Ferrite Cores

Part Number	Description / PDF	Quantity
B66302G0000X149 TDK EPCOS	FERRITE CORE	0
B66432G0000X187 TDK EPCOS	FERRITE CORE EV N87 1PC	0
B66287G0000X149 TDK EPCOS	FERRITE CORE ELP N49 1PC	39
B64290L0618X027 TDK EPCOS	FERRITE CORE TOROID	870
B65845J0000R030 TDK EPCOS	FERRITE CORE EP 4.3UH N30 2PCS	0
B66379F0000X146 TDK EPCOS	FERRITE CORE E T46 1PC	1701
B64290P0036X065 TDK EPCOS	FERRITE CORE TOROID 750NH T65	0
B66483P0000X192 TDK EPCOS	FERRITE CORE I N92 1PC	581
B64290L0044X037 TDK EPCOS	FERRITE CORE TOROID 3.32UH T37	0
B66295G0000X149 TDK EPCOS	FERRITE CORE ELP N49 1PC	178
B64290P0037X830 TDK EPCOS	FERRITE CORE TOROID 1.09UH N30	4225
B64290L0638X830 TDK EPCOS	FERRITE CORE TOROID 2.61UH N30	1069
B66314G0000X127 TDK EPCOS	FERRITE CORE E N27 1PC	0
B65803J0000R049 TDK EPCOS	FERRITE CORE RM 750NH N49 2PCS	0
B65805P0000R092 TDK EPCOS	FERRITE CORE RM 1.9UH N92 2PCS	0
B66350G0000X187 TDK EPCOS	FERRITE CORE ER N87 1PC	0
B65843P0250J038 TDK EPCOS	FERRITE CORE EPO 250NH T38 2PCS	0
B66457G0000X149 TDK EPCOS	FERRITE CORE ELP N49	260
B64290L0048X065 TDK EPCOS	FERRITE CORE TOROID 6.4UH T65	670
B66319G0500X187 TDK EPCOS	FERRITE CORE	0

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.