Select high-performance components engineered for low RDS(on), robust SOA, and superior thermal efficiency.
The global transition toward clean energy, electrified mobility, and decentralized power grids has accelerated the demand for high-reliability Battery Management Systems (BMS). At the core of every BMS, the power MOSFET acts as an electronic switch executing protection protocols—preventing catastrophic thermal runaway, overcharge, over-discharge, and short-circuit conditions.
Whether in utility-scale Energy Storage Systems (ESS), electric vehicles (EVs), light electric vehicles (LEVs like e-bikes and e-scooters), or smart medical devices, the reliability of the system hinges on the efficiency of its power switching devices. As power densities increase, designers require semiconductors that deliver exceptionally low drain-source on-resistance (RDS(on)) to minimize conduction losses, alongside robust Safe Operating Areas (SOA) to survive transient surge events.
Demonstrated capacity and market leadership in global semiconductor distribution and solution designs.
Global supply chain volatility has made sourcing components from single-brand manufacturers a massive risk for OEMs and EMS providers. Engineers and purchasing directors often struggle with sudden lead-time extensions, product obsolescence, and price spikes from legacy semiconductor brands.
HONGKONG Olukey Industry Co., Limited answers this industry challenge by providing high-performance, pin-to-pin drop-in replacements. We enable procurement departments to cross-reference legacy brands (such as Infineon, ON Semi, STMicroelectronics, and Nexperia) to high-reliability Winsok MOSFET designs. This approach guarantees zero redesign friction, maintains the original PCB footprint, and often yields superior electrical parameters.
Our replacement methodology ensures: identical pin-outs, equivalent gate thresholds ($V_{GS(th)}$), similar total gate charges ($Q_g$), and enhanced avalanche energy immunity ($E_{AS}$).
Winsok's medium and low-voltage product lines cover a comprehensive range of specifications engineered for BMS requirements.
Voltages covering 15V, 20V, 30V, and 40V. Designed primarily for single-cell to multi-cell consumer battery packs. Leveraging ultra-compact footprints like DFN3x3-8 and SOP-8 to minimize space while keeping RDS(on) under 2 milliohms.
Voltages covering 60V, 80V, 100V, and 120V. Ideal for LEV drivetrains, industrial battery modules, and telecom back-up packs. Heavy-duty packages like TO-252, TO-263, and DFN5x6-8 offer optimized thermal paths for continuous high-current discharge.
Voltages covering 150V, 200V, 250V, 300V, 400V, 500V, 600V, and 650V. Optimized for utility-scale energy storage, off-grid solar arrays, and high-voltage industrial UPS systems requiring robust isolation and low switching EMI.
| Voltage Node | Common Packages | Target BMS Configurations | Winsok Reference Series | Key Advantages |
|---|---|---|---|---|
| 15V - 40V | DFN3X3, DFN5X6, SOP-8 | 1S - 7S (Laptops, Power Tools) | WSD/WSP Series (e.g., WSD30L90DN56) | Ultra-low gate charge, compact layout |
| 60V - 100V | DFN5X6-8, TO-252, TO-220 | 10S - 20S (E-Bikes, E-Scooters) | WSF/WSR Series (e.g., WSF70N10) | Exceptional avalanche thermal performance |
| 100V - 200V | TO-263, TO-220, DFN5X6-8 | 24S - 48S (Telecom, Light AGVs) | WSK/WSR Series (e.g., WSK35N25) | Minimized switching losses at high frequencies |
| 250V - 650V | TO-220F-3L, TO-247 | High Voltage Industrial ESS / EV Chargers | WSR Series (e.g., WSR10N65F) | High dv/dt ruggedness, enhanced electrical isolation |
HONGKONG Olukey Industry Co., Limited does not operate solely as a passive parts component supplier. We recognize that modern electronics engineering requires unified system architecture. By utilizing the corporate synergies between Winsok MOSFETs, Cmsemicon MCUs, and our custom PCBA design capabilities, we supply clients with complete, integrated BMS platforms.
Our engineers design customized PCBA solutions that combine advanced Cmsemicon microcontrollers (built on robust ARM Cortex or high-speed proprietary cores) with precision Winsok power stages. This single-source strategy dramatically simplifies supply chains, guarantees driver compatibility, and cuts time-to-market by half.
Advanced algorithm processing, precise ADC cell-monitoring, and dynamic state-of-charge (SoC) calculations.
Execution layer with ultra-fast switching, high thermal headroom, and industry-leading reliability under short circuits.
Leveraging original factory alliances and comprehensive logistics networks to support our clients' scaling requirements.
We use comprehensive, high-quality services to provide customers with various types of advanced high-tech electronic components, assist manufacturers in producing high-quality products, and provide comprehensive system integration support. Over the years, the company has relied on reputation to survive, adhering to the core tenet of "Quality First, Service First." We have established deep, mutually beneficial cooperative relationships with many high-tech enterprises and original manufacturers at home and abroad.
Relying on the advantages of global general agents of major original manufacturers, we are firmly based in the Asia-Pacific market. Through active market development and effective resource integration, we have become one of the outstanding and fast-growing electronic component distributors in the region.
Becoming a global high-value agent is the common goal pursued by OLUKEY Industrial employees. We adhere to the corporate values of "Pragmatism, Win-win, Service, and Responsibility", continuing to strengthen service quality and aim to provide high-quality services. We work hand-in-hand with suppliers to jointly explore a larger market and contribute to the prosperity and development of the global semiconductor ecosystem.
How our product lines are adapting to the next generation of power electronics and high-efficiency BMS topologies.
By continuing to refine SGT structure on silicon wafers, Winsok reduces charge accumulation, which in turn drops gate-to-drain charge ($Q_{gd}$) to exceptionally low limits, dramatically lowering switching losses in high-frequency battery chargers.
High-current energy storage requires components that can handle more than 200A of continuous current. We are shifting legacy package sizes (like TO-220 and TO-263) toward ultra-low profile TOLL (TO-Leadless) configurations to reduce stray inductance by 60%.
As high-voltage battery modules exceed 800V (particularly in EV architectures), we are researching wide bandgap (GaN and SiC) driver integrations to withstand higher thermal stresses and reach higher electrical breakdown thresholds.
Delivering high-reliability semiconductor products into industries like automotive and industrial medical equipment means holding ourselves to strict international testing standards. We make sure all Winsok MOSFET fabrications and packaging solutions undergo rigorous inspections.
By working closely with regional engineering field application teams, HONGKONG Olukey Industry Co., Limited provides rapid, in-circuit analysis to help customer engineers choose the right parts. Additionally, our "Free Sample for BMS Replacement" program provides free prototyping components so your team can test actual in-circuit performance before committing to volume purchases.
Get direct answers to common questions about selecting MOSFETs for BMS designs, pin-to-pin replacement, and requesting free samples.
Explore our expanded list of microcontrollers, magnetic wireless charging solutions, and high-performance MOSFET packaging designs.
Olukey
