Ferrite Cores

Part Number	Description / PDF	Quantity
B65651D0100A033 TDK EPCOS	FERRITE CORE P 100NH M33 2PCS	4329
B65541W0000R087 TDK EPCOS	FERRITE CORE P 2.8UH N87 2PCS	936
B64290L0647X830 TDK EPCOS	FERRITE CORE TOROID 5.63UH N30	595
B65541D0100A033 TDK EPCOS	FERRITE CORE P 100NH M33 2PCS	0
B65857C0000R057 TDK EPCOS	FERRITE CORE EPX 2.4UH T57 2PCS	0
B66434G0000X187 TDK EPCOS	FERRITE CORE EV N87 1PC	0
B65807C0400A048 TDK EPCOS	FERRITE CORE RM 400NH N48 2PCS	650
B65701T1000A048 TDK EPCOS	FERRITE CORE P 1UH N48 2PCS	295
B65807N0400A048 TDK EPCOS	FERRITE CORE RM 400NH N48 2PCS	730
B65813J0000R049 TDK EPCOS	FERRITE CORE RM 2.9UH N49 2PCS	112
B64290L0742X830 TDK EPCOS	FERRITE CORE TOROID 2.6UH N30	0
B66317G0100X127 TDK EPCOS	FERRITE CORE E N27 1PC	342
B65805C0000R048 TDK EPCOS	FERRITE CORE RM 1.8UH N48 2PCS	984
B66295K0000X149 TDK EPCOS	FERRITE CORE I N49	180
B66481G0000X197 TDK EPCOS	FERRITE CORE EQ N97 1PC	644
B66317G0250X187 TDK EPCOS	FERRITE CORE E N87 1PC	3525
B66319G1000X187 TDK EPCOS	FERRITE CORE	0
B66413U0160L197 TDK EPCOS	FERRITE CORE	0
B66329G0000X197 TDK EPCOS	FERRITE CORE E N97 1PC	344
B64290L0044X049 TDK EPCOS	FERRITE CORE TOROID 660NH N49	1631

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.