Ferrite Cores

Part Number	Description / PDF	Quantity
B65651D0000R048 TDK EPCOS	FERRITE CORE P 2.8UH N48 2PCS	2487
B65517D0250J048 TDK EPCOS	FERRITE CORE P 250NH N48 2PCS	8628
B66300G0000X130 TDK EPCOS	FERRITE CORE E N30 1PC	0
B65945A0000X022 TDK EPCOS	FERRITE CORE P N22	161
B65805J0000R608 TDK EPCOS	FERRITE CORE RM PC200 1=2PC	109
B65661D0000R001 TDK EPCOS	FERRITE CORE P 220NH K1 2PCS	0
B65661D0000R041 TDK EPCOS	FERRITE CORE	0
B64290L0038X037 TDK EPCOS	FERRITE CORE TOROID 2.66UH T37	1145
B65511A0000Y048 TDK EPCOS	FERRITE CORE P 1UH N48 2PCS	363
B66506P0000X197 TDK EPCOS	FERRITE CORE I N97 1PC	1954
B66315G0500X127 TDK EPCOS	FERRITE CORE E N27 1PC	0
B66281G0000X608 TDK EPCOS	ELP14/3.5/5-PC200	1318
B64290L0062X830 TDK EPCOS	FERRITE CORES	0
B66358G1000X187 TDK EPCOS	FERRITE CORE ETD N87 1PC	0
B65839A0000R065 TDK EPCOS	FERRITE CORE EP 3UH T65 2PCS	0
B64290P0687X830 TDK EPCOS	FERRITE CORE TOROID 1.68UH N30	0
B65733A0000R027 TDK EPCOS	FERRITE CORE PM 16UH N27 2PCS	6
B65541T0100A033 TDK EPCOS	FERRITE CORE P 100NH M33 2PCS	1330
B66307G0000X130 TDK EPCOS	FERRITE CORE E N30 1PC	3850
B66307G0060X187 TDK EPCOS	FERRITE CORE E N87 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.