Ferrite Cores

Supplier of Ferrite Cores for Transformers, EMI/RFI Filters, and Sensors

Magnetics^® is a supplier of soft ferrite cores, which are are an oxide made from Iron (Fe), Manganese (Mn), and Zinc (Zn), commonly referred to as manganese zinc ferrites. They have a low coercivity and are also known as soft magnetic ferrites. Because of their comparatively low losses at high frequencies, they are extensively used in switched-mode power supply (SMPS) and radio frequency (RF) transformers and inductors. Ferrite cores for the high frequency power supply and high quality communication markets are produced in a variety of shapes and sizes for inductors, pulse transformers, high frequency transformers, and noise filters. Notable characteristics of Magnetics ferrite materials are high permeability, good temperature properties, and low disaccommodation. Magnetics offers eleven ferrite materials. The materials range in permeability from 900µ to 15,000µ and are available in a variety of geometries including toroids, shapes and pot cores. Hardware accessories such as bobbins, printed circuit bobbins, clamps, mounts and headers are also available.

Power Design with Ferrite Cores for inductors and transformers.
Designing with Magnetic Cores at High Temperatures

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Ferrite Core Part Number Identification

HOW TO ORDER: MAGNETICS FERRITE CORES HOW TO ORDER: MAGNETICS GAPPED FERRITE CORES

Materials Summary
Material	Initial Permeability	Applications	Material Curves
L	750µ ±25%	Inductors and Power Transformers	L Curves
R	2,300µ ±25%	Inductors and Power Transformers	R Curves
P	2,500µ ±25%	Inductors and Power Transformers	P Curves
F	3,000µ ±20%	Inductors and Power Transformers	F Curves
T	3,000µ ±25%	Inductors and Power Transformers	T Curves
J	5,000µ ±20%	EMI/RFI Filters and Broadband Transformers	J Curves
W	10,000µ ±30%	EMI/RFI Filters and Broadband Transformers	W Curves
M	15,000µ	EMI/RFI Filters and Broadband Transformers	M Curves
C	900µ	Linear Filters and Sensors	C Curves
E	2,000µ	Linear Filters and Sensors	E Curves
V	2,300µ	Linear Filters and Sensors	V Curves

Ferrite Applications

Applications	Desired Properties	Preferred Materials	Available Shapes
Broadband Transformers	Low loss, High µ (permeability), Good frequency response	J, W, M*	Pot cores, Toroids, E, U & I cores, RM, EP cores
Common Mode Chokes	Very high µ	J, W, M*	Toroids, E cores
Converter and Inverter Transformers	Low losses, High saturation	F, L, P, R, T	Toroids, E, U & I cores, Pot cores, RS cores, Planar cores
Differential Mode Inductors	Low losses, High temperature stability, Good stability across load conditions	F, P, R, T	Gapped pot cores, EP cores, E cores, RM cores, Planar cores, PQ cores
Narrow Band Transformers	Moderate Q, High µ, High stability	F, J	Pot cores, Toroids, RM cores, EP cores
Noise Filters	High µ, Good frequency response	J, W, M	Toroids
Power Inductors	Low losses at high flux densities and temperatures, High saturation, Good stability across load conditions	F, L, P, R	Pot cores, E cores, PQ cores, RM cores, Planar cores
Power Transformers	High µ and low losses at high flux densities and temperatures, High saturation, Low exciting currents	F, L, P, R, T	Ungapped pot cores, E, U & I cores, Toroids, EP cores, RS cores, DS cores, PQ cores, Planar cores
Pulse Transformers	High µ, Low loss, High B saturation	J, W, M	Toroids
Telecom Inductors	Low losses, High temperature stability, Good stability across load conditions	F, P, R, T	Pot cores, EP cores, E cores, RM cores, Planar cores

*M material available in toroids

Ferrite Core Comparative Geometry Considerations

	Toroid Core	E Core	EC, ETD, EER Cores	ER, Planar Cores	PQ Cores	Pot Core	DS, RM Cores	EP Core
Core Cost	•	•	• •	• •	• • •	• • •	• • •	• •
Bobbin Cost	N/A	•	• •	N/A	• • •	•	•	• • •
Winding Cost	• • •	•	•	•	•	•	•	•
Winding Flexibility	•	• • •	• • •	•	• •	• •	• • •	• •
Assembly Difficulty	•	•	•	• •	• •	•	• •	• •
Mounting Flexibility	•	• •	• •	•	• •	• • •	• • •	• • •
Heat Dissipation	• •	• •	• •	• • •	• •	•	• • •	•
Shielding	• • •	•	•	•	• •	• • •	• •	• • •

Table Key

•	Lowest cost and/or Worst choice
• •	Medium cost and/or Medium choice
• • •	Highest cost and/or Best choice