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For Purchasing Managers, Technical Directors & Operations Leaders who are battling high‑cost, low‑quality safety gear, our factory‑direct electrical protective devices deliver up to 40% cost savings while meeting CE, UL, FCC, ISO 9001 standards.
Get Free Quote in 24 h| Model | Voltage Rating | Current Rating | Response Time | Certifications | Standard |
|---|---|---|---|---|---|
| EPD‑A100 | ≤ 480 V | ≤ 100 A | ≤ 5 ms | CE, UL, FCC | IEC 61850 |
| EPD‑B250 | ≤ 660 V | ≤ 250 A | ≤ 3 ms | CE, CB, RoHS | IEC 60204‑1 |
| EPD‑C500 | ≤ 1000 V | ≤ 500 A | ≤ 2 ms | ISO 9001, VDE, GS | IEC 61869‑1 |
Industrial Automation Plants – Replaced generic breakers with our EPD‑B250, cutting unplanned downtime by 27% and saving $120k annually.
Medical Equipment Manufacturers – Customized low‑EMI protective modules (EPD‑A100) met FDA‑21 CFR Part 820 compliance, accelerating product launch by 3 months.
Renewable Energy Facilities – Our high‑current EPD‑C500 protected 5 MW solar inverters, achieving a 99.96% availability rate.
Smps-supply-circuit-design Special-transformers transformer-electrical Online-suppliers-high-frequency-inductors-China
Certificates: CE, UL, FCC, GS, CB, RoHS, VDE, ISO 9001, HACCP/GMP, IPPC
Standard production runs ship within 7‑10 business days. Rush orders can be fulfilled in 48 hours with a small surcharge.
Yes. Our R&D team can design devices from 120 V up to 1000 V and 10 A‑500 A. Minimum order for custom specs is 5 k units.
All devices are CE, UL, FCC, RoHS, ISO 9001, VDE, CB, GS certified. Additional regional approvals (e.g., CSA, JIS) are available on request.

We partner with DHL, FedEx, and UPS for air freight and offer FOB, CIF, or DDP terms. Our logistics team provides real‑time tracking and customs documentation.
A 24‑month warranty, free technical hotline, and on‑site training (optional) are standard. Firmware updates are provided at no extra cost.
Limited‑time offer: **Free engineering sample** for orders placed before May 31 2026. No‑risk trial, money‑back guarantee if specifications are not met.
Or contact us directly: +86 131 2825 6415 | grace01@xinchangdadz.com
“Xinchangda delivered 12 k custom protective relays in 6 days. Our outage rate dropped from 4.2% to 1.1% – a clear ROI within the first quarter.”
“The OEM design met FDA 21 CFR Part 820 without extra validation costs. Sample testing was flawless, and the 30‑day lead time kept our launch on track.”
“Competitive pricing plus CE & VDE certifications eliminated the need for a third‑party test lab. We saved €45 k on our 2025 solar‑farm rollout.”
Dr. Grace Chen – Senior Application Engineer, Huizhou Xinchangda Electronic
With 12 years of experience in magnetic component design and over 200 successful OEM projects worldwide, Dr. Chen leads the R&D team that delivers certified electrical protective devices. She holds a Ph.D. in Power Electronics (Tsinghua University) and regularly contributes to IEC technical committees.
Connect: grace01@xinchangdadz.com | +86 131 2825 6415