Ferrite Cores

Part Number	Description / PDF	Quantity
B64290L0044X087 TDK EPCOS	FERRITE CORE TOROID 1.12UH N87	1170
B66387Q0100K187 TDK EPCOS	E65/32/27-N87-DG100	40
B66310G0000X197 TDK EPCOS	FERRITE CORES	0
B64290A0711X010 TDK EPCOS	R202/153/25	0
B66383G0000X127 TDK EPCOS	FERRITE CORE E N27 1PC	0
B64290L0044X038 TDK EPCOS	FERRITE CORE TOROID 5.11UH T38	14251
B65885A0000R087 TDK EPCOS	FERRITE CORE PQ 2.35UH N87 2PCS	1157
4077296011 Fair-Rite Products Corp.	77 SOLID ROD	3491
B66482G0000X192 TDK EPCOS	FERRITE CORE ER N92 1PC	479
B65803P0000R092 TDK EPCOS	FERRITE CORE RM 1UH N92 2PCS	0
B66305G0300X187 TDK EPCOS	FERRITE CORE	0
P11/7/I-3F46 FERROXCUBE	FERRITE CORE 2PC SET	641
E100/60/28-3C94 FERROXCUBE	FERRITE CORE	40
B66484K0000X187 TDK EPCOS	FERRITE CORE I N87 1PC	431
B65947A0000X022 TDK EPCOS	FERRITE CORE PS N22	300
EP20-3C96 FERROXCUBE	FERRITE CORE 2PC SET	873
PQ35/20-3C97 FERROXCUBE	FERRITE CORE 2PC SET	91
B64290L0082X065 TDK EPCOS	FERRITE CORE TOROID 10UH T65	215
PLT58/38/4-4F1 FERROXCUBE	CORES	320
B65981A0000R097 TDK EPCOS	FERRITE CORE PQ 6.7UH N97 2PCS	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.