The PQ-type resonant inductor is a wound power inductor with a PQ ferrite core, designed for resonant circuits (e.g., LLC resonant converters). Leveraging the core's high permeability and low loss, it works with capacitors to set the resonant frequency, making it a key component for efficient, compact power supply designs.
High-Efficiency PQ-type resonant inductor for Advanced Power Systems
With low loss, high current, high power density, and high reliability, the PQ-type resonant inductor is ideal for efficient, compact resonant power designs. It excels in demanding applications like new energy vehicles and PV energy storage.
Key Features
Low Loss & High Efficiency: The PQ-type core and optimized winding design effectively reduce core loss and copper loss at high frequencies, improving overall power supply efficiency. Its DC resistance (DCR) can be as low as 1.9mΩ, helping to minimize heat generation.
High Current Carrying Capacity: The structural design provides excellent saturation current characteristics, allowing it to withstand very high operating currents without significant inductance roll-off. For example, some models offer a saturation current (Isat) of up to 92.5A.
Compact Size & High Power Density: The PQ-type core structure helps achieve the required inductance and power handling capability within a small package volume, aligning with the trend toward power supply miniaturization. Common SMD package sizes are 27.9mm x 19.8mm.
High Reliability: Products typically meet the AEC-Q200 automotive-grade certification standard and can operate over a wide temperature range of -40°C to +155°C, making them suitable for applications with stringent reliability requirements.
DC-Dias| Electric Current (A) | Inductance uH |
| 0 | 51.4 |
| 5 | 51.2 |
| 10 | 51.1 |
| 15 | 50.8 |
| 20 | 49.8 |
| 25 | 47.3 |
| 30 | 46.3 |
| 35 | 45.9 |
| 40 | 45.4 |
| 45 | 44.9 |
| 50 | 43.9 |
Winding Specification
| Winding | Terminal | Wire Specification | Turns | Remarks |
| N1 | 1-2 | 2UEW-F φ0.1*110 | 30TS | Reference turns |
Material
| Item Name | Specification |
| Enamelled Wire | 2UEW-F φ0.1*110 |
| Magnetic Core | PQ4040/PC40 |
| Base | PQ4040/T375HF/ Black |
| Epoxy glue | E500 |
| Solder / Solder Tin | Sn99.3Cu0.7 |
Electrical Parameters
| Inductance #1 | 50uH ±15%(30KHz/1V ) |
| Inductance #2 |
40uH Min (30KHz/1V/30A ) |
| DC Resistance (DCR) | 20 mΩ Max |
| Insulation Dielectric Voltage (Hi-pot) | 1.8KVac 2mA-3S |
| Insulation Resistance (IR) | 100MΩ Min(DC500V) |
Target Applications
Industrial & Server Power Supplies: Resonant inductors are key to miniaturization and high efficiency in space-constrained, high-power-density supplies, such as 500W–6KW PFC circuits.
New Energy & Energy Storage: Used in PV inverters and storage system charging, they help maintain high efficiency across a wide voltage range. Related technologies are also a key industry research focus.
On-Board Charger (OBC): Widely used in EV LLC resonant converters for high-efficiency AC-DC conversion. A current R&D and application hotspot.
DC Fast Charging Piles: In DC-DC modules of fast chargers, the resonant inductor partners with the main transformer for key power conversion, e.g., in 60KW and 120KW charging pile solutions.
Proven Industry Expertise: With over 20 years of industrial experience and a solid foundation established in 2013, we operate five major core industrial lines across multiple specialized manufacturing bases to ensure top-tier product scale and stability.
Global Quality Certifications: Our facilities strictly adhere to international automotive and industrial standards, backed by a complete set of major credentials including IATF16949, ISO9001, ISO14001, ISO45001, and ISO50001.
Strong R&D & Technical Innovation: Driven by dedicated research teams and specialized new-design laboratories, we possess extensive patent portfolios and advanced testing capabilities to provide highly reliable, customized magnetic solutions.
Smart & Scalable Manufacturing: We leverage advanced ERP and MES-managed smart manufacturing systems to optimize production capacity, securing a highly dependable supply chain for international clients across the EU, US, and globally.
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