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The EI30 (5+5) high frequency transformer is engineered for compact power conversion systems requiring stable performance under high switching frequencies. Designed with a ferrite EI core, it delivers efficient energy transfer, electrical isolation, and adaptability across a wide range of power topologies. It is widely used in switching power supplies, DC-DC converters, and embedded power modules.
High-frequency operation capability: Typically operates in tens to hundreds of kHz, enabling reduced transformer size and improved power density
Low core and copper losses: Carefully selected ferrite materials minimize energy dissipation
Excellent thermal behavior: Maintains stable output under continuous load conditions
Strong EMI suppression: Structural design helps reduce electromagnetic interference
Precision winding techniques ensure consistent electrical performance
Insulation systems comply with international safety standards (UL, CE, RoHS)
100% testing including hipot, inductance, and turns ratio verification
High mechanical strength for long-term durability
This transformer is suitable for a wide variety of power electronics systems, including:
Switching Mode Power Supplies (SMPS)
Flyback and forward converters
Industrial automation equipment
LED drivers and adapters
Telecom and networking devices
Consumer electronics power modules
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 |