Oriental Semiconductor Won the “2025 Heart-to-Heart & Full Support Award” from MaiTian Energy

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Company Founded in 2008, the company has a registered capital of RMB 122,531,446. It was listed on the Sci-Tech Innovation Board (STAR Market) of the Shanghai Stock Exchange on February 10, 2022, with the stock code: 688261.

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All products SJ MOSFETs SGT MOSFETs IGBTs Trench MOSFETs Power Module SiC MOSFETs GaN HEMT Power IC

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The company's main products include the GreenMOS series of Super Junction MOSFETs, SFGMOS and FSMOS series of Shielded Gate MOSFETs, TGBT, SuperSi²C MOSFETs, SuperSi MOSFETs and SiC MOSFETs. These products are widely applicable to industrial and automotive-grade application scenarios, represented by new energy vehicle DC charging piles, on-board chargers (OBC), photovoltaic inverters, energy storage systems, 5G base station power supplies, telecom power supplies, data center server power supplies, industrial lighting power supplies, power tools, intelligent robots, unmanned aerial vehicles (UAV) and UPS power supplies. They are also used in consumer electronics applications such as PC power supplies, adapters, TV power boards, fast chargers for mobile phones and electromagnetic heating products.

In order to meet the demand of high efficiency and minification of power supply system, Oriental Semiconductor has launched a new GreenMOS series of high voltage MOSFET, which adopts unique patented device structure and manufacturing process. GreenMOS product has faster switching speed and softer switching curve than conventional MOSFET, which can greatly restrain switch oscillation while obtaining extremely low dynamic loss. It can not only greatly improve system efficiency and reduce heating, but also simplify system EMI design.

Oriental Semiconductor’s SFGMOS Series MOSFET adopts Semi-Floating Gate structure, which combines the advantages of traditional planar structure and SGT structure of power MOSFET, and has the advantages of higher process stability and reliability, faster switching speed, smaller gate charge and higher application efficiency. SFGMOS Series MOSFET products cover the whole series of 20V~200V, which can be widely used in motor driver, synchronous rectification, etc.

Oriental Semiconductor's IGBT chips adopt a unique Trident-Gate Bipolar Transistor (TGBT) device structure to achieve lower on-state voltage drop and reduced switching losses.Multiple series of first and second-generation TGBT products have been successively launched, covering voltage ranges from 600V to 1700V. These products are suitable for applications such as photovoltaic energy storage inversion, DC charging piles, automotive main drive, OBC, and UPS. Additionally, Oriental has developed an ultra-high-speed series TGBT with an operating frequency of 60-100 kHz, which meets the demands of further high-frequency power systems while delivering higher efficiency.

Trench MOSFET: Reliable and Trustworthy Performance Through extensive development，we continuously expand our product portfolio with advanced small signal MOS and power MOS solutions. Our comprehensive product portfolio provides the flexibility needed in today's market, easily choose the product that best suits for you. Our leading technology ensures the highest reliability and performance, while advanced packaging enhances resistance and thermal performance while reducing size and costs.

Advanced power modules, including IGBTs, MOSFETs, SiC, Si/SiC hybrid modules, diodes, SiC diodes, and intelligent power modules. IGBT modules are used in applications such as main drive and DC-AC class solar inverters, energy storage systems, uninterruptible power supplies, and motor drives. MOSFET modules are used in automotive motor drives and on-board charger applications, with voltage ratings of 40 V, 60 V, 80 V, and 650 V, and use super-junction technology and inductive resistors.

Third-generation semiconductor material power devices are one of the important components of high-performance power devices in the future. The R&D team of Oriental has rich experience in wide bandgap semiconductor research and has developed a series of SiC MOSFETs.

Gallium Nitride High Electron Mobility Transistors (GaN HEMT) are increasingly becoming the choice for mainstream markets. For various high-voltage and low-voltage application scenarios, GaN HEMTs offer the fastest switching capabilities (with the highest dv/dt and di/dt) and superior energy efficiency performance. In addition, the self-developed GaN HEMTs by Oriental Semiconductor Co., Ltd. have reduced conduction losses and switching losses through innovative designs, further improving power density.

When connected in series with a power source, the OSP5050 high side OR-ing FET controller is used in conjunction with an external NMOSFET as an ideal diode rectifier. This OR-ing controller allows MOSFETs to replace diode rectifiers in distribution networks, thereby reducing power loss and voltage drop.

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Application The products of Oriental Semiconductor cover a wide and specific range of application fields. In automotive electronics, the company has made in-depth deployment in electrification, covering on-board charging, various electronic control systems and thermal management. In the industrial and energy sectors, it provides solutions for battery testing, photovoltaic inversion and industrial power supplies. Meanwhile, its products also serve multiple key industries including consumer electronics (e.g., fast charging, televisions), household appliances (e.g., refrigerators, vacuum cleaners), communication facilities (e.g., data center power supplies) and motor drives (e.g., robots, UAVs, forklifts).

Automotive Electronics On-Board Charger (OBC) Automotive DC-DC Converter Automotive Lighting DC-DC Converter Body Domain Controller Electronic Power Steering (EPS) Electronic Water Pumps & Electronic Oil Pumps & Fan Drivers PTC Heater High-Voltage Electric Compressor (HVAC)

Power Supplies for Data Center AIDC Data Center AC-DC Converter DC-DC Converter

Consumer Electronics PD Chargers & Adapters TV Power Supply Printer System Power Tools

Industrial Applications Battery Formation and Testing PV Micro-inverters Residential Energy Storage Inverters String PV Inverters Industrial Power Supplies Charging Pile Power Modules

Household Appliances Vacuum Cleaners Refrigerator Compressors Fan Drivers

Communication Technology Communication Power Supplies DC-DC Converters

Motor Drives Forklift Drivers Aircraft and Drones

Robotics Robotic Vacuum Cleaners Humanoid Robots

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Quality Management Date of Certification for ISO 9001 Quality Management System: January 11, 2016. Date of Certification for CNAS 17025 Laboratory Management System: March 3, 2025

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Investor Relations Oriental Semiconductor is committed to establishing an effective communication mechanism with investors. Through transparent, timely and accurate information disclosure and communication, we help investors gain a comprehensive and objective understanding of the company’s strategies, operating status, financial performance and future development prospects. We ensure that all investors receive information of equal quality, build trusting relationships with them, and thereby enable the company’s intrinsic value to be reasonably reflected in the capital market.

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Gathering in Wenzhou, Renewing Our Friendship

On January 31, 2026, MaiTian Energy’s first Partner Exchange Conference was grandly held in Wenzhou, a city renowned for its pioneering spirit. This was not only a review of business performance but also a grand gathering of suppliers and partners in MaiTian’s extended network.

Partners from all over the country made their way from busy production lines to gather in Wenzhou. Together, they reviewed the moments of working side by side over the past year, and in a relaxed and warm atmosphere, kicked off in-depth collaboration for 2026. As a key partner of MaiTian Energy in power devices, Oriental Semiconductor was invited to attend, raising a toast and celebrating with numerous new and old partners.

Strength Recognized, Awarded the “Heart-to-Heart & Full Support”

During the exciting award ceremony at this exchange event, Oriental Semiconductor was honored with the 2025 Heart-to-Heart & Full Support Award for its outstanding product performance, stable supply chain support, and efficient responsive service.

Collaborative Innovation Between Oriental Semiconductor and MaiTian Energy:Technology Empowerment and Strategic Symbiosis

As a key partner of MaiTian Energy in the field of power devices, Oriental Semiconductor’s high-performance products are deeply integrated into MaiTian Energy’s application scenarios, including critical technical modules of photovoltaic inverters (string inverters, energy storage inverters):

1、Product Synergy: Oriental Semiconductor’s product portfolio, including high-voltage Super-Junction MOSFETs, TGBT series IGBTs, and SiC MOSFETs, features low on-resistance, high switching efficiency, and excellent reliability, perfectly matching MaiTian Energy’s demand for high-performance and high-stability power devices. For instance, Oriental Semiconductor’s GreenMOS series is applied in MaiTian Energy’s photovoltaic inverters and energy storage systems, improving energy conversion efficiency and helping MaiTian Energy reduce total system cost.

2、Technical Innovation Collaboration: Leveraging proprietary technologies, Oriental Semiconductor’s SiC MOSFET products deliver industry-leading gate oxide reliability, making them well-suited for high-frequency and high-temperature operating scenarios in MaiTian Energy’s solutions. Through a joint R&D platform, the two parties have collaboratively optimized the power density and thermal performance of modular energy storage systems. In 2025, they launched additional product lines including SGT, SiC, and Trench series, which support MaiTian Energy’s photovoltaic inverters (string inverters and energy storage inverters) across various application scenarios.

2026 Vision: United Together, Stronger Support, Greater Success.

Though the gathering was brief, our friendship endures.

As we stand at the new starting point of 2026, Oriental Semiconductor will continue to focus on high-performance, high-reliability power devices and solutions, committed to becoming MaiTian Energy’s most solid and trustworthy long-term partner.

Going forward together leads to far-reaching success; those united in purpose grow stronger.

This honor is not only a recognition of our close collaboration in the past, but also the best testament to the tacit understanding and mutual trust between us.

2026 marks the fourth year of partnership between Oriental Semiconductor and MaiTian Energy.

Looking ahead, we will take this as a new chapter, and journey together with MaiTian Energy and all partners toward a bright future of industrial development！

**——About Oriental Semiconductor——**
Suzhou Oriental Semiconductor Co., Ltd. (Stock Code: 688261) is a technology-driven enterprise specializing in the R&D of high-performance power devices. Its products are widely used in photovoltaic energy storage, new energy vehicles, industrial control and other fields. The company is committed to promoting domestic substitution and the development of green energy through technological innovation.

**——About MaiTian Energy——**

MaiTian Energy is a high-tech enterprise specializing in the new energy sector, offering products including PV grid-tied inverters, energy storage inverters, energy storage battery systems, EV chargers and heat pumps, forming an all-in-one “solar + storage + charging + heating” integrated solution.

Since its founding, the company has focused on overseas markets, accurately seized the development opportunities of residential energy storage in Europe, and achieved rapid growth. At present, its business covers more than 70 countries and regions worldwide. It has established partnerships with numerous distributors, power companies and energy associations across Europe, Australia, South America, Africa and other regions, building a sound global sales network.