Designed for compact power management modules with high thermal efficiency and minimal gate charge.
Bulgaria has emerged as one of the fast-growing technology and electronics manufacturing clusters in Eastern Europe. Key logistics and production centers like the Trakia Economic Zone (Plovdiv) and the technology parks in Sofia host key electronic assembly houses (EMS), automotive sensors suppliers, and IoT developers. With the steady expansion of manufacturing services for automotive clients, household smart electronics, and clean energy devices, high-reliability semiconductor components have become critical supply assets.
Particularly, low-power discrete devices in Small Outline Transistor (SOT) packaging are highly sought after. They offer a perfect compromise between high-density board integration and effective thermal management. The need for sourcing reliable component alternatives that match the strict standards of European CE, RoHS, and REACH directives without the typical long lead times of mainstream tier-1 semiconductor makers has never been more pressing.
European engineering teams frequently encounter component shortages for standard footprints like SOT-23, SOT-23-3L, SOT-23-6L, and SOT-89. Sourcing managers and system designers require identical pinning, RDS(ON) levels, and gate charge thresholds. Below is an overview of how WINSOK MOSFETs effectively serve as pin-to-pin, highly-reliable replacements for common industry part numbers.
| Footprint / Package | Common OEM Part Numbers | WINSOK Direct / Alt Equivalent | Key Parameters Match ($V_{DS} / I_D / R_{DS(on)}$) | Primary Bulgarian Local Application |
|---|---|---|---|---|
| SOT-23-3L | AO3416, NTR3C21NZ, Si2312CDS, PMV16XN | WST2088 / WST2088A | 20V / 8.8A / 16.5mΩ | Lithium Battery Protection, Smart Water Meters |
| SOT-23-6L | AO6604, SI3585CDV, PJS6601 | WST8205 / WST2078 | 20V / -20V Dual / 3.8A | Automotive Sensor Controls, Embedded Computers |
| SOT-23N | FDC634P, SI3443DDV, PMDT670UPE | WST2333B | -15V / -4.4A / 35mΩ | Plovdiv Cluster Smart Home LED Driver Modules |
| SOT-23-3L | BSO15N3MD, NTMS4916N, Si4128DY | WST05N10 | 100V / 2.8A / 110mΩ | Telecom Power Converters, Sofia R&D Projects |
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. 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.
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, 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.
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.
Sourcing directly from our partner factories in Shenzhen and the wider Guangdong technology region allows European buyers, and particularly Bulgarian EMS manufacturers, to side-step multiple middle layers. The benefits are clear: direct engineering support, access to raw wafer production schedules, and highly automated packaging services. In our partnering factories, modern Automatic Test Equipment (ATE) and Automated Optical Inspection (AOI) processes run 24/7 to guarantee zero-defect PPM targets.
Furthermore, this localized supply route is bolstered by fast air freight corridors linking major logistics hubs like Hong Kong (HKG) directly with Sofia Airport (SOF), as well as cost-effective maritime routes entering the ports of Varna and Burgas. By establishing dedicated buffer stocks with Hong Kong Olukey Industry Co., Limited, European businesses can safeguard their assembly lines against sudden global IC shortages.
We understand that European hardware designers must strictly comply with rigorous environmental and performance directives. The WINSOK range is engineered, manufactured, and documented under standard methodologies:
Direct replacements for common N-channel and P-channel footprints including SOT-23, SOT-23-6L, and SOT-23N.
Clear answers regarding supply chains, equivalent cross-references, and localized application design for engineers and procurement managers.
Olukey
