Ferrite Cores

Part Number	Description / PDF	Quantity
B65805J0000Y038 TDK EPCOS	FERRITE CORE RM 6.7UH T38 2PCS	3180
B65807N0100A033 TDK EPCOS	FERRITE CORE RM 100NH M33 2PCS	985
PC95ELT20X7.7-Z TDK Corporation	FERRITE CORE ELT 5.63UH 1SET	301
B64290L0719X065 TDK EPCOS	FERRITE CORE TOROID 3.93UH T65	0
B66506P0000X188 TDK EPCOS	FERRITE CORE I30/2.7/20 N88 UNGA	0
B65811J0000R097 TDK EPCOS	FERRITE CORE RM 3.3UH N97 2PCS	911
B66365G1000X127 TDK EPCOS	FERRITE CORE ETD N27 1PC	0
B65839A0063A038 TDK EPCOS	FERRITE CORE EP 63NH T38 2PCS	0
TX13/7.9/6.4-3E12 FERROXCUBE	FERRITE CORES ROUND	1045
B65511A0100A048 TDK EPCOS	FERRITE CORE P 100NH N48 2PCS	2501
PQ32/15-3F36 FERROXCUBE	FERRITE CORE 2PC SET	55
B66387G0000X127 TDK EPCOS	FERRITE CORE E N27 1PC	40
PLT13/9/1-3C95 FERROXCUBE	FERRITE CORE	3391
PLT43/28/4.1-3F4 FERROXCUBE	FERRITE CORE	113
B65661D0000R030 TDK EPCOS	FERRITE CORE P 8.3UH N30 2PCS	0
P66/56-3C91 FERROXCUBE	FERRITE CORE 2PC SET	100
B65611T1000A048 TDK EPCOS	FERRITE CORE P 1UH N48 2PCS	0
PC95ER22/5.5/15-Z TDK Corporation	FERRITE CORE ER 4.3UH 2PC SET	190
T60006L2102V080 VACUUMSCHMELZE GmbH & Co. KG.	NANOCRYSTALLINE CORE, 102X76X25,	8
B65807C0000R048 TDK EPCOS	FERRITE CORE RM 2.2UH N48 2PCS	1419

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.