Ferrite Cores

Part Number	Description / PDF	Quantity
B65839A0063A038 TDK EPCOS	FERRITE CORE EP 63NH T38 2PCS	0
B65511A0100A048 TDK EPCOS	FERRITE CORE P 100NH N48 2PCS	2501
B66387G0000X127 TDK EPCOS	FERRITE CORE E N27 1PC	40
B65661D0000R030 TDK EPCOS	FERRITE CORE P 8.3UH N30 2PCS	0
B65611T1000A048 TDK EPCOS	FERRITE CORE P 1UH N48 2PCS	0
B65807C0000R048 TDK EPCOS	FERRITE CORE RM 2.2UH N48 2PCS	1419
B66372B1000T001 TDK EPCOS	CF-E70/33/32-1S	30
B65843A0200B057 TDK EPCOS	FERRITE CORE EP 200NH T57 2PCS	0
B65839A0250E087 TDK EPCOS	FERRITE CORE EP 250NH N87 2PCS	0
B67385G0000X187 TDK EPCOS	FERRITE CORE U N87 1PC	40
B66325G0500X127 TDK EPCOS	FERRITE CORE E N27 1PC	0
B66317G0000X187 TDK EPCOS	FERRITE CORE E N87 1PC	18163
B64290L0044X027 TDK EPCOS	FERRITE CORE TOROID 1.02UH N27	2955
B66397G0000X197 TDK EPCOS	FERRITE CORE ETD N97 1PC	269
B66482K0000X197 TDK EPCOS	FERRITE CORE I N97 1PC	1040
B66287G0000X197 TDK EPCOS	FERRITE CORE ELP N97 1PC	995
B65813J0160A087 TDK EPCOS	FERRITE CORE RM N87 2PCS	189
B64290L0044X065 TDK EPCOS	FERRITE CORE TOROID 2.4UH T65	0
B66482G0000X197 TDK EPCOS	FERRITE CORE ER N97 1PC	478
B67345B0001X027 TDK EPCOS	FERRITE CORE U N27 1PC	16

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.