Ferrite Cores

Part Number	Description / PDF	Quantity
B66281K0000X149 TDK EPCOS	FERRITE CORE I N49	4630
B65541W0000R030 TDK EPCOS	FERRITE CORE P 4.6UH N30 2PCS	947
B66319G0180X127 TDK EPCOS	FERRITE CORE E N27 1PC	0
B65805J0000R041 TDK EPCOS	FERRITE CORE RM 2.6UH N41 2PCS	1190
B66395G1000X187 TDK EPCOS	FERRITE CORE ETD N87 1PC	28
B64290A0705X830 TDK EPCOS	FERRITE CORE TOROID 6.2UH N30	4
B65611D0630A048 TDK EPCOS	FERRITE CORE P 630NH N48 2PCS	0
B66389G0500X127 TDK EPCOS	FERRITE CORE	0
B65887P0000R092 TDK EPCOS	FERRITE CORE	193
B66461K0000X197 TDK EPCOS	FERRITE CORE I N97	159
B66311G0150X127 TDK EPCOS	FERRITE CORE	0
B65815P0000R087 TDK EPCOS	FERRITE CORE RM 6.3UH N87 2PCS	0
B65701T0630A048 TDK EPCOS	FERRITE CORE P 630NH N48 2PCS	249
B65511A0000Y065 TDK EPCOS	FERRITE CORE P 2PCS	0
B65513J0000R092 TDK EPCOS	FERRITE CORE ER 1.1UH N92 2PCS	0
B64290L0632X065 TDK EPCOS	FERRITE CORE TOROID 5.05UH T65	0
B66319G1000X127 TDK EPCOS	FERRITE CORE	0
B64290A0045X830 TDK EPCOS	FERRITE CORE TOROID 2.77UH N30	0
B62152A0008X001 TDK EPCOS	FERRITE CORE 2 HOLE 60NH K1	0
B65811J1600K041 TDK EPCOS	FERRITE CORE RM 1.6UH N41 2PCS	2242

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.