The combination of a racetrack core and vertical flat-wire winding delivers minimal copper loss and exceptional high-frequency EMI filtering within a minimal space. It is purpose-built for demanding applications including EVs, server power supplies, and industrial automation.
Flat Wire Vertical-Wound Common Mode Choke with Racetrack Core Design
This flat-wire vertical-wound common mode choke features an innovative racetrack core design that significantly optimizes the magnetic path and window utilization. The combination of vertical winding technology and flat copper wire drastically reduces direct current resistance (DCR) and high-frequency skin effect, enabling high current-carrying capacity with minimal heat generation. Its compact, low-profile structure saves critical PCB space while delivering exceptional thermal management and mechanical stability. With ultra-low parasitic capacitance, it provides broad-frequency and highly efficient EMI common mode noise suppression, making it an ideal component for high-power-density power systems.

Key Features
Excellent Core Performance: The nanocrystalline material features high permeability and high saturation magnetic flux density. This means that fewer winding turns are needed to achieve greater inductance and impedance, with significantly superior high-frequency interference suppression compared to traditional ferrite cores.
| f (KHz) | Z(KΩ) |
| 1 | 0.011 |
| 100 | 0.8 |
| 200 | 1.13 |
| 300 | 1.33 |
| 400 | 1.5 |
| 500 | 1.65 |
| 600 | 1.8 |
| 700 | 1.94 |
| 800 | 2.07 |
| 1M | 2.32 |
| 2M | 3.3 |
| 3M | 3.53 |
| 4M | 3.2 |
| 5M | 2.5 |
Winding Specification
| Winding | Terminal | Wire Specification | Turns | Remarks |
| N1 | 1-2 | QZY-2/180 1.2*4 | 15TS | Reference turns |
| N2 | 3-4 | QZY-2/180 1.2*4 | 15TS | Reference turns |
| N3 | 5-6 | QZY-2/180 1.2*4 | 15TS | Reference turns |
| N4 | 7-8 | QZY-2/180 1.2*4 | 15TS | Reference turns |
Material
| Item Name | Specification |
| Enamelled Wire | QZY-2/180 1.2*4 |
| Magnetic Core | 754011-11/1K107 |
| Bobbin / Coil Former | 754011-11/PBT/黑色 |
| epoxy adhesive | E500 |
| Solder / Solder Tin | Sn99.3Cu0.7 |
Electrical Parameters
| Inductance #1 | 1.5mH Min (1KHz/1V) |
| DC Resistance (DCR) | 4 mΩ Max |
| Insulation Dielectric Voltage (Hi-pot) | 1.8KVac 2mA-3S |
| Insulation Resistance (IR) | 100MΩ Min(DC500V) |
Target Applications
New Energy Vehicles: Used in on-board chargers (OBC) to efficiently suppress common-mode interference in high-temperature environments.
Photovoltaic and Wind Power Generation: Used for EMC filtering in high-power inverters, effectively resisting DC bias and preventing core saturation.
Industrial Power Supplies and Variable Frequency Drives: Helps equipment meet stringent electromagnetic compatibility (EMC) standards while reducing equipment footprint.
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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