Ferrite Cores

Part Number	Description / PDF	Quantity
PC47EPC17-Z TDK Corporation	FERRITE CORE EPC 1.15UH 2PC SET	138
PC95ER25/5.5/18-Z TDK Corporation	FERRITE CORE ER 4.4UH 2PC SET	1196
PC95ELT11X4-Z TDK Corporation	FERRITE CORE ELT 2.4UH 1SET	124
HF90T104X20X80 TDK Corporation	TOROIDAL CORE FOR COMMON MODE CH	0
PC95PQ35/35Z-12 TDK Corporation	FERRITE CORE PQ 7.32UH 2PC SET	127
PC95EL22X8-Z TDK Corporation	FERRITE CORE EL 6.54UH 2PC SET	261
PC95SP135X65X20 TDK Corporation	FERRITE CORE SP 1PCS	29
PC95PQ32/30Z-12 TDK Corporation	FERRITE CORE PQ 7UH 2PC SET	74
H5AT28X13X16 TDK Corporation	FERRITE CORE FOR TELECOMMUNICATI	0
PC95SP70X20X20 TDK Corporation	FERRITE CORE SP 1PCS	7
PC44PQ40/40Z-12 TDK Corporation	FERRITE CORE 2PC SET	0
PC47EPC13-Z TDK Corporation	FERRITE CORE EPC 870NH 2PC SET	129
PC95ELT20X7.7-Z TDK Corporation	FERRITE CORE ELT 5.63UH 1SET	301
PC95ER22/5.5/15-Z TDK Corporation	FERRITE CORE ER 4.3UH 2PC SET	190
PC95PQI26/12Z-12 TDK Corporation	FERRITE CORE PQI 11.95UH 1SET	0
PC44EPC13-Z TDK Corporation	FERRITE CORE 2PC SET	1850
PC95ELT13X4.4-Z TDK Corporation	FERRITE CORE ELT 3.16UH 1SET	0
PC95EI14/5/5-Z TDK Corporation	FERRITE CORE EI 1.55UH 1SET	101
PC95ER14.5/6-Z TDK Corporation	FERRITE CORE ER 1.88UH 2PC SET	0
PC47EI60-Z TDK Corporation	EI CORE SMPS TRANSFORMER 1 SET	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.