Ferrite Cores

Part Number	Description / PDF	Quantity
B66314G0000X130 TDK EPCOS	FERRITE CORE E N30 1PC	0
B66483G0000X149 TDK EPCOS	FERRITE CORE EQ N49 1PC	2080
B64290L0615X830 TDK EPCOS	FERRITE CORE TOROID 6.93UH N30	879
B64290L0082X087 TDK EPCOS	FERRITE CORE TOROID 4.46UH N87	558
B65839A0000R087 TDK EPCOS	FERRITE CORE EP 1.1UH N87 2PCS	3989
B66423G0000X187 TDK EPCOS	FERRITE CORE EFD N87 1PC	4609
B65843A0100A038 TDK EPCOS	FERRITE CORE EP 100NH T38 2PCS	0
B66395G0000X127 TDK EPCOS	FERRITE CORE ETD N27 1PC	0
B64290A0711X830 TDK EPCOS	FERRITE CORE TOROID 5.2UH N30	32
B64290A0084X830 TDK EPCOS	FERRITE CORE TOROID 5.5UH N30	63
B64290A0048X001 TDK EPCOS	FERRITE CORE	48
B66367G2000X127 TDK EPCOS	FERRITE CORE ETD N27 1PC	0
B65843A0000R045 TDK EPCOS	FERRITE CORE EP 2.4UH N45 2PCS	0
B66363G0100X127 TDK EPCOS	FERRITE CORE ETD N27 1PC	0
B66329G0250X127 TDK EPCOS	FERRITE CORE E N27 1PC	0
B65819N0315A048 TDK EPCOS	FERRITE CORE	0
B64290L0632X087 TDK EPCOS	FERRITE CORE TOROID 2.13UH N87	2267
B65651T0400A048 TDK EPCOS	FERRITE CORE P 400NH N48 2PCS	918
B66297K0000X187 TDK EPCOS	FERRITE CORE I N87	432
B64290L0044X087 TDK EPCOS	FERRITE CORE TOROID 1.12UH N87	1170

Ferrite Cores

1. Overview

Ferrite cores are ceramic compounds made from iron oxide and other metal oxides, sintered to form high-permeability magnetic materials. They exhibit low eddy current losses at high frequencies, making them ideal for electromagnetic interference (EMI) suppression, energy storage, and signal transmission in modern electronics. Their unique combination of high resistivity and magnetic properties enables efficient operation in power conversion systems, telecommunications, and automotive electronics.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
EE/EI Cores	High inductance, easy assembly	Switch-mode power supplies (SMPS)
RM Cores	Compact design, low leakage inductance	DC-DC converters
PQ Cores	High power handling, uniform magnetic path	Automotive battery chargers
EP Cores	360 winding space, mechanical stability	LED drivers
Toroidal Cores	Low electromagnetic radiation, high efficiency	RF filters, current sensors

3. Structure and Composition

Typical ferrite cores consist of:

Base material: Mn-Zn or Ni-Zn ferrite compounds
Geometric shapes: E/I, pot, toroid, planar, or custom geometries
Surface treatment: Coatings (epoxy, parylene) or tape wrapping for insulation
Dimensional tolerances: 1% to 3% depending on manufacturing process

4. Key Technical Specifications

Parameter	Description	Importance
Initial Permeability ( i)	Relative magnetic permeability at 10kHz	Determines inductance capability
Saturation Flux Density (Bs)	Maximum magnetic flux before saturation	Limits power handling capacity
Resistivity ( )	Volume resistivity ( cm)	Controls eddy current losses
Curie Temperature (Tc)	Temperature threshold for magnetic loss	Defines operational temperature limits
Dimensional Tolerance	Geometric precision ( 0.05-0.2mm)	Affects winding compatibility

5. Application Fields

Power Electronics: SMPS, inverters, EV chargers
Telecommunications: Broadband transformers, signal isolators
Automotive: On-board chargers, DC-DC converters
Consumer Electronics: LED ballasts, adapter transformers
Industrial: Motor drives, energy storage inductors

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
TDK Corporation	PC40 Material	High Bs (510mT), low core loss
Ferroxcube	3C90 Material	i=2300, Tc=215 C
Magnetics Inc.	R Material	High stability (-20~125 C)
Changzhou Fulltime	EE85/38/20	Planar transformer core

7. Selection Guidelines

Determine operational frequency (Mn-Zn for <5MHz, Ni-Zn for >5MHz)
Calculate required AL value for inductance
Verify Bs against peak current requirements
Select dimensional compatibility with PCB/winding equipment
Assess temperature stability requirements

8. Industry Trends

Key development directions include:

Miniaturization for high-frequency (>1MHz) operation
New materials with permeability >3000 and Bs >550mT
Integrated magnetics combining multiple functions
Environmental compliance (RoHS, halogen-free coatings)
AI-driven core optimization for EV powertrains

Market forecasts predict 6.8% CAGR through 2027, driven by 5G infrastructure and renewable energy systems.