Explore high-performance N-channel, P-channel, and Dual MOSFETs built for heavy thermal load handling and ultra-low internal resistance.
Lithium battery management circuits demand exceptionally high reliability and low thermal footprints. The switch towards high-capacity cells requires MOSFETs capable of executing rapid transitions while minimizing conduction losses. At the heart of safety modules, the charge and discharge paths are regulated by switching power MOSFETs that block reverse current and prevent overcharging, over-discharging, and short-circuit conditions.
Choosing the correct replacement MOSFET involves analyzing critical static and dynamic parameters:
Our solutions feature highly optimized trench gate structures that drastically lower specific on-resistance ($R_{DS(on)}$ per unit area), improving thermal management and reliability.
Bridging global semiconductor demands with high-value design services and agile manufacturing.
HONGKONG Olukey INDUSTRY CO., LIMITED is a solution provider focusing on the overall solution of electronic product components. The main products mainly include: WINSOK MOSFET, Cmsemicon MCU, PCBA circuit board solution development and other three types of product lines. Relying on the advantages of global general agents of major original factories, we are based in the Asia-Pacific market. Provide customers with various advanced high-tech electronic components by using comprehensive superior services, assist manufacturers in producing high-quality products and provide comprehensive services.
At present, the products of Olukey Industry are widely used in automotive electronics, military electronics, smart industry, new energy, smart medical care, 5G, Internet of Things, smart home, and various consumer electronics products. We align our engineering capabilities with high-density designs to reduce components' footprint while improving safety margins across complex designs.
A look at our structural advantages, quality commitments, and unmatched service offerings in the Asia-Pacific region.
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.
Relying on the advantages of global general agents of major original manufacturers, we are based on the Asia-Pacific market. Through active market development and effective resource integration, it has become one of the outstanding and fast-growing agents in the Asia-Pacific region. The company has many years of professional distribution experience. We use our comprehensive advantageous services to provide customers with various types of advanced high-tech electronic components, assist manufacturers in producing high-quality products and provide comprehensive services.
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, etc. There are more than 600 models and more than 40 packages. Extensive coverage of medium-voltage and low-voltage MOSFET product lines on the market.
Combining automation, strict validation standards, and volume capacity to guarantee product consistency and dynamic lead times.
Cmsemicon MCU is a microcontroller company born in Shenzhen, with rich product types and technology research and development experience. 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.
By leveraging automated packaging units and AOI-driven (Automated Optical Inspection) systems, our partner factories minimize production variances. This level of quality management is crucial for replacement applications in heavy-duty battery packs where even minor variation in MOSFET performance can lead to localized heating, imbalance, and accelerated cell degradation.
How next-generation power structures will change battery safety, efficiency, and switching speeds.
While standard silicon MOSFETs remain cost-effective, we are optimizing the design for GaN hybrid paths to support high-frequency switching. This dynamic architecture reduces package dimensions by up to 40% while preserving thermal stability.
With battery compartments becoming increasingly compact, we are transitioning from bulky through-hole packages like TO-220 to surface-mount TO-Leaded (TOLL) and ultra-thin PDFN styles. This path yields up to a 60% board space savings.
The convergence of Cmsemicon MCU logic with smart power switches represents our vision for future battery systems. Integrated driver-MOSFET stages allow real-time temperature sensing directly at the junction, blocking overcurrent before failures occur.
Custom power switching topologies tailored to the operational demands of diverse high-reliability sectors.
Electric bikes, scooters, and urban transport packs rely on constant cell balancing and power density. MOSFETs must resist vibrations and deliver massive currents under start-up load. High-current packages like TO-263-2L and TO-252 provide the thermal mass and current capacity to safely handle peak starting torque without degradation.
Large-scale LiFePO4 battery banks used in microgrids require robust protection systems that stay active for years. In these applications, static power consumption must be minimized. Our low-conduction-loss trench MOSFETs reduce standby power draw, extending overall energy system round-trip efficiency.
Power drills, circular saws, and leaf blowers generate high transient voltage feedback. High-drain designs demand rapid current interruption during rotor locking. Our dual-channel MOSFET topologies provide robust clamping parameters ($E_{AS}$) to absorb transient energy without breaking down.
Ensuring compliance, global logistics integration, and technical application engineering across continents.
Global procurement teams struggle with lead-time volatility and obsolescence. olukey Industry works to prevent supply interruptions. We maintain structural safety stock of wafers and active packages to ensure consistent volume shipments, shielding customers from seasonal price hikes and sudden raw material supply shocks.
Every batch of our MOSFETs is compliant with international environmental directives including RoHS and REACH regulations. We provide complete material declaration sheets to simplify documentation requirements during our clients' CE, UL, and FCC certification procedures.
We provide localized technical assistance. Field Application Engineers (FAEs) help design teams optimize PCB trace routing, analyze gate drive ringing, and perform thermal simulation studies to ensure new components integrate seamlessly with existing microcontrollers and BMS chipsets.
Get professional answers to common questions about selecting and replacing MOSFETs in modern battery management systems.
Thermal runaway occurs when a MOSFET's junction temperature rises, causing its $R_{DS(on)}$ to increase due to its positive temperature coefficient. If current levels remain steady, this resistance increase drives dissipation higher, creating a destructive feedback loop. Designers can prevent this by selecting devices with exceptionally low $R_{DS(on)}$ (like our WSF40130 or WSD30140DN56), applying thermal vias, and sizing the gate driver to minimize switching transition time.
In battery protection circuits, when high-inductive loads are switched off, current flows through the MOSFET's body diode. A high $Q_{rr}$ leads to severe voltage overshoot and EMI issues during reverse recovery. Our modern trench designs optimize body diode performance to achieve low $Q_{rr}$ and fast recovery characteristics, protecting the circuit without needing auxiliary snubber networks.
Dual packages (such as our WSD3023DN56 or WSD3043DN33) save space and reduce routing complexity on high-density PCBs. N+P complementary channels are ideal for H-bridge drivers or bidirectional switches, as they simplify gate drive circuitry. Dual N-channel options are often utilized in common-drain or common-source configurations within BMS units to block charging and discharging currents independently.
A general safety guidelines is to select a MOSFET with a $V_{DS}$ rating at least 1.5 to 2 times the nominal stack voltage of the battery pack. For a 24V lithium battery pack, a 40V or 60V rated MOSFET is recommended. This headroom protects the device from transient spike damage caused by rapid circuit break events under high short-circuit currents.
Find advanced packaging solutions, dual-channel silicon dies, and high-density chips for compact power designs.
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