferrite bead

Common applications:

• Impedance matching
  In power HF transformers on the output of MOS-FET or bipolar transistors, the maximum power is estimated at about 500/1000W, see application example
  
  
• Choke and EMI filter up to 500 MHz
  Typical impedance
  

  Frequency	1 turn	3 turns
  10 MHz	74Ω	700Ω
  25 MHz	118Ω	1100Ω
  100 MHz	210Ω	700Ω
  250 MHz	260Ω	280Ω

   
• Common mode rejection choke on coaxial cables
  When on the screen of a coaxial cable there is a RF current it is necessary to include a common mode choke, this situation often happens when you change from an unbalanced impedance  to a balanced one (coaxial cable on balanced dipole antenna). This ferrite is compatible with all coaxial cables up to 12mm diameter including RG213, RG214, RG9, BWL400, LMR400, RG393, RG115, etc..., for this application it is recommended a choke impedance of at least 10 times higher than that of the coaxial cable
  

Example of application on coaxial cable

Test conditions: 1m RG213, 35x TF-99
1100Ω @ 1.8 MHz
1900Ω @ 3 MHz
1600Ω @ 10 MHz
750Ω @ 21 MHz
650Ω @ 30 MHz