Ferrite Cores

Part Number	Description / PDF	Quantity
B65841A0000R030 TDK EPCOS	FERRITE CORE EP 2UH N30 2PCS	7922
B64290L0082X027 TDK EPCOS	FERRITE CORE	0
B66365G0000X187 TDK EPCOS	FERRITE CORE ETD N87 1PC	1991
B65511A0063A033 TDK EPCOS	FERRITE CORE P 63NH M33 2PCS	5253
B65839A0000R030 TDK EPCOS	FERRITE CORE EP 2UH N30 2PCS	3907
B65517D0200A048 TDK EPCOS	FERRITE CORE P 200NH N48 2PCS	0
B66319G0100X127 TDK EPCOS	FERRITE CORE E N27 1PC	2624
B64290L0699X038 TDK EPCOS	FERRITE CORE	0
B66317G0160X187 TDK EPCOS	FERRITE CORE E N87 1PC	879
B65877A0000R095 TDK EPCOS	FERRITE CORE PQ 5.7UH N95 2PCS	429
B66457G0000X187 TDK EPCOS	FERRITE CORE ELP N87 1PC	608
B66484G0000X192 TDK EPCOS	FERRITE CORE ER N92 1PC	404
B65513J0000R608 TDK EPCOS	ER14.5/6-PC200	1100
B66482K0000X192 TDK EPCOS	FERRITE CORE I N92 1PC	486
B62152A0027X030 TDK EPCOS	FERRITE CORE 2 HOLE 2.4UH N30	0
B64290A0699X830 TDK EPCOS	FERRITE CORE TOROID 10.8UH N30	62
B66894G0000X195 TDK EPCOS	FERRITE CORES	0
B65875A0000R049 TDK EPCOS	FERRITE CORE PQ 2UH N49 2PCS	354
B66453K0000X187 TDK EPCOS	FERRITE CORE I N87	7454
B65881A0000R049 TDK EPCOS	FERRITE CORE PQ 3.3UH N49 2PCS	128

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.