Ferrite Cores

Part Number	Description / PDF	Quantity
B65805J0160A048 TDK EPCOS	FERRITE CORE RM 160NH N48 2PCS	0
B64290L0674X830 TDK EPCOS	FERRITE CORE TOROID 5.63UH N30	736
B65531D0000R048 TDK EPCOS	FERRITE CORE P 1.8UH N48 2PCS	0
B65807J0250A041 TDK EPCOS	FERRITE CORE RM 250NH N41 2PCS	970
B66281K0000X192 TDK EPCOS	FERRITE CORE I N92	2301
B66483G0000X197 TDK EPCOS	FERRITE CORE EQ N97 1PC	575
B65531T0160A048 TDK EPCOS	FERRITE CORE P 160NH N48 2PCS	0
B66325G1000X187 TDK EPCOS	FERRITE CORE	0
B64290L0719X087 TDK EPCOS	FERRITE CORE TOROID 1.66UH N87	0
B65807J0000R087 TDK EPCOS	FERRITE CORE RM 2.4UH N87 2PCS	3484
B65813J1600K041 TDK EPCOS	FERRITE CORE RM 1.6UH N41 2PCS	533
B65875B0000R097 TDK EPCOS	FERRITE CORE PQ 3.2UH N97 2PCS	360
B66361G0000X197 TDK EPCOS	FERRITE CORES	0
B65877B0000R049 TDK EPCOS	FERRITE CORE PQ 3.85UH N49 2PCS	367
B65805J0000R049 TDK EPCOS	FERRITE CORE RM 1.3UH N49 2PCS	1925
B64290L0616X830 TDK EPCOS	FERRITE CORE TOROID 9.16UH N30	137
B65819J0160J041 TDK EPCOS	FERRITE CORE RM 160NH N41 2PCS	0
B66335G0000X127 TDK EPCOS	FERRITE CORE E N27 1PC	94
B66319G0100X187 TDK EPCOS	FERRITE CORE E N87 1PC	0
B65661W0000R030 TDK EPCOS	FERRITE CORE P 8.3UH N30 2PCS	267

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.