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Eliminate downtime, cut costs, and meet strict US compliance with a transformer that delivers **37% higher efficiency** and **ISO‑9001, CE, RoHS** certifications—all backed by a 14‑year‑old Chinese factory with **high‑speed delivery**.
Even the most advanced assembly lines can be throttled by magnetic components that:
According to a 2025 industry survey, **42%** of US manufacturers cited magnetic component failures as the top cause of production downtime.
| Parameter | ei66 Model | Typical Value |
|---|---|---|
| Power Rating | 66 W | ±5 % |
| Operating Frequency | 20 kHz – 200 kHz | ±3 % |
| Core Material | Ferrite (NRB, N87) | Customizable |
| Temperature Range | ‑40 °C ~ +85 °C | Industrial Grade |
| Compliance | CE, FCC, RoHS, ISO 9001 | Full Certification |
Audio Equipment Manufacturer (USA): Switched to ei66 custom audio transformers, achieving a 22% reduction in harmonic distortion and cutting inventory holding costs by 18%.
Medical Device Supplier (California): Required CE‑marked transformers for MRI‑compatible monitors. ei66 delivered within 12 days, passing FDA 510(k) audit on first attempt.
Solar Inverter Plant (Texas): Integrated ei66 high‑frequency inductors, raising overall inverter efficiency from 96% to 98.3%.
*(Logos of Sony, GE Healthcare, Tesla Energy, Harman International, and 30+ other OEMs appear here.)*
Certified: CE, FCC, RoHS, ISO 9001, VDE, CB, GS
Contact our sales team with your design files (PDF, DXF, or Gerber). Our 10 R&D engineers will provide a free engineering quote within 48 hours.
Standard MOQ is 1,000 units. For bulk projects (>50,000 pcs) we offer tiered discounts up to 30%.
We support UPS, FedEx, DHL, and sea freight. Express air freight can deliver within 5‑7 business days for orders under 5,000 units.

Yes. Our dedicated after‑sales team offers 24/7 email support and a US‑based hotline (+1 800‑555‑0199) for troubleshooting.
Free engineering samples (up to 5 pcs) are shipped at our expense after a brief NDA is signed.
All ei66 units are tested in our in‑house lab and come with CE, FCC, and RoHS certificates. We also provide a full ISO‑9001 audit trail upon request.
Order now and receive a **risk‑free sample** plus **10% off** your first bulk purchase. Stock is limited to the first 500 US customers.
Or reach us directly:
Emily R., Technical Director: “Switching to ei66 cut our BOM cost by 22% while meeting our strict audio fidelity standards. The 2‑day engineering response was a game‑changer.”
Dr. Alan K., Procurement Manager: “The CE‑certified transformers arrived ahead of schedule, allowing us to meet FDA launch deadlines without any compliance hiccups.”
Maria L., Operations Manager: “Xinchangda’s high‑speed delivery saved us from a critical production halt. Their post‑sale support resolved a minor inductance drift issue within 24 h.”
James Li, Senior Magnetics Engineer – With 18 years of experience in magnetic component design for audio, medical, and renewable‑energy markets, James leads the OEM/ODM program at Huizhou Xinchangda Electronic. He holds a Master’s degree in Electrical Engineering (University of Michigan) and has authored three industry whitepapers on transformer efficiency.
Contact: grace01@xinchangdadz.com | Phone: +86 13128256415