Engineered for high thermal performance, low RDS(ON), and optimized switching efficiency.
Domestic and commercial refrigeration systems are shifting rapidly from static, single-speed compressor architectures to intelligent, multi-variable speed drives (VSD). This transition is driven by global legislative energy standards, such as the European Union's Energy Label Regulations (Class A to G) and North America's ENERGY STAR® updates.
At the center of this transformation lies the power semiconductor—specifically the Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET). These components dictate the overall system efficiency, thermal output, electromagnetic interference (EMI) margins, and the mean time between failures (MTBF) of the main inverter boards and power supply units (PSU) in modern refrigerators.
As a global solution provider, HONGKONG Olukey INDUSTRY CO., LIMITED is at the forefront of this market evolution, delivering industry-grade WINSOK MOSFETs and integrated Cmsemicon MCU configurations designed to survive the harsh electrical and thermal environments typical of home and industrial refrigeration units.
Voltage Coverage Range
Standard Models Available
Packaging Formats (DFN, TO, SOP)
Factory Defect Rate (AQL Standard)
How and where modern MOSFET configurations act as critical performance enablers.
High-voltage N-channel MOSFETs (ranging from 600V to 650V, e.g., the WSR20N65F in TO-220-3L) are utilized in the main bridge topology of inverter compressors. They control the three-phase brushless DC (BLDC) motors or permanent magnet synchronous motors (PMSM). By optimizing the Gate Charge ($Q_g$) and ensuring a low Drain-to-Source On-Resistance ($R_{DS(ON)}$), our designs prevent thermal runaway under continuous high-load cooling periods.
Internal airflow circulation depends on silent evaporator and condenser fan motors. Low-voltage to medium-voltage MOSFETs (30V to 100V, such as the DFN3X3 or SOP-8 packaged models) ensure quiet, ripple-free operation of BLDC fan drives. A smooth switching performance directly reduces low-frequency acoustic noise in high-end consumer residential refrigerators.
In no-frost refrigerators, high-power heating elements are regularly activated to melt frost accumulation. Heavy-duty MOSFETs switch these resistive loads safely. Simultaneously, ultra-low power SMD MOSFETs (e.g., SOT-23-3L, SOP-8L) are used in auxiliary power stages and micro-controller peripherals, maintaining optimal performance in the IoT-enabled touch display interface.
HONGKONG Olukey INDUSTRY CO., LIMITED relies on long-term relationships with leading global foundries and assembly plants to secure steady component supply for large-scale appliance manufacturing. Our flagship brand, WINSOK MOSFET, has established itself as an excellent choice for major home appliance manufacturers in Asia, Europe, and the Americas.
Supporting high-volume wholesale requirements with zero lead-time disruption.
Our domestic assembly plants and advanced packaging facilities located in South China's electronics hub ensure fast response times for global buyers. With automated wafer probe systems, advanced wire-bonding capabilities, and multi-stage Automated Optical Inspection (AOI), we achieve extremely low defect rates.
Our supply network is designed to mitigate geopolitical supply-chain risks. By keeping raw wafer inventory in strategic hubs and maintaining direct API integrations with leading global shipping lines, we guarantee continuous deliveries even during periods of heavy market demand. This reliability makes us a trusted supply partner for refrigerator manufacturing companies around the globe.
Designed to help you choose the right package and technology path for your refrigerator controller designs.
| Product / Package Type | Primary Refrigerator Sub-system | Key Parameter Advantage | Thermal Management Needs | Cost Efficiency Rating |
|---|---|---|---|---|
| WSR20N65F (TO-220-3L) | Inverter Compressor Main Drive | High Ruggedness, 650V Breakdown | Low $R_{thJC}$ (Heatsink mount recommended) | Excellent Value |
| WSD3050DN33 (DFN3X3-8L) | Low-Voltage DC-DC Power Stage | Ultra-low Gate Charge ($Q_g$), High density | Direct PCB Heat Dissipation | Best for Compact PCBs |
| WSR140N12 (TO-220-3L) | Heater / Defrost Controller | High Continuous Current (140A at 120V) | Medium Heatsink Required | High-Load Performance |
| WST3429 (SOT-23-3L) | Signal Switching & Peripheral Logic | Minimal footprint, Low Switching Losses | Ambient Air Cooling | Highest Economy |
Answers to common technical queries from refrigeration hardware engineers and procurement managers.
Industrial-grade power switches for refrigeration, smart home, and automotive power management.
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