Ferrite Cores

Part Number	Description / PDF	Quantity
B62152A0008X030 TDK EPCOS	FERRITE CORE 2 HOLE 3.1UH N30	19749
B66483G0000X192 TDK EPCOS	FERRITE CORE EQ N92 1PC	587
B66361G0500X187 TDK EPCOS	FERRITE CORE ETD N87 1PC	600
B65841A0063A038 TDK EPCOS	FERRITE CORE EP 63NH T38 2PCS	0
B67345B0003X095 TDK EPCOS	U93/76/16 N95 4100 +30% -20%	0
B67345B0002X087 TDK EPCOS	FERRITE CORE I N87 1PC	200
B65887E0000R041 TDK EPCOS	FERRITE CORE RM 6.8UH N41 2PCS	200
B66397G2000X187 TDK EPCOS	FERRITE CORE ETD N87 1PC	461
B66317G0100X187 TDK EPCOS	FERRITE CORE E N87 1PC	1953
B65811D0400A048 TDK EPCOS	FERRITE CORE RM 400NH N48 2PCS	448
B66413G0000X149 TDK EPCOS	FERRITE CORE EFD N49 1PC	3900
B65811J0400A087 TDK EPCOS	FERRITE CORE RM 400NH N87 2PCS	377
B66319G0000X127 TDK EPCOS	FERRITE CORE E N27 1PC	412
B64290L0652X087 TDK EPCOS	FERRITE CORE TOROID 1.39UH N87	0
B65686A0000R087 TDK EPCOS	FERRITE CORE PM 10UH N87 2PCS	204
B65805J0160A087 TDK EPCOS	FERRITE CORE RM 160NH N87 2PCS	1450
B65839A0160J087 TDK EPCOS	FERRITE CORE EP 160NH N87 2PCS	0
B65815E0250A041 TDK EPCOS	FERRITE CORE RM 250NH N41 2PCS	146
B65845J0000Y038 TDK EPCOS	FERRITE CORE EP 10.8UH T38 2PCS	0
B65879B0000R097 TDK EPCOS	FERRITE CORE PQ 5UH N97 2PCS	451

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.