——On the Occasion of the Official Release of the National Standard GB/T 18802.331-2024 for Varistors
"To scale a ten-thousand-foot mountain, one takes but a single step at a time." Over the past decades, every technological breakthrough, every process upgrade, and every standard formulation in China's varistor sector— a core component for surge protection—has embodied the steady efforts of countless pioneers.
The technology and manufacturing of varistors in China have achieved leapfrog development, evolving from non-existence to maturity and from weakness to strength. This remarkable achievement would not have been possible without the wisdom, hard work, and lifelong dedication of generations of industry experts and predecessors. We pay tribute to these pioneering forerunners!
Looking back at the formulation of the national standard GB/T 18802.331-2024 for varistors, it represents the collective wisdom of numerous industry seniors and technical authorities, including Fei Zihao, Zhang Nanfa, Zhou Qibin, Huang Yong, Tian Enwen, Chen Jingliang, Chen Huizhen, Yao Xueling, Ye Linlong, and Zeng Qinglong. For decades, they have made continuous breakthroughs in material formulas, process optimization, and reliability testing, laying a solid foundation for the domestic substitution, industrial application, cost reduction, and efficiency improvement of China's varistors. Through years of persistence and exploration, they overcame core challenges in material formulas under simple experimental conditions, enabling the performance of domestic Metal Oxide Varistors (MOVs) to match that of international brands. They established a scientific framework for testing systems, laying the groundwork for industry quality control, and fostered an echelon of industry talents to ensure the inheritance of accumulated technical expertise.
The memory of China's early reliance on imported varistor technology remains vivid. As those engaged in the varistor industry, we must always remember this history, and more importantly, the outstanding contributions of generations of industry experts. They pioneered the innovation model integrating industry, academia, and research, and set industry benchmarks with their rigorous academic attitude. It is precisely their commitment to "sitting through years of painstaking research" that has led to the vigorous development of China's varistor industry and technology today, enabling the industry to achieve leapfrog progress—from following international trends to keeping pace, and finally taking the lead.
The arduous journey of industry experts and predecessors—from laboratories to production lines, and from university research to industrial application—remains fresh in our minds. Today, domestic MOVs have been widely used in power, communications, new energy, automotive, and other fields, and have transitioned from being followers to leaders: Chinese enterprises have gradually surpassed international competitors in key indicators such as high energy density, low residual voltage, and long service life; and from being standard implementers to standard setters: the release of GB/T 18802.331-2024 marks the further enhancement of China's varistor technology authority in the international standard system.
As the saying goes, "One generation plants the trees, and another enjoys the shade." As a rising star in the industry, Ruilongyuan Electronics humbly takes on the mission of inheriting the original aspiration of the varistor industry. We always remember the lifelong contributions of expert predecessors, will actively participate in the discussion, drafting, and formulation of new industry standards, and continue this glorious and great cause with the firm philosophy of prioritizing manufacturing and pursuing technological innovation.
We who work in the varistor industry are well aware that standardization is not only a sign of industrial maturity but also a catalyst for technological upgrading. For years, countless expert predecessors have devoted themselves to innovative breakthroughs in four key areas of MOVs, working tirelessly day and night.
First, continuous innovation in materials. Optimizing formulas to improve the consistency of varistor voltage; developing new doping technologies through experiments to enhance resistance to high-current impacts; exploring the replacement of silver paste with copper electrodes to reduce the manufacturing cost of varistor chips.
Second, continuous improvement and upgrading of production processes. Adopting precision tape casting technology to enhance product uniformity; introducing AI-enabled intelligent sintering control to optimize microstructures; promoting the upgrading of automated production equipment to improve the first-pass yield rate.
Third, emphasizing the integration of industry, academia, and research. Collaborating with university teams to focus on basic research, achieving new breakthroughs in the micro-mechanisms of materials; strictly controlling quality in the testing process to establish a more scientific evaluation system; optimizing the process flow of manufacturing enterprises to drive the continuous improvement of industrialization levels.
Fourth, continuous revision and iteration of new national standards to standardize and guide industry standards. Industry standards or national standards are not merely technical documents but the crystallization of industry consensus. For instance, through this standard revision: Temporary Overvoltage (TOV) withstand testing for varistors is added for the first time; an innovative composite stress aging evaluation system is proposed; and special requirements for new energy scenarios are refined.
"Those who walk alone may move fast, but those who walk together will go far." It is precisely because generations of varistor practitioners have worked in unity and overcome hardships—through close collaboration in technological innovation, process upgrading, standard iteration, and the integration of industry, academia, research, and application, while uniting upstream and downstream enterprises to build a full-chain standard system covering "testing-certification-application"—that China's varistor manufacturing and technology have gradually gained more say on the international stage, step by step.
As a new force in China's varistor manufacturing sector, Ruilongyuan Electronics will actively participate in the drafting and promotion of the new national standard, contribute its practical experience in key performance indicators and testing methods, and make dedicated efforts to the development and growth of the industry.
With the accelerated domestic substitution of protection components and the continuous growth of surge protection demand, Chinese varistor enterprises are facing new opportunities and challenges. In fields such as communication base stations, photovoltaic energy storage, and smart grids, domestic MOVs are gradually replacing foreign brands; by aligning with international standards, GB/T 18802.331-2024 coordinates with IEC standards to help Chinese enterprises expand into overseas markets; with continuous technological breakthroughs, high-voltage and low-residual-voltage MOVs will become a new industry focus in the next 3-5 years.
Against the backdrop of the global accelerated transition to green energy, we in the varistor industry are presented with a pressing sense of urgency and great potential for achievement. In the field of photovoltaic energy storage, we will develop more weather-resistant protection solutions; for smart grids, we will create protection components with faster response speeds; and we will expand into high-reliability product lines for automotive electronics. This requires us to inherit the craftsman spirit of striving for excellence from our predecessors, uphold an open and shared collaboration concept, adhere to the professional ethics of prioritizing quality, and continue to strive for the global rise of domestic varistors.
"The vision of China's varistor industry is not only to be a participant in manufacturing and the market, a leader in technology and application, but also to become a standard setter and value creator—our endeavor is not yet complete, and we must continue our efforts." Today, as latecomers to the industry, while taking over the fruitful achievements and bright prospects of the industry, the earnest advice and encouragement from our predecessors always linger in our ears, inspiring us and boosting our confidence.
"The road ahead is long and arduous, but I will strive to explore it with unwavering determination." — Ruilongyuan Electronics will uphold the original mission of our predecessors, actively embrace this industry trend, and work hand in hand with industry partners such as Guiyang Gaoxin Yige, Xi'an High Voltage Apparatus Research Institute, Tsinghua University, and Shanghai University. Together, we will promote the high-quality development of the varistor manufacturing industry, continuously enhance the competitiveness of industry products, and help China's surge protection component industry set sail and march toward the world.
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