Ferrite Cores

Part Number	Description / PDF	Quantity
H5AP9/5Z-52H TDK Corporation	2PCS POT CORE FOR SIGNAL TRANSFO	1010
H5AP30/19Z-52H TDK Corporation	2PCS POT CORE FOR SIGNAL TRANSFO	75
HF90T44.5X13X30 TDK Corporation	TOROIDAL CORE FOR COMMON MODE CH	6384
HF60T31X13X19 TDK Corporation	TOROIDAL CORE FOR EMI/RFI FILTER	172
PC47EI22-Z TDK Corporation	EI CORE SMPS TRANSFORMER 1 SET	453
PC47EI35-Z TDK Corporation	EI CORE SMPS TRANSFORMER 1 SET	182
HF60T104X20X80 TDK Corporation	TOROIDAL CORE FOR EMI/RFI FILTER	21
PC47EI12.5-Z TDK Corporation	EI CORE SMPS TRANSFORMER 1 SET	550
HF90T80X20X50 TDK Corporation	TOROIDAL CORE FOR COMMON MODE CH	23
HF60T14X7X8 TDK Corporation	TOROIDAL CORE FOR EMI/RFI FILTER	607
H5AP26/16Z-52H TDK Corporation	2PCS POT CORE FOR SIGNAL TRANSFO	45
HF60T25X13X15 TDK Corporation	TOROIDAL CORE FOR EMI/RFI FILTER	197
PC47EI25-Z TDK Corporation	EI CORE SMPS TRANSFORMER 1 SET	206

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.