Reliable components engineered for low RDS(ON), high efficiency, and maximum thermal management
The global automotive industry is undergoing a paradigm shift towards electrification. To support this transition, EV powertrains, Battery Management Systems (BMS), On-Board Chargers (OBC), and DC-DC converters require highly reliable and efficient power switches. At HONGKONG Olukey INDUSTRY CO., LIMITED, we specialize in delivering state-of-the-art power semiconductors that optimize energy efficiency and thermal dissipation in electric vehicles.
As a leading solution provider, we integrate global manufacturing resources and distribution networks to provide a comprehensive line of WINSOK MOSFETs, Cmsemicon MCUs, and customized PCBA board solution designs. Our technical engineering teams ensure that every component meets rigorous quality guidelines, allowing wholesale buyers and Tier-1 automotive suppliers to construct robust electronics platforms with high confidence.
Supporting high-power charging networks, auxiliary subsystems, and battery topologies
Ensuring individual cell voltage balancing, state-of-charge calculation, and safety isolation requires MOSFETs with low RDS(ON) to prevent power loss and mitigate thermal runaway.
Stepping down the high-voltage EV battery (400V/800V) to low-voltage auxiliary rails (12V/48V) requires power transistors configured for fast switching speeds and minimum electromagnetic interference.
Delivering fast AC-DC rectification and DC-DC stage regulation within onboard charging bricks, as well as external commercial wallboxes and fast chargers.
Compare the electrical performance parameters of our popular package configurations
| Package Style | Common Voltage Range | Drain Current (ID) | Typical Applications | Thermal Dissipation Capacity |
|---|---|---|---|---|
| DFN3X3-8 / DFN5X6-8 | 15V - 100V | 30A - 350A | BMS Switch, Low-voltage DC-DC stage | Excellent (Exposed metal pad) |
| TO-252 (DPAK) / TO-263 (D2PAK) | 30V - 150V | 40A - 180A | Motor Drives, EPS, Power Distribution Units | High (Optimized for heatsink mounts) |
| SOP-8 / SOT-23 | 20V - 100V | 0.18A - 15A | Signal Switch, Auxiliary Controls, Gate Drivers | Medium (For space-constrained circuits) |
| TO-220 | 60V - 200V | Up to 150A | Industrial Inverters, SMPS Secondary Side | Excellent (Through-hole mounting) |
Selecting a semiconductor manufacturing partner goes beyond basic component matching. It is about supply security, consistent quality control, and field-tested application designs. Our advantages include:
Ensuring compliance with automotive and environmental standards for global integration
We supply selected automotive-grade MOSFET configurations designed to withstand harsh operating temperature profiles, thermal cycles, and mechanical vibrations.
All WINSOK components are halogen-free and compliant with current RoHS and REACH regulations, simplifying export clearance to EU and North American markets.
Our engineering support provides functional pin-to-pin cross-reference sheets against major manufacturers (Infineon, Nexperia, ON Semi, Vishay) to lower component procurement costs.
How we are preparing for next-generation EV power architectures
While low-voltage silicon MOSFETs remain critical for auxiliary units, EV drivetrains are transitioning toward wide-bandgap materials like Silicon Carbide (SiC) and Gallium Nitride (GaN). We are actively aligning our future technical product portfolio to match these developments. Concurrently, packaging technologies are progressing from standard wire-bonded TO packages to clip-bonded DFN and copper-clip variations. These developments reduce parasitic inductance and lower package-related resistance ($R_{DS(ON)}$ package contributions) by up to 30%.
By partnering with Olukey Industry, you receive components engineered using modern wafer fabrication techniques, ensuring long-term product availability for automotive vehicle lifecycle support plans (typically 10-15 years).
Find answers to common engineering and sourcing questions about EV MOSFETs
For Battery Management Systems, the most critical parameters are the static drain-source on-resistance (RDS(ON)), total gate charge (Qg), and safe operating area (SOA). Minimizing RDS(ON) reduces conduction losses, which is critical when handling battery pack discharge currents exceeding 100A.
We act as a complete system solutions provider. Beyond acting as a MOSFET distributor, we utilize Cmsemicon microcontrollers and offer complete circuit design services, layout optimization, and physical prototyping to deliver validated PCB assemblies (PCBA) directly to your production line.
Yes. We keep stock and supply direct cross-references for various industry parts, including latest designs like PANJIT PJQ5478A, NIKO-SEM P81BKA, and POTENS PDC92X. We provide matching footprint configurations in DFN5X6-8, DFN3X3-8, and TO packages.
For standard products that are in stock, we can dispatch shipments from our Asia-Pacific warehouses within 3-5 working days. For bulk production orders requiring customized packaging or custom markings, lead times generally range between 6 to 10 weeks depending on raw material schedules.
Explore our wholesale semiconductor offerings including high current N-channel and P-channel topologies
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