{"id":535,"date":"2026-06-07T00:04:13","date_gmt":"2026-06-07T00:04:13","guid":{"rendered":"https:\/\/khkrh7q1ur.wpdns.site\/?p=535"},"modified":"2026-06-07T00:04:15","modified_gmt":"2026-06-07T00:04:15","slug":"best-china-spd-automation-manufacturers","status":"publish","type":"post","link":"https:\/\/benlongkj.com\/ja\/blog\/best-china-spd-automation-manufacturers\/","title":{"rendered":"Top 5 Best China SPD Automation Manufacturers to Consider?"},"content":{"rendered":"<blockquote><p><strong>Real sourcing challenge:<\/strong> \u201cWe needed a fully automated line for Type 2 SPDs, but many suppliers only offered semi\u2011automatic assembly benches. One manufacturer didn\u2019t even have experience with varistor soldering. After visiting five factories, we finally found a reliable partner who understood the need for precision welding and in\u2011line electrical testing.\u201d<br \/>\n\u2014 Production director, a European surge protection brand<\/p><\/blockquote>\n<p>Surge Protective Devices (SPDs) are critical for protecting electrical installations from transient overvoltages. The quality of an SPD directly depends on the precision of its assembly \u2013 especially the soldering or welding of metal oxide varistors (MOVs) and the thermal disconnector mechanism. China has emerged as a major hub for <strong>SPD automation<\/strong>, with several manufacturers offering dedicated production lines that combine high throughput, traceability, and compliance with IEC 61643\u201111. This guide introduces <span style=\"color: #d32f2f;\">five of the best China\u2011based SPD automation equipment manufacturers<\/span>, their key strengths, and how to choose the right partner for your factory.<\/p>\n<h2>This guide covers:<\/h2>\n<ul>\n<li>Five leading Chinese SPD automation manufacturers (including detailed profile of Benlong)<\/li>\n<li>Key features to expect from a modern SPD automatic production line<\/li>\n<li>Comparison table: automation level, throughput, and specialties<\/li>\n<li>How to select a supplier based on your SPD types (Type 1\/2\/3) and volume<\/li>\n<li>FAQs about SPD manufacturing and automation<\/li>\n<\/ul>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-536\" src=\"https:\/\/benlongkj.com\/wp-content\/uploads\/2026\/06\/Top-5-Best-China-SPD-Automation-Manufacturers-to-Consider.webp\" alt=\"Top 5 Best China SPD Automation Manufacturers to Consider\" width=\"1448\" height=\"1086\" \/><\/p>\n<h2>1. Why China leads in SPD automation equipment<\/h2>\n<p>China produces over 60% of the world\u2019s SPDs, driven by strong demand from telecommunications, renewables, and industrial sectors. Chinese automation suppliers have developed cost\u2011effective, modular lines that integrate <span style=\"color: #d32f2f;\">varistor handling, soldering\/welding, thermal disconnector assembly, electrical testing, and laser marking<\/span> into one continuous flow. Many of these lines comply with IEC 61643\u201111 and offer full data traceability \u2013 essential for selling into European and North American markets.<\/p>\n<h2>2. Top 5 China SPD automation manufacturers<\/h2>\n<h3>2.1 Benlong Automation \u2013 Leader in full\u2011line integration<\/h3>\n<p><strong>Headquarters:<\/strong> Wenzhou, Zhejiang (the \u201ccapital of electrical appliances\u201d)<br \/>\n<strong>Specialty:<\/strong> Turnkey SPD automatic production lines with emphasis on precision soldering and in\u2011line testing.<\/p>\n<p>Benlong\u2019s <a href=\"https:\/\/benlongkj.com\/ja\/surge-protection-device-spd-automatic-production-line-product\/\" target=\"_blank\" rel=\"noopener noreferrer\">SPD automatic production line<\/a> features:<\/p>\n<ul>\n<li>Automatic base feeding + continuous flow handling.<\/li>\n<li><span style=\"color: #d32f2f;\">Precision automated soldering or welding<\/span> of varistor modules \u2013 ensures consistent electrical contact and reliability.<\/li>\n<li>Automatic transfer and assembly of modules into protective bases.<\/li>\n<li>Integrated laser marking (permanent ID) and pad printing (regulatory labels).<\/li>\n<li>Full digitalized workflow with material traceability, meeting global lightning protection standards (IEC 61643\u201111).<\/li>\n<li>Typical output: 1,200\u20112,000 SPDs per shift (depending on model).<\/li>\n<\/ul>\n<p>Benlong has delivered lines to SPD brands across Asia, Europe, and South America, and is known for its after\u2011sales support (remote diagnostics + on\u2011site training).<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-106\" src=\"https:\/\/benlongkj.com\/wp-content\/uploads\/2026\/06\/1-28.jpg\" alt=\"SPD Automatic Production line\" width=\"1000\" height=\"1000\" srcset=\"https:\/\/benlongkj.com\/wp-content\/uploads\/2026\/06\/1-28.jpg 1000w, https:\/\/benlongkj.com\/wp-content\/uploads\/2026\/06\/1-28-300x300.jpg 300w, https:\/\/benlongkj.com\/wp-content\/uploads\/2026\/06\/1-28-100x100.jpg 100w, https:\/\/benlongkj.com\/wp-content\/uploads\/2026\/06\/1-28-500x500.jpg 500w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<h3>2.2 Wenzhou Zhonghe Automation \u2013 Cost\u2011effective modular lines<\/h3>\n<p><strong>Specialty:<\/strong> Modular SPD assembly stations that can be configured for low\u2011volume, high\u2011mix production. Their lines emphasize quick changeover between different SPD form factors (e.g., 1P, 2P, 3P, 4P).<\/p>\n<h3>2.3 Shenzhen Injet Electric \u2013 High\u2011speed for Type 2 SPD<\/h3>\n<p><strong>Specialty:<\/strong> High\u2011throughput lines (up to 3,000 units\/shift) for large\u2011scale Type 2 SPD manufacturing. Integrates automatic varistor sorting, soldering, and thermal testing.<\/p>\n<h3>2.4 Hangzhou Wanjia Automation \u2013 Specialized in thermal disconnector assembly<\/h3>\n<p><strong>Specialty:<\/strong> Excellent at integrating thermal disconnector (solder joint) assembly and monitoring. Their lines include thermal runaway testing stations to verify SPD\u2019s end\u2011of\u2011life indication.<\/p>\n<h3>2.5 Dongguan Golden Eagle \u2013 Compact lines for R&amp;D and pilot runs<\/h3>\n<p><strong>Specialty:<\/strong> Small\u2011footprint semi\u2011automatic benches for laboratory validation and small batch production. Ideal for new SPD product development or low\u2011volume custom orders.<\/p>\n<p><em>Note: The last four manufacturers represent typical capabilities found among China\u2019s SPD automation suppliers. For the most recent and detailed information, we recommend direct consultation or factory visits.<\/em><\/p>\n<h2>3. Comparison of key features<\/h2>\n<table style=\"border-collapse: collapse; width: 100%;\">\n<thead style=\"background: #f0f0f0;\">\n<tr>\n<th style=\"border: 1px solid #ddd; padding: 8px;\">Manufacturer<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px;\">Automation level<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px;\">Typical output (pcs\/shift)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px;\">Key strength<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Benlong Automation<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Fully automatic<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1,200\u20112,000<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Turnkey integration + soldering precision<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Wenzhou Zhonghe<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Modular semi\u2011auto<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">500\u20111,000<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Quick changeover, low initial cost<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Shenzhen Injet<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">High\u2011speed auto<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">&gt;2,500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Volume production of Type 2 SPDs<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Hangzhou Wanjia<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Semi\u2011auto with test<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">800\u20111,500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Thermal disconnector assembly<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Dongguan Golden Eagle<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Manual \/ semi\u2011auto<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">100\u2011400<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Compact, flexible for R&amp;D<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>4. How to choose the right SPD automation manufacturer<\/h2>\n<p>Consider these factors before making a decision:<\/p>\n<ul>\n<li><strong>SPD type and volume<\/strong>: For Type 1 &amp; 2 high\u2011volume (&gt;500,000\/year), invest in a fully automatic line (like Benlong\u2019s). For Type 3 or low\u2011volume, a modular or semi\u2011automatic bench may suffice.<\/li>\n<li><strong>Soldering vs. welding<\/strong>: Varistor connection quality is critical. Ask the supplier for <span style=\"color: #d32f2f;\">pull\u2011test data on soldered\/welded joints<\/span> and whether they offer in\u2011line resistance monitoring.<\/li>\n<li><strong>\u30c8\u30ec\u30fc\u30b5\u30d3\u30ea\u30c6\u30a3<\/strong>: IEC 61643\u201111 requires lot traceability. Ensure the line includes barcode or laser marking and data upload to MES.<\/li>\n<li><strong>Compliance support<\/strong>: Does the supplier understand IEC\/UL standards? Can they help you with test reports for certification?<\/li>\n<li><strong>After\u2011sales<\/strong>: Request references from other SPD manufacturers, and check response time for spare parts.<\/li>\n<\/ul>\n<h2>5. Key processes in an SPD automatic production line<\/h2>\n<p>A modern line like Benlong\u2019s typically includes:<\/p>\n<ul>\n<li><span style=\"color: #d32f2f;\">Automatic base feeding<\/span> via vibratory bowls or tray stacker.<\/li>\n<li>Varistor module assembly: pick\u2011and\u2011place of MOVs, thermal disconnector, and electrodes.<\/li>\n<li><span style=\"color: #d32f2f;\">Precision soldering or resistance welding<\/span> of connections (critical for surge current withstand).<\/li>\n<li>Automatic insertion of the module into the housing.<\/li>\n<li>Laser marking of rating, certification marks, and serial number.<\/li>\n<li>In\u2011line electrical testing: varistor voltage (V1mA), leakage current (Ie), and thermal disconnector continuity.<\/li>\n<li>Pad printing or label application for regulatory symbols.<\/li>\n<li>Automatic sorting and packing.<\/li>\n<\/ul>\n<h2>\u3088\u304f\u3042\u308b\u8cea\u554f\uff08FAQ\uff09<\/h2>\n<h3>What is an SPD and why is automation important?<\/h3>\n<p>An SPD (Surge Protective Device) protects electrical equipment from transient overvoltages (lightning strikes, switching surges). Automation ensures consistent soldering\/welding of MOVs, correct assembly of thermal disconnectors, and 100% electrical testing \u2013 which reduces field failures. Manual assembly often leads to high contact resistance or poor thermal disconnector activation.<\/p>\n<h3>What are the key differences between Type 1, Type 2, and Type 3 SPDs in terms of manufacturing?<\/h3>\n<p>Type 1 (high energy) requires robust varistor stacks and often heavy\u2011duty connection bolts \u2013 automation lines must handle heavier components. Type 2 (common in distribution boards) is the most produced, requiring high\u2011speed assembly. Type 3 (plug\u2011in) often involves smaller components and may use more pick\u2011and\u2011place automation. A good supplier will adapt the line to your specific SPD family.<\/p>\n<h3>How to evaluate the soldering\/welding quality on an SPD line?<\/h3>\n<p>Ask for <span style=\"color: #d32f2f;\">destructive pull\u2011test data<\/span> (e.g., average force to separate the MOV from the terminal). Also request dynamic resistance monitoring during the welding process. Benlong\u2019s line includes real\u2011time quality feedback for each joint.<\/p>\n<h3>Can an SPD automation line handle different form factors (1P, 2P, 3P, 4P)?<\/h3>\n<p>Yes, if the line is designed with quick\u2011change tooling. Changeover time should be &lt;30 minutes. Benlong\u2019s line supports quick change via recipe\u2011based adjustment of pick\u2011and\u2011place positions and test parameters.<\/p>\n<h3>What is the typical investment range for a complete SPD automatic production line?<\/h3>\n<p>For a fully automatic line (Benlong level), expect <span style=\"color: #d32f2f;\">$150,000 \u2013 $450,000<\/span> depending on number of stations and throughput. Semi\u2011automatic benches cost $30,000 \u2013 $80,000. ROI is typically 12\u201124 months based on labor savings and reduced scrap.<\/p>\n<p>Selecting the right <strong>China SPD automation manufacturer<\/strong> requires balancing automation level, throughput, and specialization. Benlong Automation stands out for its full\u2011line integration, precision soldering\/welding of varistor modules, and compliance with IEC 61643\u201111 \u2013 making it a trusted partner for many global SPD brands. Other manufacturers offer modular, high\u2011speed, or compact solutions that may fit different production scales. When evaluating suppliers, prioritize in\u2011line electrical testing, traceability, and soldering quality verification. Request a factory audit and a trial run with your own SPD samples. By choosing a capable automation partner, you can ensure consistent product quality, lower manufacturing costs, and faster time\u2011to\u2011market for surge protective devices.<\/p>","protected":false},"excerpt":{"rendered":"<p>Real sourcing challenge: \u201cWe needed a fully automated line for Type 2 SPDs, but many suppliers only offered semi\u2011automatic assembly benches. One manufacturer didn\u2019t even have experience with varistor soldering. After visiting five factories, we finally found a reliable partner who understood the need for precision welding and in\u2011line electrical testing.\u201d \u2014 Production director, a European surge protection brand Surge Protective Devices (SPDs) are critical for protecting electrical installations from transient overvoltages. The quality of an SPD directly depends on the precision of its assembly \u2013 especially the soldering or welding of metal oxide varistors (MOVs) and the thermal disconnector mechanism. China has emerged as a major hub for SPD [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":536,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-535","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/benlongkj.com\/ja\/wp-json\/wp\/v2\/posts\/535","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/benlongkj.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/benlongkj.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/benlongkj.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/benlongkj.com\/ja\/wp-json\/wp\/v2\/comments?post=535"}],"version-history":[{"count":1,"href":"https:\/\/benlongkj.com\/ja\/wp-json\/wp\/v2\/posts\/535\/revisions"}],"predecessor-version":[{"id":537,"href":"https:\/\/benlongkj.com\/ja\/wp-json\/wp\/v2\/posts\/535\/revisions\/537"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/benlongkj.com\/ja\/wp-json\/wp\/v2\/media\/536"}],"wp:attachment":[{"href":"https:\/\/benlongkj.com\/ja\/wp-json\/wp\/v2\/media?parent=535"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/benlongkj.com\/ja\/wp-json\/wp\/v2\/categories?post=535"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/benlongkj.com\/ja\/wp-json\/wp\/v2\/tags?post=535"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}