Ferrite Cores

Part Number	Description / PDF	Quantity
B65807P0000R087 TDK EPCOS	FERRITE CORE RM 3UH N87 2PCS	986
B62152P0015X030 TDK EPCOS	FERRITE CORE 2 HOLE 1.6UH N30	0
B66233G0000X187 TDK EPCOS	FERRITE CORE E N87 1PC	287
B66317G0000X127 TDK EPCOS	FERRITE CORE E N27 1PC	19
B66371G0000X195 TDK EPCOS	FERRITE CORE	0
B66363G0500X127 TDK EPCOS	FERRITE CORE ETD N27 1PC	65
B66287G0000X195 TDK EPCOS	FERRITE CORE ELP N95 1PC	396
B66461G0000X192 TDK EPCOS	FERRITE CORE ELP N92 1PC	282
B65843A0200B045 TDK EPCOS	FERRITE CORE EP 200NH N45 2PCS	0
B65841A0000R045 TDK EPCOS	FERRITE CORE EP 1.6UH N45 2PCS	0
B65845J0000R087 TDK EPCOS	FERRITE CORE EP 2.4UH N87 2PCS	0
B65879A0000R097 TDK EPCOS	FERRITE CORE PQ 6.5UH N97 2PCS	465
B65839A0200C045 TDK EPCOS	FERRITE CORE EP 200NH N45 2PCS	0
B64290L0644X037 TDK EPCOS	FERRITE CORE TOROID 3.06UH T37	0
B65651W0000Y038 TDK EPCOS	FERRITE CORE P 12.6UH T38 2PCS	871
B66453K0000X197 TDK EPCOS	FERRITE CORE I N97	745
B66423G0000X197 TDK EPCOS	FERRITE CORE EFD N97 1PC	0
B65807J0100A033 TDK EPCOS	FERRITE CORE RM 100NH M33 2PCS	0
B65805C0250A048 TDK EPCOS	FERRITE CORE RM 250NH N48 2PCS	355
B65807J0000R097 TDK EPCOS	FERRITE CORE RM 2.4UH N97 2PCS	2748

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.