SQ/UC Flat Wire Common Mode Inductor - Power Adapter EMI Solution
Dongguan Chaorong Electronics · Professional Insulation Materials
SQ/UC Flat Wire Common Mode Inductors are one of the core products of Dongguan Chaorong Electronic Products Co., Ltd. Using proprietary flat enameled copper wire instead of traditional round wire, they offer significantly lower DCR, higher current capacity, and superior high-frequency performance.
Flat Wire vs Round Wire: Key Advantages
| Parameter | Flat Wire SQ/UC | Traditional Round Wire |
|---|---|---|
| Filling Factor | ≥95% | 60-70% |
| DCR | 20-40% lower | Baseline |
| HF Performance | 100kHz-3MHz | 100kHz-1MHz |
| Thermal Dissipation | Superior | Average |
Key Specifications
- Common Mode Impedance: 100Ω to 10kΩ @ 100MHz
- DCR: 0.5mΩ to 50mΩ
- Rated Current: 1A to 30A
- Operating Temp: -40°C to +125°C
- Flame Rating: UL94 V-0
Applications
USB PD Fast Chargers
65W/100W/140W USB PD chargers require effective EMI suppression. Our flat wire CM inductors help designs pass EN 55032 and FCC Part 15 EMI tests while enabling 30% size reduction.
EV On-Board Chargers
AEC-Q200 compliant, designed for OBC and DC-DC converter applications with wide operating temperature range and vibration resistance. Compatible with SiC/GaN power devices.
Selection Guide
Step 1: Determine application frequency. FeSiAl core for 100kHz-500kHz (LLC resonant converters); Nanocrystalline core for 500kHz-3MHz (PFC circuits). Step 2: Select saturation current (Isat) at least 1.3x peak current. Step 3: Confirm target impedance based on EMC test requirements.
Chaorong Electronics offers SQ/UC Flat Wire Common Mode Inductors with samples shipped within 3-5 working days. Full datasheets and impedance curves available on request.