EE19 Ferrite Core
Description
Technical Parameters
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Products Description
EE19 Ferrite Core: High Performance Ferrite Core for High Frequency Transformers
Meta Title
EE19 Ferrite Core | MnZn Ferrite Transformer Core for High Frequency Applications
Meta Description
EE19 Ferrite Core is a high-performance MnZn ferrite magnetic core designed for high-frequency transformers, SMPS, power supplies, and electronic applications. Learn specifications, features, applications, and selection tips.
EE19 Ferrite Core Overview
An EE19 Ferrite Core is a widely used magnetic core component designed for high-frequency transformers, power converters, switching power supplies, and various electromagnetic applications.
With its compact EE-shaped structure, excellent magnetic performance, and flexible design options, the EE19 core provides an efficient solution for manufacturers requiring reliable transformer cores in power electronics.
EE19 ferrite cores are commonly manufactured using MnZn (Manganese-Zinc) ferrite materials, which provide high permeability, low power loss, and excellent magnetic properties at high frequencies.
What Is an EE19 Ferrite Core?
An EE19 Ferrite Core consists of two matching E-shaped ferrite halves assembled together to form a closed magnetic circuit.
The name "EE19" refers to the approximate core size, where the core width is around 19 mm. Different manufacturers may provide variations such as EE19, EE19A, EE19B, and EE19/5 according to mechanical dimensions and electrical requirements.
The EE structure provides:
Easy coil winding
Simple assembly
Good magnetic shielding
Low leakage inductance
Efficient heat dissipation
These advantages make EE19 ferrite cores suitable for compact transformer designs.
Key Features of EE19 Ferrite Core
1. High Magnetic Performance
EE19 cores are usually made from MnZn ferrite materials, offering:
High initial permeability
Low core loss
High saturation flux density
Stable performance at high frequencies
These characteristics make EE19 cores ideal for high-frequency transformer applications.
2. Compact and Space-Saving Design
Compared with larger transformer cores, EE19 ferrite cores provide a compact structure while maintaining good power handling capability.
This makes them suitable for:
Compact power supplies
Consumer electronics
LED drivers
Adapter transformers
3. Excellent High-Frequency Characteristics
Ferrite materials have high electrical resistivity, which helps reduce eddy current losses during high-frequency operation.
EE19 cores are commonly used in frequency ranges from tens of kHz to hundreds of kHz depending on the material grade and application requirements.
4. Flexible Gap Options
EE19 ferrite cores can be supplied with:
Ungapped cores
Center-leg gapped cores
Customized AL values
Gapped cores are commonly used for inductors and flyback transformers where energy storage capability is required.
EE19 Ferrite Core Specifications
Typical EE19 core parameters include:
| Parameter | Typical Value |
|---|---|
| Core Type | EE19 |
| Material | MnZn Ferrite |
| Effective Length (Le) | Around 40 mm |
| Effective Area (Ae) | Around 23 mm² |
| Effective Volume (Ve) | Around 950 mm³ |
| Weight | Around 4.5 g/set |
Actual dimensions and magnetic parameters vary depending on material grade and manufacturer specifications.
EE19 Ferrite Core Dimensions
Typical EE19 dimensions:
| Dimension | Value |
|---|---|
| Overall Width | Approx. 19 mm |
| Height | Approx. 19 mm |
| Thickness | 5 mm range |
| Center Leg Structure | EE type |
Different EE19 versions may include:
EE19/5
EE19/6.5
EE19/10
EE19A
EE19B
These variations allow designers to optimize transformer size, inductance, and power requirements.
Applications of EE19 Ferrite Core
1. Switching Mode Power Supplies (SMPS)
EE19 ferrite cores are widely used in SMPS transformers because they provide:
High-frequency efficiency
Compact transformer size
Low power loss
Common applications include:
AC/DC adapters
Industrial power supplies
Consumer electronics power modules
2. Flyback Transformers
EE19 cores are frequently selected for flyback transformer designs.
Advantages include:
Suitable energy storage capability with air gaps
Stable inductance performance
Easy manufacturing process
Applications:
LED drivers
Battery chargers
Small power converters
3. High Frequency Transformers
EE19 ferrite cores are suitable for high-frequency transformer applications requiring:
Small size
High efficiency
Reliable magnetic performance
Examples:
Communication power supplies
Control power transformers
Auxiliary power modules
4. Power Electronics
EE19 cores can be found in:
Inverters
DC-DC converters
Industrial control equipment
Renewable energy electronics
EE19 Ferrite Core vs Other EE Cores
| Core Type | Size | Typical Applications |
|---|---|---|
| EE16 | Smaller | Low-power transformers |
| EE19 | Medium compact | SMPS, adapters, converters |
| EE25 | Larger | Higher power applications |
| EE30+ | High power transformers |
EE19 is often selected when designers need a balance between:
Size
Cost
Power capability
Manufacturing efficiency
How to Choose the Right EE19 Ferrite Core?
When selecting an EE19 ferrite core, engineers should consider:
1. Operating Frequency
Higher frequencies require ferrite materials with lower core loss.
Common considerations:
Switching frequency
Core loss characteristics
Temperature rise
2. Power Requirements
The required core size depends on:
Output power
Voltage level
Current density
Transformer topology
3. Ferrite Material
Different materials provide different performance:
High permeability materials for transformers
Low-loss materials for high-frequency operation
High saturation materials for inductors
4. Air Gap Requirements
For energy storage applications:
Flyback transformers require controlled gaps
Inductors require specific AL values
Why Choose Our EE19 Ferrite Core?
As a professional ferrite core manufacturer, we provide:
High-Quality Ferrite Materials
Our EE19 cores are manufactured using carefully selected MnZn ferrite materials to ensure:
Stable magnetic performance
Low core loss
Reliable consistency
Customized Solutions
Available options include:
Different ferrite materials
Customized AL values
Gapped cores
Surface finishing
OEM dimensions
Quality Control
Each production batch is tested for:
Dimensions
Magnetic properties
AL value
Appearance quality
Frequently Asked Questions About EE19 Ferrite Core
What is an EE19 ferrite core used for?
EE19 ferrite cores are mainly used for high-frequency transformers, SMPS transformers, flyback transformers, and power electronic applications.
What material is EE19 ferrite core made from?
Most EE19 ferrite cores use MnZn ferrite materials because of their high permeability and low power loss characteristics.
Can EE19 ferrite cores be customized?
Yes. Manufacturers can customize material grade, air gap, AL value, and mechanical dimensions according to transformer design requirements.
What is the difference between EE19 and EE25 ferrite cores?
EE19 is smaller and suitable for compact power applications, while EE25 provides higher power handling capability for larger transformers.
Conclusion
The EE19 Ferrite Core is a compact and reliable magnetic component widely used in modern power electronics, including switching power supplies, flyback transformers, and high-frequency transformer applications.
With excellent magnetic performance, flexible design options, and cost-effective manufacturing advantages, EE19 ferrite cores remain one of the most popular choices for engineers designing efficient electronic power systems.
If you are looking for a reliable EE19 Ferrite Core manufacturer or customized ferrite core solution, contact our technical team for specifications, samples, and quotation support.
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Customer FAQs
1. What are the typical applications of an EE19 ferrite core?
EE19 is a compact power ferrite core widely used in small to medium switching power supplies, mainly in flyback transformers for phone chargers, power adapters, PoE injectors/splitters, LED drivers, and auxiliary power supplies in home appliances. It is chosen for its low cost, good power density, and stable performance in the low-to-medium frequency range.
2. Which ferrite material grades are available?
We supply standard Mn-Zn power ferrite grades such as PC40, PC44, and PC47 (or equivalent), covering most 50–300 kHz SMPS designs. Each grade differs in saturation flux density, core loss, and thermal characteristics - e.g., PC40 is a general-purpose grade, while PC44/PC47 offer lower core loss at higher frequencies. Tell us your switching frequency and operating temperature, and we will recommend the right grade and send the corresponding datasheet.
3. Are your EE19 cores compatible with standard EE19 bobbins?
Yes. Our EE19 cores follow the industry-standard dimensions and fit regular EE19 coil formers (horizontal/vertical, with or without pins). We also supply matching EE19 bobbins if you need a complete core + bobbin kit. A full dimensional drawing is available on request for your design review.
4. How do you control quality?
Every batch is produced under ISO 9001:2015 quality management. Raw ferrite powder is tested upon incoming inspection, and finished cores undergo 100% visual inspection plus sampling tests for dimensions, AL value, and surface quality. Products are RoHS and REACH compliant, and we can provide test reports and certificates with your order.
5. What is the MOQ and do you support samples?
Sample orders are welcome - small MOQs apply for standard grades (e.g., 1,000–2,000 pcs, subject to specification) and stock items can ship quickly. Custom specifications require a larger MOQ, which we will confirm together with tooling/development time before you commit.
6. What is your lead time and how are the cores packed?
For standard EE19 cores, production lead time is typically 7–15 days after confirmation; custom grades or gapped versions may take longer. Cores are packed in anti-static trays/bags with foam protection inside export cartons to prevent edge chipping and cracking during transit, since ferrite is a brittle ceramic material.
7. Do you only sell bare cores, or can you support complete transformer manufacturing?
Both. You can buy bare EE19 cores directly, or source them together with matching bobbins. If you need full service, our partner facility can build complete EE19 transformers (winding, termination, testing) to your schematic - just share your electrical specification and we will handle the rest.
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