Ferrite Cores

Part Number	Description / PDF	Quantity
B64290P0687X046 TDK EPCOS	FERRITE CORE TOROID 5.85UH T49	10828
B66481G0000X608 TDK EPCOS	EQ25/6-PC200	572
B65983E0016T001 TDK EPCOS	CF-PQ65/60-V-1S-16P	16
B66307G0240X187 TDK EPCOS	FERRITE CORE	5868
B66361G0100X187 TDK EPCOS	FERRITE CORE ETD N87 1PC	0
B64290A0632X035 TDK EPCOS	FERRITE CORE TOROID 5UH T35	0
B66506G0000X192 TDK EPCOS	FERRITE CORE EQ N92 1PC	211
B66432G0000X195 TDK EPCOS	FERRITE CORES	0
B65541D0400A048 TDK EPCOS	FERRITE CORE P 400NH N48 2PCS	0
B65805N0160A048 TDK EPCOS	FERRITE CORE RM 160NH N48 2PCS	1018
B66319G0500X127 TDK EPCOS	FERRITE CORE	0
B65935A0000X022 TDK EPCOS	FERRITE CORE P N22 1PC	1784
B66283G0000X197 TDK EPCOS	FERRITE CORE ELP N97 1PC	930
B66329G0500X187 TDK EPCOS	FERRITE CORE	622
B65855A0063D038 TDK EPCOS	FERRITE CORE EP 63NH T38 2PCS	0
B66317G0250X127 TDK EPCOS	FERRITE CORE E N27 1PC	426
B65857A0400E038 TDK EPCOS	FERRITE CORE EPX 400NH T38 2PCS	0
B66457G0000X197 TDK EPCOS	FERRITE CORE ELP N97 1PC	97
B66367G0500X187 TDK EPCOS	FERRITE CORE ETD N87 1PC	264
B66461K0000X192 TDK EPCOS	FERRITE CORE I N92	646

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.