Engineered for high thermal efficiency, low R_DS(on), and optimal switching speeds in PV inverter modules, gate drives, and MPPT arrays.
Why switching efficiency, avalanche ruggedness, and thermal performance dictate solar system service life and Levelized Cost of Energy (LCOE).
Modern PV string inverters and micro-inverters require power semiconductors that operate at elevated switching frequencies. Implementing WINSOK custom MOSFETs allows engineering teams to minimize conduction losses through industry-leading low static drain-source on-resistance ($R_{DS(on)}$). This minimizes dissipation heat and maximizes power extraction from DC solar arrays.
Outdoor utility and commercial solar installations face severe transient voltage spikes due to grid instability and atmospheric lightning. Our custom MOSFET series features high Single-Pulse Avalanche Energy ($E_{AS}$) ratings and $dv/dt$ ruggedness. This prevents catastrophic drain-source breakdown under extreme electrical stress, extending the Mean Time Between Failures (MTBF).
Thermal management is a critical vector in solar inverter engineering. Standard SMT packages struggle under continuous peak-load solar cycles. WINSOK’s optimized packages—including TOLLA-8L, DFN5X6-8L, and TO-263-2L—significantly lower junction-to-case thermal resistance ($R_{\theta JC}$). This enables compact system designs that operate cooler without requiring oversized active heat sinks.
| Topological Stage | Common MOSFET Packages | Crucial Engineering Parametrics | WINSOK Custom Solutions Match |
|---|---|---|---|
| MPPT Boost Stage | TO-220-3L, TOLLA-8L, TO-263-2L | Low $Q_g$, Ultra-low $R_{DS(on)}$, Fast Recovery body diode | WSR140N08, WSR3710, WSM300N04G |
| DC-AC H-Bridge Inversion | DFN5X6-8L, TO-220-3L | High $V_{DS}$ margins, rugged Safe Operating Area (SOA) | WSK150N12, WSK140N08, OEM FDMC81DCCM |
| Auxiliary Power Supply & MCU Gate Drive | SOP-8L, SOT-23-3L | Low input capacitance ($C_{iss}$), micro-amp gate currents | WST02P06, WSTBSS138, WSP14N10 |
| Energy Storage System (ESS) DC-DC | TOLLA-8L, DFN5X6-8L | Bi-directional conduction efficiency, low source inductance | WSM350N04, WSD20L120ADN56 |
As clean energy infrastructure scales globally, sourcing from an integrated, high-capacity fabrication cluster in China is crucial. Hongkong Olukey Industry Co., Limited serves as your direct bridge to these state-of-the-art manufacturing hubs. Leveraging advanced automated cleanroom packaging and testing infrastructure, we deliver high-yield silicon wafers converted into robust, industrial-grade MOSFETs.
Our localized ecosystem enables unmatched raw material procurement, fast turnaround prototyping, and massive wholesale production capacity. This keeps solar inverter manufacturers protected against global supply interruptions while providing direct access to the latest chip designs.
Strict wafer testing protocols conforming to ISO9001 and ISO14001 guidelines.
Co-designed MCU + MOSFET + PCBA solutions for rapid product launches.
How distinct geographic markets and solar system architectures dictate MOSFET parameters.
Deployed directly behind residential solar panels, micro-inverters convert DC to AC locally. These systems experience extreme ambient temperature fluctuations. Designers specify low-voltage (30V–100V) MOSFETs packaged in compact DFN5X6-8L or TOLLA-8L packages, prioritizing zero thermal degradation and minimized package heights to fit thin waterproof housings.
Handling input currents from long solar panels strings, these systems operate at 80V to 150V levels. Designers rely on high-power TO-220-3L or TO-263-2L MOSFET variants, which provide large safe operating areas (SOA) and low thermal resistance to handle continuous high-current load cycles without thermal runaway.
Bi-directional DC-DC chargers must switch rapidly between charging lithium batteries and feeding the AC grid. This requires low gate charge ($Q_g$) and quick reverse recovery body diodes ($Q_{rr}$) to prevent cross-conduction issues, making WINSOK's customized medium-voltage N-channel and P-channel families optimal choice.
HONGKONG Olukey INDUSTRY CO., LIMITED is a leading solution provider focusing on the overall integration of advanced electronic components. Our product portfolio spans three core lines:
Currently, Olukey Industry's components are deployed across automotive electronics, military systems, smart industrial controls, clean energy, medical devices, 5G, and advanced IoT nodes. By maintaining strong relationships with major original factories globally, we provide customers with high-tech semiconductors that help manufacturers build efficient, long-lasting products.
We provide high-quality technical support and comprehensive procurement services to supply industrial-grade components globally. Guided by our principles of "quality first, service first," we have established long-term cooperative partnerships with high-tech enterprises and component distributors worldwide.
Our portfolio of WINSOK MOSFETs covers a broad voltage range: 15V, 20V, 30V, 40V, 60V, 80V, 100V, 120V, 150V, 200V, 250V, 300V, 400V, 500V, 600V, and 650V. We offer package options including DFN3X3-8, DFN5X6-8, TO-252, TO-263, SOP-8, SOT-23, and TO-220, with more than 600 models and 40 package types. This wide product range allows design engineers to find the ideal match for their specific power systems.
Navigating international solar grid codes, trade policies, and high-volume procurement supply agreements.
We work with tier-1 foundries to implement wafer buffer stocks and dual-source production strategies. This helps global procurement managers mitigate supply chain risks, ensuring stable component supply and pricing during peak production cycles.
All customized and wholesale MOSFETs undergo strict reliability tests, including High-Temperature Reverse Bias (HTRB), High-Temperature Gate Bias (HTGB), and Unclamped Inductive Switching (UIS) tests, to guarantee stable operation over decades in clean energy systems.
Our entire product lineup is RoHS and REACH compliant, meeting CE, UL, and VDE standards. This enables global solar inverter manufacturers to quickly clear international environmental and electrical safety audits.
Key technical, design, and purchasing considerations for electronic design engineers and procurement teams.
High-efficiency P-channel, N-channel, and MCU solutions designed for high-density power electronics.
Olukey
