Premium WINSOK MOSFETs and controllers engineered for low RDS(on), robust switching characteristics, and maximum thermal stability.
Variable speed compressor motors, multi-stage inverter systems, and power factor correction (PFC) modules require advanced power semiconductors that can endure transient loads, operate efficiently under high ambient heat, and maintain a compact design profile.
Our solutions, utilizing high-performance WINSOK MOSFETs combined with intelligent Cmsemicon MCUs, serve as the backbone for air conditioning controller systems. Operating from low to medium voltages (15V up to 650V), our product lines address DC-DC conversion, synchronous rectification, BLDC indoor/outdoor fan control, and thermal protection schemes across consumer, commercial, and industrial HVAC environments.
For systems that demand continuous duty cycles under intense load profiles, switching losses can significantly impact the Seasonal Energy Efficiency Ratio (SEER). Our design methodologies prioritize minimizing gate charge ($Q_g$) and achieving class-leading on-state resistance ($R_{DS(on)}$) parameters.
Active Semiconductor Models
High-Density Package Formats
Comprehensive Voltage Portfolio
Lead-Time Supply Failures
In a dynamic supply chain landscape, reliance on single-source suppliers presents vulnerability. Partnering with a specialized solution provider in the Asia-Pacific region offers distinct supply advantages.
We do not just supply MOSFETs; we integrate WINSOK discrete devices, Cmsemicon MCUs, and custom PCBA layout designs. This minimizes integration cycles and prevents design conflicts.
With package variations ranging from DFN3X3-8, DFN5X6-8, SOP-8, SOT-23, to TO-252, TO-263, and TO-220, our configurations match key requirements for power density, thermal dissipation, and automated assembly.
We offer equivalent components for major international semiconductor brands (Infineon, STMicroelectronics, ON Semi, Panjit, Potens, etc.). This ensures design flexibility and supply stability.
Our manufacturing and engineering facilities deliver reliable semiconductor solutions, ensuring standard-compliant quality at every level.
Modern residential and commercial inverter air conditioning systems rely on a range of power stages. Our engineering approach addresses each critical junction:
A quick-reference guide for system design engineers evaluating equivalents for classic architectures in HVAC control loops.
| Typical Equivalent Target (Industry Standards) | WINSOK Recommended MOSFET Part | Configuration / Voltage | Ideal Application Scenario | Primary Package Alternative |
|---|---|---|---|---|
| STL5DN6F7 / PSMQC73N6NS1 | WSD25280DN56G / WSF3085 | N-Channel (25V - 30V) | Low-side synchronous rectification, DC-DC buck stages | DFN5X6-8 / TO-252 |
| AON6661 / AON6667 | WSK140N08 / WSF160N10 | N-Channel (80V - 100V) | BLDC outdoor fan motor drive, inverter power stage | TO-263-2L / TO-252-2L |
| Si3585CDV / AO6604 | WST3407A / WST6003 | P-Channel / Complementary | Control switch, auxiliary power rail protection | SOT-23-3L / SOT-523-3L |
| PDC696X / PDC3701T | WSF20N20G / WSF25N20 | N-Channel (200V) | Active resonant reset, industrial power supply stage | TO-252-2L / DFN5X6-8 |
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.
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. 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 through our comprehensive services, assisting manufacturers in producing high-quality products and providing comprehensive support.
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, we have become an active agent 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 support.
We use comprehensive, high-quality services to provide customers with advanced, high-tech electronic components, assist manufacturers in producing high-quality products, and provide comprehensive support. Over the years, the company has relied on its reputation to grow, adhering to the tenet of "quality first, service first," and has established 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, etc. There are more than 600 models and more than 40 packages, offering extensive coverage of medium-voltage and low-voltage MOSFET product lines on the market.
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. We work hand in hand with suppliers to jointly explore a larger market and contribute to the development of the semiconductor industry.
Explore the full portfolio of microcontrollers, high-current discrete switches, and dual channel modules for optimal HVAC architecture integration.
Direct answers regarding engineering integration, procurement alternatives, and technical specifications for HVAC controller designs.
WINSOK MOSFETs, including medium-voltage types like the WSK140N08 or WSD60N10GDN56, offer equivalent electrical performance ($R_{DS(on)}$, $Q_g$, and switching times) to major brands like Infineon, ST, and ON Semi. They provide a cost-effective alternative for secondary sourcing or main design integration in consumer-grade and industrial inverter modules.
Integrating these components helps reduce signal noise issues between the gate driver stage and the MCU's PWM output. By sourcing both the microcontroller (such as the CMS32L032) and the MOSFETs through Olukey Industry, developers can work with a single supplier to optimize the layout of their PCBA, reducing the risk of component mismatches during mass production.
For outdoor fan controllers subject to high temperatures and humidity, we recommend rugged packages like the TO-252-2L, TO-263-2L, or DFN5X6-8. These packages provide low thermal resistance ($R_{thJC}$) and high power dissipation ratings, helping to prevent thermal issues during peak summer operation.
Our products undergo rigorous testing processes, including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and standard automated optical inspection (AOI). This helps ensure consistent reliability in demanding applications like automotive, industrial, and residential HVAC systems.
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