Ferrite Cores

Part Number	Description / PDF	Quantity
B65843P0000R045 TDK EPCOS	FERRITE CORE	0
I93/28/30-3C94 FERROXCUBE	FERRITE CORE	37
TX29/19/15-3E6 FERROXCUBE	FERRITE CORES ROUND	223
E19/8/5-3C94 FERROXCUBE	FERRITE CORE	2374
B67370A0002X187 TDK EPCOS	FERRITE CORE U N87 1PC	7
B64290L0062X035 TDK EPCOS	FERRITE CORE TOROID 2.65UH T35	0
PQ35/30-3F36 FERROXCUBE	FERRITE CORE 2PC SET	50
PQ40/40-3C95 FERROXCUBE	FERRITE CORE 2PC SET	64
E55/28/25-3C94 FERROXCUBE	FERRITE CORE	260
B65879Q0100K095 TDK EPCOS	PQ32/30-N95-DG100	0
PQ26/25-3C97 FERROXCUBE	FERRITE CORE 2PC SET	642
B65855A0000R092 TDK EPCOS	FERRITE CORE	0
B64290A0044X087 TDK EPCOS	FERRITE CORE TOROID 11.2UH N87	0
B65811J0160A087 TDK EPCOS	FERRITE CORE RM N87 2PCS	860
EP17-3C96 FERROXCUBE	FERRITE CORE 2PC SET	675
B65819J0000R049 TDK EPCOS	FERRITE CORE RM 1.9UH N49 2PCS	0
3061990851 Fair-Rite Products Corp.	61 ROD	14290
TX25/15/13-3C94 FERROXCUBE	FERRITE CORES ROUND	329
B65819P0000R049 TDK EPCOS	FERRITE CORE RM 2.4UH N49 2PCS	0
P26/16-3F3 FERROXCUBE	CORES 2PC SET	1046

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.