Ferrite Cores

Part Number	Description / PDF	Quantity
B65883A0000R092 TDK EPCOS	FERRITE CORE PQ 3.2UH N92 2PCS	132
B67345B0010X087 TDK EPCOS	FERRITE CORE U N87 1PC	0
TX25/15/13-3C90 FERROXCUBE	FERRITE CORES ROUND	426
B66483K0000X197 TDK EPCOS	I 20/2.3/14 N97 UNGAPPED	0
B64290L0659X027 TDK EPCOS	FERRITE CORE TOROID 3.27UH N27	141
B64290L0616X087 TDK EPCOS	FERRITE CORE TOROID 4.68UH N87	1117
B64290L0045X065 TDK EPCOS	FERRITE CORE TOROID 3.35UH T65	0
PC95EI14/5/5-Z TDK Corporation	FERRITE CORE EI 1.55UH 1SET	101
B66281G0000X187 TDK EPCOS	FERRITE CORE ELP N87 1PC	7549
B66358G0100X187 TDK EPCOS	FERRITE CORE ETD N87 1PC	208
9498207002 Fair-Rite Products Corp.	98 PLANAR E CORE SET	30
B64290L0045X087 TDK EPCOS	FERRITE CORE TOROID 1.42UH N87	6060
7878400121 Fair-Rite Products Corp.	78 PLANAR EI CORE SET	8205
PC95ER14.5/6-Z TDK Corporation	FERRITE CORE ER 1.88UH 2PC SET	0
5695261721 Fair-Rite Products Corp.	95 POT CORE SET	223
B65807C0315A048 TDK EPCOS	FERRITE CORE RM 315NH N48 2PCS	0
PC47EI60-Z TDK Corporation	EI CORE SMPS TRANSFORMER 1 SET	0
B64290L0038X830 TDK EPCOS	FERRITE CORE TOROID 1.76UH N30	15439
4052235211 Fair-Rite Products Corp.	52 ROD	741
B65815E0160A087 TDK EPCOS	FERRITE CORE	486

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.