Ferrites for EMI filters and broadband transformers

The most appropriate and cost-effective material for Common Mode Chokes (CMC) and signal transformers are ferrites that offer the highest impedance in the frequency band of the unwanted noise signals.

Broadband and pulse transformers benefit from high perm materials in addition to low losses, high Bsat, and good frequency response: all characteristics offered by Magnetics Inc. high perm materials.

J is medium perm general-purpose, well used for EMI filters and broadband transformers. W has set the industry standard for high perm materials offering 20-50% more impedance in filters also used in transformers. M has been designed for optimum impedance performance across frequency ranges, can be used in signal processing, broadband transformers, and EMI filters.

All materials are available in Toroids and in shapes like E, U, Pot Cores, RM, and EP.

Ferrites for EMI filters and broadband transformers

Range features

A high level overview of what this range offers

  • High permeability
  • Optimum frequency and impedance performances
  • Available in toroids and shape like E, U, I, RM, EP, and pot cores
  • MnZn only ferrite materials
  • J material medium permeability for a wide range of applications
  • W superior material in mid-range frequency (2-20MHz)
  • M new material with the highest perm 15000
  • Applications: EMI CMC filters, broadband transformers, pulse transformers, and noise filters

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for Ferrites for EMI filters and broadband transformers

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Magnetics Inc ferrite materials summary
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What’s in this range?

All the variants in the range and a comparison of what they offer

Materialµi at 25°CBsat (mT) at 25°CTc (°C)Resistivity ρ Ω*mNotes

J

5000

430

145

0.5

General-purpose

W

10000

390

135

0.1

Higher Z @ <1MHz

M

15000

470

130

0.5

Highest Z @ 120KHz