Explore our highly-acclaimed medium and low-voltage MOSFET inventory, engineered for low RDS(on), robust thermal performance, and absolute compatibility with LiFePO4 battery architectures.
Lithium Iron Phosphate (LiFePO4) battery chemistry has emerged as the premier choice for stationary energy storage systems (ESS), light electric vehicles (LEVs), marine propulsion, and backup power grids. This popularity stems from its unparalleled thermal stability, extended cycle life (often exceeding 3,500 to 6,000 cycles at 80% DoD), and inherently non-toxic composition compared to cobalt-based variants. However, to harness these benefits safely and efficiently, Battery Management Systems (BMS) must incorporate robust protection circuits.
At the core of every modern BMS is the solid-state switch assembly, which must regulate high-current discharge, charge cut-off, over-current protection, and active cell balancing. Power MOSFETs act as these primary switches. Choosing the right MOSFET requires a precise balance between low static drain-source on-resistance ($R_{DS(on)}$) to prevent excessive heat buildup, high pulsed drain current ($I_{DM}$) to handle surge demands, and exceptional thermal dissipation package technology.
As tier-one European and American semiconductor manufacturers experience prolonged lead times and rising cost structures, global OEMs are seeking high-reliability alternative products. Providing premium alternative solutions that preserve electrical integrity while maintaining highly competitive purchase costs is crucial for modern high-growth supply chains.
Discover the engineering strength behind Hongkong Olukey Industry Co., Limited, your global partner for comprehensive semiconductor and PCBA solutions.
HONGKONG Olukey INDUSTRY CO., LIMITED is a leading solution provider focusing on the overall integration of premium electronic product components. Our core competencies span across three highly synergistic product lines:
At present, the products of Olukey Industry are widely utilized in automotive electronics, military systems, smart industrial applications, new energy conversion systems, smart medical care devices, 5G infrastructure, Internet of Things (IoT) endpoints, smart home appliances, and various consumer electronics. Relying on the advantages of global general agents of major original factories, we are based in the Asia-Pacific market. We provide customers with various advanced high-tech electronic components using comprehensive superior services, assisting manufacturers in producing high-quality products and providing comprehensive support.
Combining world-class engineering, supply chain resilience, and a robust silicon portfolio to support your green energy storage transformations.
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 services. Over the years, the company has relied on reputation to survive, adhering to the tenet of "quality first, service first," and has established good cooperative relationships with many high-tech enterprises and original manufacturers at home and abroad.
WINSOK MOSFET's product voltages are mainly medium and low voltage: 15V, 20V, 30V, 40V, 60V, 80V, 100V, 120V, 150V, 200V, 250V, 300V, 400V, 500V, 600V, 650V. The main packages include DFN3X3-8, DFN5X6-8, TO-252, TO-263, SOP-8, SOT-23, TO-220, and more, offering extensive coverage of medium-voltage and low-voltage MOSFET product lines on the market.
Alongside our premium MOSFET range, we represent Cmsemicon MCU, a microcontroller company born in Shenzhen, with rich product types and technology research and development experience. Through active market development and resource integration, we provide a unified chip solution that integrates MCU control with MOSFET switching mechanics.
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", continue to strengthen service quality, and aim to provide high-quality services. Work hand in hand with suppliers to jointly explore a larger market and contribute to the prosperity and development of semiconductors.
How Winsok MOSFET products are deployed across commercial, industrial, and consumer energy applications globally.
E-bikes, electric scooters, and low-speed electric vehicles (LSEVs) operate under severe dynamic loads. Vibrations and extreme ambient temperatures put pressure on the BMS. Our TO-220-3L (e.g., WSR135N15, 150V 135A) and DFN5X6-8L MOSFETs provide the necessary peak current handling capability. They feature low transient thermal impedance to manage regenerative braking current spikes without suffering thermal runaway.
Outdoor solar chargers rely on high-efficiency charge controller circuits to convert photovoltaic energy into LiFePO4 cells. Utilizing low gate charge ($Q_g$) MOSFETs like the WSD4070DN33 (40V 68A) reduces dynamic switching losses in buck-boost converters, ensuring maximum power point tracking (MPPT) efficiencies exceed 98%.
Large-scale energy storage battery packs, configuration 16S (48V nominal) or higher, require heavy-duty safety disconnect systems. Using devices like the WSM400N06G (60V 400A TOLLA-8L) allows designers to minimize the number of paralleled MOSFETs. This reduces PCB layout area, minimizes parasitic inductance, and simplifies gate driver routing.
Automated Guided Vehicles (AGVs) and cordless power tools require high starting torque, prompting brief but massive current draws. MOSFETs deployed here must feature a wide Safe Operating Area (SOA) and robust avalanche ruggedness ($E_{AS}$). Winsok’s medium-voltage products are built with advanced trench technologies that optimize cell density, ensuring reliable operation under high inductive load kickbacks.
Unlocking the next generation of power conversion efficiency through advanced silicon architecture and cutting-edge packaging design.
Modern power electronics demand continuous reduction in specific on-resistance ($R_{sp}$). Winsok is actively migrating its medium-voltage product lines (40V–150V) to Split-Gate Trench (SGT) architectures. SGT technology significantly reduces both $R_{DS(on)}$ and gate-to-drain charge ($Q_{gd}$). This translates directly to cooler operation in high-frequency switching circuits and enables higher power densities in compact BMS enclosures.
Traditional leaded packages like TO-220 have internal wire bond limiters that constrain performance. The industry is moving rapidly toward leadless packages. The TOLLA-8L (as seen in our WSM400N06G) reduces package resistance by replacing wire bonds with copper clips. This configuration accommodates currents up to 400A, while reducing footprint space by 60% compared to standard D2PAK (TO-263) packages. Winsok is committed to expanding its leadless package portfolio to meet these demanding requirements.
By pushing the boundaries of silicon efficiency, Winsok ensures that power engineers can easily implement compact, high-efficiency, and cost-effective designs across all green energy sectors.
How we mitigate supply chain risk, guarantee stable pricing, and secure consistent component allocation for global manufacturers.
Situated in Shenzhen and Hong Kong—the epicenter of global electronics manufacturing—we operate within a fully integrated supply network. From raw wafer procurement to packaging, testing, and distribution, our localized pipeline dramatically lowers logistics and overhead costs. This proximity translates to competitive pricing and robust production adaptability for our customers.
While global wafer shortages frequently disrupt major semiconductor suppliers, Olukey Industry maintains strategic raw material reserves. This buffer allows us to maintain consistent lead times of 4 to 8 weeks on standard MOSFET parts, compared to the industry average of 20+ weeks. This planning security keeps our partners' assembly lines running smoothly.
We provide engineering validation samples (Free Samples) to support the design phase. Hardware designers can request direct drop-in replacement samples for functional testing and evaluation. This hands-on verification process helps accelerate the transition from initial design to mass production.
A strategic look at how Winsok MOSFETs provide premium alternatives to traditional semiconductor suppliers.
Global logistics and sourcing strategies are moving toward "China + 1" dual-sourcing models. Relying on a single chip manufacturer presents operational risks. Winsok products serve as reliable pin-to-pin alternatives for many standard industry parts.
Whether you are replacing traditional MOSFETs in consumer chargers or heavy-duty industrial battery switches, our products match or exceed the electrical parameters of leading market options. By aligning $V_{DS}$, $I_{D}$, and gate charge characteristics, engineers can transition to Winsok products with minimal layout modifications.
Ensuring that our products meet environmental, regulatory, and technical support standards worldwide.
All Winsok products comply with environmental standards like RoHS 2.0, REACH, and relevant halogen-free directives. These compliance records simplify qualification processes for export-oriented battery manufacturers supplying European and American markets.
Olukey Industry provides direct Field Application Engineer (FAE) support. Our engineering team assists with circuit schematic reviews, PCB thermal optimization, and alternative component matching, helping to resolve potential layout issues before prototype fabrication.
We provide complete technical documentation, including datasheet packages, SPICE models, thermal characteristics profiles, and cross-reference matrices. This documentation simplifies verification and validation during component approval stages.
Detailed engineering inquiries regarding battery management system design and Winsok MOSFET applications.
The on-resistance ($R_{DS(on)}$) of silicon MOSFETs increases with junction temperature ($T_j$), typically by a factor of 1.5 to 1.8 at $150^\circ\text{C}$ compared to $25^\circ\text{C}$. Designers must calculate worst-case conduction losses ($P_{cond} = I_{rms}^2 \times R_{DS(on)Max}$) at maximum operating temperature. Using low-coefficient options like the WSM400N06G helps prevent thermal runaway in compact battery enclosures.
The gate charge ($Q_g$) determines the energy needed to transition the MOSFET between its off and on states. High $Q_g$ requires more drive current from the BMS microcontroller or gate driver. Choosing a lower $Q_g$ component reduces switching losses, limits driver heating, and ensures cleaner switching transitions, particularly in high-speed battery disconnect configurations.
Yes, silicon MOSFETs feature a positive temperature coefficient for $R_{DS(on)}$, which naturally helps balance current sharing in parallel operations. For optimal performance, minimize parasitic loop inductances and match the gate traces to prevent switching oscillations. Using high-current packages like TOLLA-8L is also recommended to simplify layout design.
Our MOSFETs undergo 100% Single Pulse Avalanche Energy ($E_{AS}$) testing during production. This ensures the devices can safely absorb transient energy kickbacks from motor windings, long battery leads, or sudden load disconnects without degradation.
Design engineers can submit requests directly through OLUKEY Industry's sales channels. Simply provide your target application, schematic requirements, and required quantities, and our team will dispatch validation samples along with complete technical documentation.
Browse our complete catalog of low-to-medium voltage devices, designed to meet the electrical requirements of industrial, automotive, and battery management platforms.
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