Ferrite Cores

Part Number	Description / PDF	Quantity
B66302G0000X130 TDK EPCOS	FERRITE CORE E N30 1PC	9656
B66361G0500X127 TDK EPCOS	FERRITE CORE ETD N27 1PC	200
B65646A0000R087 TDK EPCOS	FERRITE CORE PM 7.4UH N87 2PCS	93
B67374G0000X127 TDK EPCOS	FERRITE CORE U N27 1PC	0
B66363G0800X187 TDK EPCOS	FERRITE CORE	0
B66393G0000X197 TDK EPCOS	FERRITE CORE	0
B65671T0630A048 TDK EPCOS	FERRITE CORE P 630NH N48 2PCS	755
B65807N0063A033 TDK EPCOS	FERRITE CORE RM 63NH M33 2PCS	1671
B65525J0000Y038 TDK EPCOS	FERRITE CORE ER 6.4UH T38 2PCS	2034
B66285K0000X192 TDK EPCOS	FERRITE CORE I N92	421
B66311G0000X127 TDK EPCOS	FERRITE CORE E N27 1PC	4006
B66367G2000X187 TDK EPCOS	FERRITE CORE ETD N87 1PC	24
B65531W0000R030 TDK EPCOS	FERRITE CORE P 3.5UH N30 2PCS	0
B66289K0000X149 TDK EPCOS	FERRITE CORE I N49	297
B62152P0027X030 TDK EPCOS	FERRITE CORE 2 HOLE 2.4UH N30	0
B64290L0022X097 TDK EPCOS	FERRITE CORE	509
B65887E0250A041 TDK EPCOS	FERRITE CORE RM 250NH N41 2PCS	156
B65843A0250J038 TDK EPCOS	FERRITE CORE EP 250NH T38 2PCS	0
B64290L0038X087 TDK EPCOS	FERRITE CORE TOROID 900NH N87	5465
B66329G1500X127 TDK EPCOS	FERRITE CORE E N27 1PC	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.