10 Leading DC SPD Suppliers in China 2025

Introduction to DC SPD

DC SPD (Direct Current Surge Protective Device) is a crucial component in electrical systems, especially those operating on direct current. It is designed to protect electrical equipment from the damage caused by transient over - voltages, such as lightning strikes or sudden changes in electrical load. In DC systems, which are widely used in solar power plants, telecommunications, electric vehicles, and other fields, the stability and reliability of DC SPDs are of great significance. A high - quality DC SPD can effectively divert excessive current and limit the voltage to a safe level, thereby ensuring the normal operation of DC - powered equipment and reducing the risk of equipment failure and downtime.

10 Leading DC SPD Suppliers in China

Guiyang High - Tech Yige Electronic Co., Ltd

Guiyang High - Tech Yige Electronic Co., Ltd is a well - established enterprise in the field of electrical protection. The company is committed to the research, development, production, and sales of various electrical protection products, with DC SPDs being one of its core offerings.

Features in DC SPD:

• High - performance materials: The company uses high - quality varistors and other key components in its DC SPDs. These materials have excellent non - linear characteristics, which can quickly respond to over - voltage situations and effectively absorb and dissipate surge energy.
• Precise voltage clamping: Their DC SPDs can accurately clamp the voltage within a safe range. This is crucial for protecting sensitive DC equipment, as even a small over - voltage can cause damage to electronic components.
• Multiple protection levels: To meet the different protection requirements of various DC systems, the company offers DC SPDs with multiple protection levels. Whether it is a low - voltage DC system in a small - scale solar power station or a high - voltage DC system in a large - scale data center, there is a suitable product.

Advantages:

• Technical innovation: The company has a strong R & D team that continuously conducts technological innovation. They are constantly exploring new materials and manufacturing processes to improve the performance and reliability of their DC SPDs.
• Quality control: With a strict quality control system, every DC SPD product undergoes multiple inspections during the production process. This ensures that the products meet international and domestic quality standards, providing customers with high - quality and reliable protection.
• Customer service: The company provides comprehensive customer service, including pre - sales consultation, in - sales support, and after - sales maintenance. They can help customers select the most suitable DC SPD products according to their specific needs and provide timely technical support.Website: https://www.flyboatmov.com/

Beijing Sifang Automation Co., Ltd

Beijing Sifang Automation Co., Ltd is a leading enterprise in the field of power automation and protection. Founded in 1994, it has rich experience in the power industry.

Features in DC SPD:

• System - level integration: The company's DC SPDs are designed to be highly integrated with power systems. They can work in harmony with other power equipment, such as inverters, batteries, and monitoring systems in solar power plants. This integration helps to optimize the overall performance of the power system and enhance its anti - surge ability.
• Intelligent monitoring: Their DC SPDs are equipped with intelligent monitoring functions. They can continuously monitor the operating status of the SPD, such as leakage current, residual voltage, and the number of surge impacts. This real - time monitoring data can be transmitted to the control center, allowing for timely detection of potential problems and preventive maintenance.
• High - temperature resistance: In some harsh environments, such as deserts where solar power plants are often located, the temperature can be extremely high. Beijing Sifang's DC SPDs are designed to have excellent high - temperature resistance, ensuring stable performance even in high - temperature conditions.

Advantages:

• Industry reputation: The company has a good reputation in the power industry. Their products are widely recognized for their high quality and reliability, which gives customers confidence in choosing their DC SPDs.
• Comprehensive R & D capabilities: With a large - scale R & D center, Beijing Sifang can conduct in - depth research on power technology and protection. This enables them to continuously develop new and improved DC SPD products to meet the evolving needs of the market.
• Global market presence: The company has expanded its business to the global market. Its products are exported to many countries and regions, which means that they have to meet international standards and customer requirements, further enhancing the competitiveness of their DC SPDs.

Shanghai Electric Power Co., Ltd

Shanghai Electric Power Co., Ltd is a large - scale state - owned power enterprise with a long history and strong strength.

Features in DC SPD:

• Large - capacity surge handling: The company's DC SPDs are capable of handling large - capacity surges. In high - power DC systems, such as large - scale industrial DC power supplies and high - voltage DC transmission lines, their SPDs can quickly and effectively divert large amounts of surge current, protecting the equipment from damage.
• Low residual voltage: They focus on minimizing the residual voltage of their DC SPDs during surge protection. A lower residual voltage means less stress on the protected equipment, which can extend the service life of the equipment and improve its reliability.
• Modular design: The DC SPDs of Shanghai Electric Power are designed in a modular way. This makes it easy for installation, maintenance, and replacement. In a large - scale power system, modular design can significantly reduce the downtime during equipment maintenance and upgrade.

Advantages:

• Abundant resources: As a large - scale power enterprise, Shanghai Electric Power has access to abundant resources, including financial resources, human resources, and material resources. This allows them to invest heavily in the research and development and production of high - quality DC SPDs.
• Strong technical support: The company has a large number of technical experts and engineers in the power field. They can provide strong technical support for the development and application of DC SPDs, ensuring the technical superiority of the products.
• Good cooperation with the power grid: Shanghai Electric Power has a close cooperation relationship with the power grid. This enables them to better understand the actual needs of the power grid for DC SPDs and develop products that are more in line with the requirements of the power grid operation.

Shenzhen Inovance Technology Co., Ltd

Shenzhen Inovance Technology Co., Ltd is a well - known high - tech enterprise focusing on industrial automation and new energy.

Features in DC SPD:

• Application - specific design: The company designs its DC SPDs according to different application scenarios. For example, in the field of electric vehicles, their DC SPDs are specially designed to meet the harsh operating conditions of the vehicle's electrical system, such as high - speed charging and vibration resistance. In the solar energy field, they consider the characteristics of the photovoltaic system, such as the low - voltage and high - current operation mode.
• Fast response speed: The DC SPDs of Inovance Technology have a very fast response speed. They can respond to surge over - voltages within a few nanoseconds, which is crucial for protecting sensitive electronic components in modern DC systems.
• High - frequency protection: With the development of high - frequency power electronics in DC systems, their DC SPDs are also designed to have high - frequency protection capabilities. They can effectively suppress high - frequency interference and over - voltages, ensuring the stable operation of high - frequency DC equipment.

Advantages:

• Innovation - driven: Inovance Technology is an innovation - driven enterprise. They invest a large amount of funds in R & D every year, constantly exploring new technologies and materials for DC SPDs. This innovation ability enables them to keep up with the technological development trend of the industry and provide customers with more advanced products.
• Complete product line: The company has a complete product line of DC SPDs, covering different voltage levels and application scenarios. This allows customers to choose the most suitable product according to their specific needs, providing a one - stop shopping experience.
• Good brand image: Inovance Technology has established a good brand image in the market. Their products are well - known for their high - quality and reliable performance, which helps to expand the market share of their DC SPDs.

Xi'an XD Electric Co., Ltd

Xi'an XD Electric Co., Ltd is a leading enterprise in the field of power equipment manufacturing in China.

Features in DC SPD:

• High - voltage protection expertise: With its long - term experience in high - voltage power equipment, the company has strong expertise in high - voltage DC SPDs. Their products can provide reliable protection for high - voltage DC transmission systems, which are crucial for the long - distance and large - capacity power transmission.
• Advanced manufacturing technology: The company uses advanced manufacturing technology in the production of DC SPDs. For example, they use precision molding and surface treatment technology to ensure the high quality and stability of the products.
• Environmental adaptability: Xi'an XD Electric's DC SPDs are designed to have good environmental adaptability. They can operate normally in different environmental conditions, such as high - altitude, high - humidity, and low - temperature environments, which is very important for the power systems located in different geographical regions.

Advantages:

• Historical heritage: The company has a long - standing history in the power equipment manufacturing industry. This historical heritage gives them rich experience and technical accumulation, which is reflected in the high - quality and reliable performance of their DC SPD products.
• National support: As a key state - owned enterprise, Xi'an XD Electric receives strong support from the national government in terms of policy and R & D funds. This support helps them to continuously improve their product technology and competitiveness.
• International cooperation: The company actively conducts international cooperation, introducing advanced foreign technologies and management experience. This international cooperation helps to improve the overall level of their DC SPD products and expand their international market share.

NARI Technology Co., Ltd

NARI Technology Co., Ltd is a well - known high - tech enterprise in the power automation and protection field.

Features in DC SPD:

• Smart grid compatibility: The company's DC SPDs are designed to be compatible with the smart grid. They can communicate with other smart grid devices, such as smart meters and distribution automation systems, to achieve intelligent management and control of the power system.
• Fault diagnosis function: Their DC SPDs are equipped with a fault diagnosis function. They can automatically detect and diagnose faults in the SPD itself, such as component failure and insulation degradation. This early fault diagnosis helps to prevent potential failures and ensure the reliable operation of the power system.
• Energy - saving design: NARI Technology pays attention to energy - saving design in its DC SPDs. By optimizing the circuit structure and using low - loss materials, their products can reduce energy consumption during normal operation, which is in line with the current trend of energy conservation and environmental protection.

Advantages:

• Strong R & D strength: The company has a large - scale R & D team with a high level of technical expertise. They are constantly engaged in research on new technologies and products, which enables them to develop advanced DC SPDs with high performance and reliability.
• Industry standards participation: NARI Technology actively participates in the formulation of industry standards for power protection products. This allows them to keep up with the latest industry trends and ensure that their products meet the highest standards in the industry.
• Wide application cases: Their DC SPDs have been widely applied in various power systems across the country. These rich application cases provide valuable experience for product improvement and optimization, and also enhance the credibility of their products in the market.

Changshu Switchgear Manufacturing Co., Ltd

Changshu Switchgear Manufacturing Co., Ltd is a professional manufacturer of electrical equipment with a long - standing history.

Features in DC SPD:

• Reliable mechanical structure: The company's DC SPDs have a reliable mechanical structure. They are designed to withstand mechanical vibrations, shocks, and impacts during transportation and installation. This ensures the stability and durability of the products in different working environments.
• Easy installation and maintenance: Their DC SPDs are designed with user - friendly installation and maintenance in mind. The products are equipped with clear installation instructions and easy - to - operate interfaces, which can significantly reduce the installation and maintenance time and cost for users.
• Cost - effectiveness: Changshu Switchgear focuses on providing cost - effective DC SPD products. They achieve this through efficient production management and optimized material selection, making their products more competitive in the market in terms of price - performance ratio.

Advantages:

• Production scale advantage: The company has a large - scale production base, which enables them to achieve economies of scale in production. This not only reduces the production cost but also ensures the timely supply of products to meet the market demand.
• Quality management system: Changshu Switchgear has a strict quality management system. From raw material procurement to product delivery, every link is strictly controlled to ensure the high quality of the DC SPD products.
• After - sales service network: The company has established a wide - spread after - sales service network. They can provide timely on - site service and technical support to customers, which is very important for maintaining good customer relationships and ensuring the long - term operation of the products.

Zhejiang Tengen Electric Co., Ltd

Zhejiang Tengen Electric Co., Ltd is a leading enterprise in the field of electrical protection equipment.

Features in DC SPD:

• Customized solutions: The company can provide customized DC SPD solutions according to the specific requirements of customers. They have a professional technical team that can design and develop products tailored to the unique needs of different industries and applications.
• High - quality surface treatment: The surface treatment of their DC SPDs is of high quality. It not only improves the appearance of the products but also enhances the corrosion resistance and weather resistance of the products, especially suitable for outdoor applications.
• Low leakage current: Zhejiang Tengen's DC SPDs are designed to have low leakage current. This is important for the long - term operation of the DC system, as excessive leakage current can cause energy waste and potential safety hazards.

Advantages:

• Flexible production model: The company's flexible production model allows them to quickly respond to customer orders and changes in market demand. They can adjust the production process and product specifications in a timely manner to meet the diverse needs of customers.
• Product innovation: Zhejiang Tengen attaches great importance to product innovation. They continuously invest in R & D to develop new types of DC SPDs with better performance and functionality, which helps them to stay ahead in the market competition.
• Good customer feedback: The company has received good customer feedback due to its high - quality products and excellent service. This positive word - of - mouth helps to expand their market share and build a good brand image.

ABB (China) Ltd

ABB is a global leader in power and automation technologies, and its branch in China also plays an important role in the DC SPD market.

Features in DC SPD:

• Global technology integration: ABB (China) Ltd integrates global advanced technologies into its DC SPD products. They draw on the R & D experience and technological achievements of ABB's global R & D centers, ensuring that their products are at the international leading level.
• Comprehensive product portfolio: The company offers a comprehensive portfolio of DC SPD products, including different types and specifications for various applications. Whether it is a small - scale DC system in a household or a large - scale industrial DC system, ABB can provide suitable products.
• System - level protection concept: ABB promotes a system - level protection concept in its DC SPD products. They consider the overall protection requirements of the DC system, including the interaction between different components and the impact of the external environment, to provide more comprehensive and effective protection.

Advantages:

• Global brand influence: ABB is a well - known global brand with high brand recognition and reputation. Customers in China and around the world trust ABB's products for their high quality and reliability.
• Extensive R & D resources: The company has extensive R & D resources globally. They can invest a large amount of funds in R & D to continuously improve the performance and functionality of their DC SPD products.
• International service standard: ABB (China) Ltd provides service in line with international standards. They have a professional after - sales service team that can provide timely and high - quality service to customers, ensuring the long - term stable operation of the products.

Schneider Electric (China) Co., Ltd

Schneider Electric is a global specialist in energy management and automation, and its China branch is also very active in the DC SPD market.

Features in DC SPD:

• Energy - efficient design: The company's DC SPDs are designed with energy - efficient features. They use advanced semiconductor materials and circuit design to reduce energy consumption during normal operation and improve the overall energy efficiency of the DC system.
• Safety - first principle: Schneider Electric adheres to the safety - first principle in the design and production of DC SPDs. Their products are equipped with multiple safety protection mechanisms, such as over - current protection, over - voltage protection, and short - circuit protection, to ensure the safety of the DC system and the protected equipment.
• Digital management support: Their DC SPDs support digital management. They can be connected to the digital management platform of Schneider Electric, allowing users to remotely monitor and control the operation of the SPDs, which improves the convenience and intelligence of the system management.

Advantages:

• Global experience sharing: Schneider Electric (China) Ltd can share the global experience of the company. They can learn from the successful application cases in different countries and regions, and apply these experiences to the Chinese market, providing more suitable solutions for Chinese customers.
• Strong brand awareness: Schneider Electric is a well - recognized brand in the energy management and automation field. Its high brand awareness gives customers more confidence in choosing their DC SPD products.
• Comprehensive service system: The company has a comprehensive service system, including pre - sales consultation, in - sales support, and after - sales maintenance. They can provide customers with all - around service throughout the product life cycle, ensuring the smooth operation of the DC system.

Summary

The above 10 enterprises are the leading DC SPD suppliers in China in 2025. Each of them has its own unique features and advantages. Guiyang High - Tech Yige Electronic Co., Ltd stands out with its technical innovation and high - quality customer service. Beijing Sifang Automation Co., Ltd is strong in system - level integration and intelligent monitoring. Shanghai Electric Power Co., Ltd has the ability to handle large - capacity surges. Shenzhen Inovance Technology Co., Ltd focuses on application - specific design. Xi'an XD Electric Co., Ltd has expertise in high - voltage protection. NARI Technology Co., Ltd emphasizes smart grid compatibility. Changshu Switchgear Manufacturing Co., Ltd offers reliable mechanical structures and cost - effectiveness. Zhejiang Tengen Electric Co., Ltd provides customized solutions. ABB (China) Ltd integrates global technology. Schneider Electric (China) Co., Ltd adheres to energy - efficient and safety - first principles.

These enterprises, through their continuous efforts in R & D, production, and service, contribute to the development and improvement of the DC SPD market in China. They also play an important role in promoting the stability and reliability of DC - powered systems in various industries, such as solar energy, telecommunications, and electric vehicles. With the continuous development of the power industry and the increasing demand for electrical protection, these leading suppliers are expected to continue to innovate and provide better - quality DC SPD products and services in the future.