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The EI28 6+6 pin high-frequency transformer is developed for power systems requiring multiple winding configurations and enhanced circuit flexibility. Compared to standard 5+5 designs, the extended pin layout enables more complex electrical architectures and improved signal separation.
It is particularly suitable for switching power applications where multiple outputs or auxiliary circuits are needed.
The EI28 transformer uses a ferrite EI core structure that ensures efficient magnetic flux transfer:
Central limb design enhances magnetic coupling
Reduced leakage inductance with proper winding arrangement
Stable magnetic performance under dynamic load
The EI core structure provides a continuous magnetic path, improving energy transfer efficiency between windings.
With its larger core size and optimized design, the EI28 transformer supports higher power levels and high-frequency switching:
Suitable for medium-to-high power applications
Operates efficiently in high-frequency switching environments
Supports stable voltage transformation and isolation
Typical EI28 transformers can operate in high-frequency ranges used in SMPS, often up to hundreds of kHz depending on design.
The EI28 6+6 pin transformer is widely used in applications requiring multi-output and complex circuit design:
Switching power supplies (SMPS)
DC-DC and AC-DC converters
Industrial control and automation systems
Power modules and UPS systems
Consumer electronics and communication devices
Its extended pin configuration makes it ideal for advanced power architectures.
Technical Specifications

| Main Category | Subcategory | Details |
| MOQ | Prototyping & Small-batch | 10 piece minimum order |
| Sample Service | Free proofing & custom service, 5 free samples (shipping at buyer’s cost) | |
| Bulk Order | 5,000 pieces and above with bulk pricing | |
| Lead Time | All Standard Components | Shipped within 5–7 working days |
| Custom Inductance / Pin Design (Sample) | Sample order confirmed within 5–7 working days | |
| Custom Inductance / Pin Design (Mass Order) | Shipped within 15–30 working days | |
| Payment Terms | Main Payment Term | T/T in advance, L/C at sight |
| Procurement Standard | Complies with global enterprise procurement standard for passive components | |
| Quality Deposit | No quality security deposit required | |
| Accepted Terms | FOB Shanghai / Nanjing / Hong Kong, T/T Advance | |
| Quality Assurance | Manufacturing Defects | Free replacement for issues caused by manufacturing defects |
| Inspection Report | Batch inspection reports available as certification upon customer request | |
| Packaging Specifications | Updated Packaging (2026) | Blister tray packaging; Sealed Tape & Reel for SMD products |
| Optional Packaging | Vacuum sealed packaging for customers with strict moisture-proof requirements |