High-performance T2 Surge Protective Devices for Medium to Ultra-High Voltage Systems
In the rapidly evolving landscape of global electrical infrastructure, the SPD 20-40kA Surge Protective Device has emerged as the definitive standard for secondary protection. As industrial ecosystems transition toward "Industry 4.0," the sensitivity of electronic components in automated production lines, IoT sensors, and renewable energy inverters has reached an all-time high. A single transient overvoltage—whether caused by lightning strikes or internal switching operations—can lead to catastrophic downtime and hardware failure.
Zhejiang Shuorui Electric Co., Ltd., positioned at the heart of China’s electrical capital in Liushi, Wenzhou, addresses these challenges through advanced R&D. Our 20-40kA series (nominal discharge current In: 20kA, maximum discharge current Imax: 40kA) provides a robust thermal disconnection mechanism and rapid response time (<25ns), ensuring that your critical infrastructure remains resilient against the most volatile electrical disturbances.
Zhejiang Shuorui Electric Co., Ltd. is located in Liushi, Wenzhou, Zhejiang, the electrical capital of China. It is the core area of the electrical industry and gathers many excellent electrical companies and rich industry resources. As a modern company integrating R&D, production and sales, Shuorui Electric is committed to providing customers with high-quality electrical products and solutions.
The company always adheres to the business philosophy of "the most cutting-edge technology, the best quality, the most sincere service, and the most favorable price", striving to maintain a leading position in the fierce market competition.
In order to achieve this goal, Shuorui Electric has continuously increased its investment in technology research and development, established a high-quality R&D team, focused on the development of new products and technological innovation, and ensured that the company is always at the forefront of the industry.
Leading the shift towards sustainable, smart, and resilient power distribution
With the global surge in Photovoltaic (PV) installations and Electric Vehicle (EV) charging infrastructure, the demand for DC-specific surge protection has skyrocketed. Traditional AC SPDs are insufficient for the unique quenching requirements of DC arcs. Our 1000VDC and 1500VDC 20-40kA SPDs are specifically engineered with specialized MOV (Metal Oxide Varistor) technology to handle these demands.
Operating out of Wenzhou, Shuorui Electric leverages Supply Chain 4.0 principles. By integrating localized component manufacturing with automated assembly lines, we offer unparalleled supply chain resilience. This ensures that global procurement officers receive consistent quality with reduced lead times, even during global logistics fluctuations.
Modern factories are no longer just consumers of power; they are producers. The bidirectional flow of energy in smart grids requires SPDs that can handle high-frequency transients. Our T2 series is designed for 100% duty cycle reliability, supporting the global transition toward net-zero industrial operations.
Why Tier-1 Engineers Choose Shuorui
In the production process, Shuorui Electric strictly controls every link, from the purchase of parts to the delivery of the whole machine, and has established strict quality inspection standards. The company has introduced advanced production equipment and technology to ensure that every product can meet international standards.
Each product produced by the company is carefully designed, with a novel and beautiful appearance, in line with modern aesthetics, and high efficiency and reliability in function. We offer full customization for global brands, ensuring compliance with local grid codes.
Our goal is to satisfy every customer and reassure every user. We maintain rigorous certifications across our entire product line, ensuring that our 20-40kA SPDs meet CE, TUV, and other international safety benchmarks.
Versatile Protection Across Every Major Industry
DC 1000V/1500V systems are highly susceptible to lightning. Our 3P T2 40kA SPDs provide the necessary safety buffer for string inverters and combiner boxes, ensuring continuous power generation.
Data is the new oil, and downtime is expensive. Our 2P 275V AC SPDs protect sensitive servers and UPS systems from grid switching transients and atmospheric discharges.
With the rise of smart home tech, residential electrical panels now require industrial-grade protection. Our 2P 230V MCBs and SPDs offer compact, reliable safety for the modern household.
Transparency and Excellence in Action
Expert insights into Surge Protection and Selection
In (Nominal Discharge Current) is the peak current value (8/20µs waveform) that the SPD can withstand 15 times while remaining functional. Imax (Maximum Discharge Current) is the ultimate peak current the device can safely divert once without failing. A 20-40kA rating means it is extremely durable for standard duty and highly protective against extreme events.
PV systems involve long DC cable runs which act as antennas for electromagnetic interference from nearby lightning strikes. A Type 2 (T2) SPD is specifically designed to protect the inverter's DC input and AC output from these induced overvoltages.
Yes. As a leading China SPD supplier, we offer OEM and ODM services. We can customize voltage ratings (from 150VDC to 1500VDC), pole configurations (1P, 2P, 3P, 4P), and branding for international distributors.
Our SPDs feature a visual status window (Green = OK, Red = Replace). They should be checked after major storms or as part of annual electrical maintenance. The modular design of our 20-40kA series allows for easy cartridge replacement without rewiring.
End-to-end electrical protection for any scale
Looking to the future, Zhejiang Shuorui Electric Co., Ltd. will continue to increase investment in research and development, promote technological innovation, and expand product lines to create a better future together.
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