Ferrite Cores

Part Number	Description / PDF	Quantity
B66363G2000X187 TDK EPCOS	FERRITE CORE	0
B66305G0000X130 TDK EPCOS	FERRITE CORE E N30 1PC	6037
B64290L0652X038 TDK EPCOS	FERRITE CORE TOROID 6.28UH T38	0
B64290L0082X037 TDK EPCOS	FERRITE CORE TOROID 12UH T37	0
B65803N0160A048 TDK EPCOS	FERRITE CORE RM 160NH N48 2PCS	2483
B67345B0010X027 TDK EPCOS	FERRITE CORE U N27 1PC	0
B64290L0043X037 TDK EPCOS	FERRITE CORE TOROID 13UH T37	118
B65686A0000R027 TDK EPCOS	FERRITE CORE PM 10UH N27 2PCS	34
B65839A0100A057 TDK EPCOS	FERRITE CORE EP 100NH T57 2PCS	0
B66484G0000X149 TDK EPCOS	FERRITE CORE ER N49 1PC	877
B64290P0037X049 TDK EPCOS	FERRITE CORE	2954
B66281G0000X197 TDK EPCOS	FERRITE CORE ELP N97 1PC	0
B65815E0250A087 TDK EPCOS	FERRITE CORE RM N87 2PCS	157
B65813J0000R041 TDK EPCOS	FERRITE CORE RM 5.5UH N41 2PCS	83
B66459G0000X197 TDK EPCOS	FERRITE CORE ELP N97 1PC	273
B66371G0000X187 TDK EPCOS	FERRITE CORE E N87 1PC	152
B66363G1500X187 TDK EPCOS	FERRITE CORE	0
B66453G0000X187 TDK EPCOS	FERRITE CORE ELP N87 1PC	1239
B65813D0400A048 TDK EPCOS	FERRITE CORE RM 400NH N48 2PCS	0
B66371G1500X127 TDK EPCOS	FERRITE CORE E N27 1PC	99

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.