Ferrite Cores

Part Number	Description / PDF	Quantity
PC95PQI26/12Z-12 TDK Corporation	FERRITE CORE PQI 11.95UH 1SET	0
4078377511 Fair-Rite Products Corp.	78 ROD	2330
B66482G0000X197 TDK EPCOS	FERRITE CORE ER N97 1PC	478
3061990871 Fair-Rite Products Corp.	61 ROD	12222
TX29/19/15-3E27 FERROXCUBE	FERRITE CORES ROUND	0
B67345B0001X027 TDK EPCOS	FERRITE CORE U N27 1PC	16
B65807J0000R041 TDK EPCOS	FERRITE CORE RM 3.1UH N41 2PCS	980
U100/57/25-3C90 FERROXCUBE	CORES	329
PLT64/50/5-3F36 FERROXCUBE	FERRITE CORE	254
B64290L0674X037 TDK EPCOS	FERRITE CORE TOROID 8.5UH T37	696
B66377G0000X127 TDK EPCOS	FERRITE CORE ER N27 1PC	0
PQ50/35-3C95 FERROXCUBE	FERRITE CORE 2PC SET	45
B66383G0000X187 TDK EPCOS	FERRITE CORE E N87 1PC	0
TX14/9/5-3E27 FERROXCUBE	FERRITE CORES ROUND	1124
TX25/15/13-3E65 FERROXCUBE	FERRITE CORES ROUND	423
TX22/14/13-3E12 FERROXCUBE	FERRITE CORES ROUND	455
B64290L0644X065 TDK EPCOS	FERRITE CORE TOROID 2.3UH T65	0
TX13/7.9/6.4-3E27 FERROXCUBE	CORES	12315
B64290P0683X010 TDK EPCOS	FERRITE CORE TOROID 160NH K10	0
B64290L0082X830 TDK EPCOS	FERRITE CORE TOROID 8.7UH N30	913

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.