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The EER28 High Frequency Transformer is a compact and efficient ferrite core transformer designed for high-frequency switching applications. Featuring a 6+6 pin configuration, it is widely used in SMPS, EV charging systems, DC-DC converters, and industrial power supplies.
With optimized magnetic design and material selection, it delivers low core loss, reduced EMI, and excellent thermal stability, ensuring reliable energy transfer under high-frequency operation.
This EER28 high frequency transformer is widely used in:
EV charging systems (on-board chargers, fast chargers)
Battery Management Systems (BMS)
DC-DC converters
Switching power supplies (SMPS)
Industrial automation equipment
Telecommunication power systems
Consumer electronics power modules
Each transformer undergoes strict quality control and testing, including:
Hi-pot testing
Inductance and turns ratio verification
Thermal and load testing
Aging and reliability testing
This ensures stable performance and compliance with international standards.
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 |