{"id":2684,"date":"2025-08-20T11:08:09","date_gmt":"2025-08-20T03:08:09","guid":{"rendered":"https:\/\/www.cnhaitan.net\/?p=2684"},"modified":"2025-08-20T11:09:04","modified_gmt":"2025-08-20T03:09:04","slug":"what-is-smc-busbar-support","status":"publish","type":"post","link":"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support","title":{"rendered":"What is SMC Busbar Support?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#1_Introduction\" >1. Introduction<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#2_Why_is_SMC_Material_Used_for_Busbar_Support\" >2. Why is SMC Material Used for Busbar Support?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#21_What_is_SMC\" >2.1 What is SMC?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#22_Characteristics_of_SMC_Materials\" >2.2 Characteristics of SMC Materials<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#3_What_are_the_Advantages_of_SMC_Busbar_Supports\" >3. What are the Advantages of SMC Busbar Supports?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#31_Lightweight_Yet_Durable_Design\" >3.1 Lightweight Yet Durable Design<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#32_High_Mechanical_Strength\" >3.2 High Mechanical Strength<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#33_Excellent_Insulation\" >3.3 Excellent Insulation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#34_Thermal_Flame_Resistance\" >3.4 Thermal &amp; Flame Resistance<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#35_Environmental_Resistance\" >3.5 Environmental Resistance<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#36_Customization_Flexibility\" >3.6 Customization Flexibility<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#4_Applications_of_SMC_Busbar_Supports\" >4. Applications of SMC Busbar Supports<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#5_SMC_vs_Other_Busbar_Support_Materials\" >5. SMC vs Other Busbar Support Materials<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#51_SMC_Busbar_Support_vs_Porcelain_Busbar_Support\" >5.1 SMC Busbar Support vs Porcelain Busbar Support<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#52_SMC_Busbar_Support_vs_Epoxy_Resin_Busbar_Support\" >5.2 SMC Busbar Support vs Epoxy Resin Busbar Support<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#53_SMC_Busbar_Support_vs_Nylon_Busbar_Support\" >5.3 SMC Busbar Support vs Nylon Busbar Support<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#54_Beyond_the_Mainstream_Other_Alternatives\" >5.4 Beyond the Mainstream: Other Alternatives<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#55_Comparative_Overview\" >5.5 Comparative Overview<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#56_Key_Decision_Factors\" >5.6 Key Decision Factors<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#6_How_to_Choose_SMC_Busbar_Supports\" >6. How to Choose SMC Busbar Supports<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#61_System_Voltage\" >6.1 System Voltage<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#62_Mechanical_Load\" >6.2 Mechanical Load<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#63_Application_Environment\" >6.3 Application Environment<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#64_Standards_Compliance\" >6.4 Standards Compliance<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#65_Customization_Design_Flexibility\" >6.5 Customization &amp; Design Flexibility<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\/#7_Conclusion\" >7. Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h2 data-start=\"696\" data-end=\"716\"><span class=\"ez-toc-section\" id=\"1_Introduction\"><\/span>1. Introduction<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"717\" data-end=\"1211\">In modern electrical power distribution systems, <a href=\"https:\/\/www.cnhaitan.net\/en_za\/a-series-bmc-smc-busbar-insulator-support\/\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"766\" data-end=\"788\">SMC busbar support<\/strong><\/a> has become a critical component for ensuring both mechanical stability and electrical insulation. SMC busbar supports are designed to fix and insulate busbars, which are copper or aluminum conductors that carry large currents. You&#8217;ll find these bus bar supports in critical locations like switchgear, panel boards, substations, and renewable energy installations. Unlike traditional porcelain or metal insulators, SMC supports offer a unique combination of durability, electrical safety, and design flexibility, making them a modern and reliable choice for a wide range of applications.<\/p>\n<p data-start=\"1213\" data-end=\"1420\">By the end of this guide, you\u2019ll understand what SMC busbar supports are, why they are used, their advantages over other materials, and how to choose the right support busbar solution for your project.<\/p>\n<h2 data-start=\"1427\" data-end=\"1479\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-2685 size-medium\" title=\"SMC Busbar Support\" src=\"https:\/\/www.cnhaitan.net\/wp-content\/uploads\/2025\/08\/SMC-Busbar-Support--300x300.webp\" alt=\"China SMC Busbar Support\" width=\"300\" height=\"300\" srcset=\"https:\/\/www.cnhaitan.net\/wp-content\/uploads\/2025\/08\/SMC-Busbar-Support--300x300.webp 300w, https:\/\/www.cnhaitan.net\/wp-content\/uploads\/2025\/08\/SMC-Busbar-Support--150x150.webp 150w, https:\/\/www.cnhaitan.net\/wp-content\/uploads\/2025\/08\/SMC-Busbar-Support-.webp 750w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/h2>\n<h2 data-start=\"1427\" data-end=\"1479\"><span class=\"ez-toc-section\" id=\"2_Why_is_SMC_Material_Used_for_Busbar_Support\"><\/span>2. Why is SMC Material Used for Busbar Support?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 data-start=\"1481\" data-end=\"1503\"><span class=\"ez-toc-section\" id=\"21_What_is_SMC\"><\/span>2.1 What is SMC?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"1504\" data-end=\"1645\">SMC stands for Sheet Moulding Compound, a thermoset composite material widely used in the electrical industry. It is manufactured from:<\/p>\n<ul data-start=\"1646\" data-end=\"1969\">\n<li data-start=\"1646\" data-end=\"1719\">\n<p data-start=\"1648\" data-end=\"1719\"><strong data-start=\"1648\" data-end=\"1664\">Resin matrix<\/strong>: Unsaturated polyester for high chemical resistance.<\/p>\n<\/li>\n<li data-start=\"1720\" data-end=\"1812\">\n<p data-start=\"1722\" data-end=\"1812\"><strong data-start=\"1722\" data-end=\"1739\">Reinforcement<\/strong>: Short glass fibers (15\u201330%) to improve tensile and flexural strength.<\/p>\n<\/li>\n<li data-start=\"1813\" data-end=\"1883\">\n<p data-start=\"1815\" data-end=\"1883\"><strong data-start=\"1815\" data-end=\"1826\">Fillers<\/strong>: Flame-retardant additives such as alumina trihydrate.<\/p>\n<\/li>\n<li data-start=\"1884\" data-end=\"1969\">\n<p data-start=\"1886\" data-end=\"1969\"><strong data-start=\"1886\" data-end=\"1912\">Stabilizers &amp; pigments<\/strong>: To improve thermal resistance and design flexibility.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1971\" data-end=\"2128\">SMC is produced via compression molding at 120\u2013160\u00b0C, resulting in a dense, void-free structure ideal for busbar supporting insulator applications.<\/p>\n<h3 data-start=\"2130\" data-end=\"2172\"><span class=\"ez-toc-section\" id=\"22_Characteristics_of_SMC_Materials\"><\/span>2.2 Characteristics of SMC Materials<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"2173\" data-end=\"2538\">\n<li data-start=\"2173\" data-end=\"2250\">\n<p data-start=\"2175\" data-end=\"2250\"><strong data-start=\"2175\" data-end=\"2198\">Dielectric strength<\/strong>: \u226512 kV\/mm (ASTM D149), ensuring safe insulation.<\/p>\n<\/li>\n<li data-start=\"2251\" data-end=\"2313\">\n<p data-start=\"2253\" data-end=\"2313\"><strong data-start=\"2253\" data-end=\"2274\">Thermal stability<\/strong>: Continuous service up to 150\u2013200\u00b0C.<\/p>\n<\/li>\n<li data-start=\"2314\" data-end=\"2376\">\n<p data-start=\"2316\" data-end=\"2376\"><strong data-start=\"2316\" data-end=\"2336\">Flame resistance<\/strong>: UL 94 V-0 self-extinguishing rating.<\/p>\n<\/li>\n<li data-start=\"2377\" data-end=\"2457\">\n<p data-start=\"2379\" data-end=\"2457\"><strong data-start=\"2379\" data-end=\"2407\">Moisture &amp; UV resistance<\/strong>: Suitable for outdoor and coastal environments.<\/p>\n<\/li>\n<li data-start=\"2458\" data-end=\"2538\">\n<p data-start=\"2460\" data-end=\"2538\"><strong data-start=\"2460\" data-end=\"2485\">Dimensional stability<\/strong>: Low shrinkage and warpage, even under heavy load.<\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"2545\" data-end=\"2600\"><span class=\"ez-toc-section\" id=\"3_What_are_the_Advantages_of_SMC_Busbar_Supports\"><\/span>3. What are the Advantages of SMC Busbar Supports?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure id=\"attachment_2072\" aria-describedby=\"caption-attachment-2072\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-2072\" title=\"Combination busbar clamp\" src=\"https:\/\/www.cnhaitan.net\/wp-content\/uploads\/2024\/04\/Combination-busbar-clamp-300x300.jpg\" alt=\"Combination busbar clamp\" width=\"300\" height=\"300\" srcset=\"https:\/\/www.cnhaitan.net\/wp-content\/uploads\/2024\/04\/Combination-busbar-clamp-300x300.jpg 300w, https:\/\/www.cnhaitan.net\/wp-content\/uploads\/2024\/04\/Combination-busbar-clamp-150x150.jpg 150w, https:\/\/www.cnhaitan.net\/wp-content\/uploads\/2024\/04\/Combination-busbar-clamp.jpg 750w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-2072\" class=\"wp-caption-text\">Combination busbar clamp<\/figcaption><\/figure>\n<h3 data-start=\"2602\" data-end=\"2642\"><span class=\"ez-toc-section\" id=\"31_Lightweight_Yet_Durable_Design\"><\/span>3.1 Lightweight Yet Durable Design<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"2643\" data-end=\"2893\">With a density of 1.8\u20132.0 g\/cm\u00b3, <a href=\"https:\/\/www.cnhaitan.net\/en_za\/a-series-bmc-smc-busbar-insulator-support\/\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"2676\" data-end=\"2698\">SMC busbar support<\/strong><\/a> is 75% lighter than steel, reducing overall panel weight. Despite being lightweight, it withstands continuous vibration cycles, making it ideal for renewable energy systems like wind turbines.<\/p>\n<h3 data-start=\"2895\" data-end=\"2929\"><span class=\"ez-toc-section\" id=\"32_High_Mechanical_Strength\"><\/span>3.2 High Mechanical Strength<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"2930\" data-end=\"3115\">SMC insulators provide a flexural strength of 150\u2013250 MPa, comparable to cast iron but without brittleness. They can handle short-circuit forces and mechanical shocks without failure.<\/p>\n<h3 data-start=\"3117\" data-end=\"3147\"><span class=\"ez-toc-section\" id=\"33_Excellent_Insulation\"><\/span>3.3 Excellent Insulation<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"3148\" data-end=\"3275\">Volume resistivity exceeds 10\u00b9\u00b3 \u03a9\u00b7cm, preventing leakage currents and ensuring safety in compact switchgear and panel boards.<\/p>\n<h3 data-start=\"3277\" data-end=\"3313\"><span class=\"ez-toc-section\" id=\"34_Thermal_Flame_Resistance\"><\/span>3.4 Thermal &amp; Flame Resistance<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"3314\" data-end=\"3509\">SMC supports maintaining structural integrity during fault current events. With an HDT (Heat Distortion Temperature) above 200\u00b0C, they outperform most plastics and guarantee fire-safe performance.<\/p>\n<h3 data-start=\"3511\" data-end=\"3545\"><span class=\"ez-toc-section\" id=\"35_Environmental_Resistance\"><\/span>3.5 Environmental Resistance<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"3546\" data-end=\"3744\">Unlike metal supports that rust, SMC supports resist corrosion, salt spray, and chemical attack. Their hydrophobic surface prevents tracking and ensures long service life even in humid conditions.<\/p>\n<h3 data-start=\"3746\" data-end=\"3781\"><span class=\"ez-toc-section\" id=\"36_Customization_Flexibility\"><\/span>3.6 Customization Flexibility<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"3782\" data-end=\"3968\">SMC can be molded into complex shapes, allowing integrated mounting flanges, clips, and barriers. This design adaptability makes it a preferred choice for OEM switchgear manufacturers.<\/p>\n<h2 data-start=\"3975\" data-end=\"4018\"><span class=\"ez-toc-section\" id=\"4_Applications_of_SMC_Busbar_Supports\"><\/span>4. Applications of SMC Busbar Supports<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul data-start=\"4019\" data-end=\"4431\">\n<li data-start=\"4019\" data-end=\"4084\">\n<p data-start=\"4021\" data-end=\"4084\"><strong data-start=\"4021\" data-end=\"4035\">Switchgear<\/strong>: Phase separation and support in LV\/MV panels.<\/p>\n<\/li>\n<li data-start=\"4085\" data-end=\"4148\">\n<p data-start=\"4087\" data-end=\"4148\"><strong data-start=\"4087\" data-end=\"4110\">Distribution boards<\/strong>: Secure mounting of copper busbars.<\/p>\n<\/li>\n<li data-start=\"4149\" data-end=\"4230\">\n<p data-start=\"4151\" data-end=\"4230\"><strong data-start=\"4151\" data-end=\"4176\">Substations (1\u201336 kV)<\/strong>: Mechanical and electrical isolation of conductors.<\/p>\n<\/li>\n<li data-start=\"4231\" data-end=\"4338\">\n<p data-start=\"4233\" data-end=\"4338\"><strong data-start=\"4233\" data-end=\"4261\">Renewable energy systems<\/strong>: Wind and solar power installations requiring vibration and UV resistance.<\/p>\n<\/li>\n<li data-start=\"4339\" data-end=\"4431\">\n<p data-start=\"4341\" data-end=\"4431\"><strong data-start=\"4341\" data-end=\"4362\">Industrial plants<\/strong>: Chemical-resistant SMC insulators used in corrosive environments.<\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"201\" data-end=\"245\"><span class=\"ez-toc-section\" id=\"5_SMC_vs_Other_Busbar_Support_Materials\"><\/span>5. SMC vs Other Busbar Support Materials<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"247\" data-end=\"600\">When engineers choose a busbar supporting insulator, the most common material options are SMC, porcelain, epoxy resin, and nylon. Each has unique electrical, thermal, and mechanical properties. Be<\/p>\n<p data-start=\"247\" data-end=\"600\">We break down the differences in a structured way so you can clearly understand where each material performs best and where it falls short.<\/p>\n<h3 data-start=\"607\" data-end=\"662\"><span class=\"ez-toc-section\" id=\"51_SMC_Busbar_Support_vs_Porcelain_Busbar_Support\"><\/span>5.1 SMC Busbar Support vs Porcelain Busbar Support<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"664\" data-end=\"966\">Porcelain has been the traditional choice for decades in substations and high-voltage applications. It provides very high dielectric strength and excellent resistance to weathering. However, it is also heavy and brittle, which means it can crack during installation or under mechanical shock.<\/p>\n<p data-start=\"968\" data-end=\"1453\">In contrast, <a href=\"https:\/\/www.cnhaitan.net\/en_za\/a-series-bmc-smc-busbar-insulator-support\/\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"981\" data-end=\"1004\">SMC busbar supports<\/strong><\/a> combine strong electrical insulation with a much lighter weight. The composite structure reinforced with glass fibers gives them 3\u20135 times higher impact resistance compared with porcelain, while still maintaining reliable insulation up to medium-voltage levels. Another key advantage is design flexibility: porcelain must be shaped and glazed in kilns, whereas SMC can be compression-molded into complex forms with integrated mounting points.<\/p>\n<p data-start=\"1455\" data-end=\"1485\"><strong data-start=\"1458\" data-end=\"1482\">Engineering takeaway<\/strong>:<\/p>\n<ul data-start=\"1486\" data-end=\"1772\">\n<li data-start=\"1486\" data-end=\"1627\">\n<p data-start=\"1488\" data-end=\"1627\">Choose porcelain if you are dealing with extra-high voltage (&gt;36 kV) systems that require long-term field-proven ceramic performance.<\/p>\n<\/li>\n<li data-start=\"1628\" data-end=\"1772\">\n<p data-start=\"1630\" data-end=\"1772\">Choose SMC for compact switchgear, panels, and renewables where weight reduction, shock resistance, and customized shapes are important.<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"1779\" data-end=\"1836\"><span class=\"ez-toc-section\" id=\"52_SMC_Busbar_Support_vs_Epoxy_Resin_Busbar_Support\"><\/span>5.2 SMC Busbar Support vs Epoxy Resin Busbar Support<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"1838\" data-end=\"2223\">Epoxy resins are widely used in electrical equipment because of their strong adhesion and chemical resistance. They can deliver high insulation values, but they are less effective under high mechanical stress. Standard epoxy supports usually achieve flexural strength in the 80\u2013120 MPa range, which is adequate for many panels but lower than SMC\u2019s 150\u2013250 MPa capability.<\/p>\n<p data-start=\"2225\" data-end=\"2623\">Another consideration is manufacturing efficiency. Epoxy supports are cast and require long curing times\u2014sometimes hours or days. By contrast, SMC can be compression-molded in just a few minutes, which greatly benefits mass production. Outdoors, epoxy materials often need extra stabilizers to resist UV radiation, while SMC naturally provides better protection against sunlight and moisture.<\/p>\n<p data-start=\"2625\" data-end=\"2655\"><strong data-start=\"2628\" data-end=\"2652\">Engineering takeaway<\/strong>:<\/p>\n<ul data-start=\"2656\" data-end=\"2903\">\n<li data-start=\"2656\" data-end=\"2782\">\n<p data-start=\"2658\" data-end=\"2782\">Choose epoxy if you need large monolithic parts or specialty molded components with very high dielectric requirements.<\/p>\n<\/li>\n<li data-start=\"2783\" data-end=\"2903\">\n<p data-start=\"2785\" data-end=\"2903\">Choose SMC when you need faster production cycles, higher load-bearing ability, and inherent outdoor resistance.<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"2910\" data-end=\"2961\"><span class=\"ez-toc-section\" id=\"53_SMC_Busbar_Support_vs_Nylon_Busbar_Support\"><\/span>5.3 SMC Busbar Support vs Nylon Busbar Support<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"2963\" data-end=\"3335\">Nylon (PA6 or PA66) is often used in low-cost or lightweight electrical applications. It has good impact strength and is easy to process. However, it suffers from creep under continuous load and absorbs moisture, which reduces dimensional stability. Thermally, nylon grades are usually limited to 160\u2013180\u00b0C, compared to SMC which can withstand 200\u00b0C or more.<\/p>\n<p data-start=\"3337\" data-end=\"3649\">Flame resistance is another issue: standard nylon supports often only meet UL 94 HB or V-2, whereas SMC insulators consistently achieve <a href=\"https:\/\/en.wikipedia.org\/wiki\/UL_94\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"3477\" data-end=\"3490\">UL 94 V-0<\/strong><\/a>, meaning they self-extinguish quickly without dripping. In heavy-duty busbar systems, nylon supports may deform over time, while SMC supports remain stable.<\/p>\n<p data-start=\"3651\" data-end=\"3681\"><strong data-start=\"3654\" data-end=\"3678\">Engineering takeaway<\/strong>:<\/p>\n<ul data-start=\"3682\" data-end=\"3905\">\n<li data-start=\"3682\" data-end=\"3766\">\n<p data-start=\"3684\" data-end=\"3766\">Choose nylon for lightweight, low-load indoor panels where cost is critical.<\/p>\n<\/li>\n<li data-start=\"3767\" data-end=\"3905\">\n<p data-start=\"3769\" data-end=\"3905\">Choose SMC for medium- or high-current busbars that require long-term mechanical stability, flame safety, and minimal maintenance.<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"3912\" data-end=\"3962\"><span class=\"ez-toc-section\" id=\"54_Beyond_the_Mainstream_Other_Alternatives\"><\/span>5.4 Beyond the Mainstream: Other Alternatives<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"3964\" data-end=\"4383\">\n<li data-start=\"3964\" data-end=\"4195\">\n<p data-start=\"3966\" data-end=\"4195\"><strong data-start=\"3966\" data-end=\"3989\">FRP\/GPO-3 Laminates<\/strong>: Fiberglass-reinforced polyester sheets are common in switchgear barriers and support parts. They have good dielectric strength and flame resistance, but less design flexibility compared with molded SMC.<\/p>\n<\/li>\n<li data-start=\"4196\" data-end=\"4383\">\n<p data-start=\"4198\" data-end=\"4383\"><strong data-start=\"4198\" data-end=\"4219\">DMC\/BMC Compounds<\/strong>: Similar to SMC but optimized for smaller parts. They are economical for compact insulators but generally have lower strength and durability than high-grade SMC.<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"4390\" data-end=\"4419\"><span class=\"ez-toc-section\" id=\"55_Comparative_Overview\"><\/span>5.5 Comparative Overview<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<table>\n<thead>\n<tr>\n<th>Property<\/th>\n<th>SMC<\/th>\n<th>Porcelain<\/th>\n<th>Epoxy Resin<\/th>\n<th>Nylon (PA)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Dielectric Strength<\/td>\n<td>High (\u226512 kV\/mm)<\/td>\n<td>Very high (15\u201320)<\/td>\n<td>Medium\u2013high (10\u201315)<\/td>\n<td>Moderate (5\u20138)<\/td>\n<\/tr>\n<tr>\n<td>Flexural Strength<\/td>\n<td>150\u2013250 MPa<\/td>\n<td>50\u201380 MPa<\/td>\n<td>80\u2013120 MPa<\/td>\n<td>60\u201380 MPa (varies)<\/td>\n<\/tr>\n<tr>\n<td>Thermal Capability<\/td>\n<td>200\u00b0C+<\/td>\n<td>High but brittle<\/td>\n<td>120\u2013150\u00b0C<\/td>\n<td>160\u2013180\u00b0C<\/td>\n<\/tr>\n<tr>\n<td>Flame Resistance<\/td>\n<td>UL 94 V-0\/5VA<\/td>\n<td>Inorganic, excellent<\/td>\n<td>V-0 achievable<\/td>\n<td>Mostly HB\u2013V-2<\/td>\n<\/tr>\n<tr>\n<td>Weight<\/td>\n<td>Light (1.8\u20132 g\/cm\u00b3)<\/td>\n<td>Heavy (2.3\u20132.6)<\/td>\n<td>Moderate<\/td>\n<td>Very light<\/td>\n<\/tr>\n<tr>\n<td>Design Flexibility<\/td>\n<td>High (moldable)<\/td>\n<td>Low<\/td>\n<td>Medium<\/td>\n<td>Medium<\/td>\n<\/tr>\n<tr>\n<td>Long-term Reliability<\/td>\n<td>25\u201330 years<\/td>\n<td>30+ years<\/td>\n<td>20 years<\/td>\n<td>10\u201315 years<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3 data-start=\"5414\" data-end=\"5443\"><span class=\"ez-toc-section\" id=\"56_Key_Decision_Factors\"><\/span>5.6 Key Decision Factors<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"5445\" data-end=\"5986\">\n<li data-start=\"5445\" data-end=\"5555\">\n<p data-start=\"5447\" data-end=\"5555\"><strong data-start=\"5447\" data-end=\"5464\">Voltage class<\/strong>: Porcelain dominates at the highest voltages; SMC is ideal up to medium-voltage systems.<\/p>\n<\/li>\n<li data-start=\"5556\" data-end=\"5660\">\n<p data-start=\"5558\" data-end=\"5660\"><strong data-start=\"5558\" data-end=\"5577\">Mechanical load<\/strong>: SMC outperforms epoxy and nylon in handling short-circuit forces and vibration.<\/p>\n<\/li>\n<li data-start=\"5661\" data-end=\"5771\">\n<p data-start=\"5663\" data-end=\"5771\"><strong data-start=\"5663\" data-end=\"5678\">Environment<\/strong>: For outdoor and coastal sites, SMC provides natural resistance to moisture, salt, and UV.<\/p>\n<\/li>\n<li data-start=\"5772\" data-end=\"5872\">\n<p data-start=\"5774\" data-end=\"5872\"><strong data-start=\"5774\" data-end=\"5799\">Production efficiency<\/strong>: SMC supports are molded in minutes, while epoxy requires long curing.<\/p>\n<\/li>\n<li data-start=\"5873\" data-end=\"5986\">\n<p data-start=\"5875\" data-end=\"5986\"><strong data-start=\"5875\" data-end=\"5893\">Lifecycle cost<\/strong>: Nylon is cheaper upfront but has shorter service life; SMC balances cost with durability.<\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"339\" data-end=\"379\"><span class=\"ez-toc-section\" id=\"6_How_to_Choose_SMC_Busbar_Supports\"><\/span>6. How to Choose SMC Busbar Supports<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"381\" data-end=\"594\">Choosing the right <a href=\"https:\/\/www.cnhaitan.net\/en_za\/a-series-bmc-smc-busbar-insulator-support\/\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"400\" data-end=\"422\">SMC busbar support<\/strong><\/a> is critical to ensure both electrical safety and long-term reliability. Engineers and procurement teams should evaluate the following factors before finalizing a design:<\/p>\n<h3 data-start=\"596\" data-end=\"620\"><span class=\"ez-toc-section\" id=\"61_System_Voltage\"><\/span>6.1 System Voltage<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"621\" data-end=\"888\">Always match the dielectric strength of the composite busbar insulator for panel boards to your system requirements. For example, a rating of \u226512 kV\/mm is suitable for a 10 kV system. Higher voltage systems require proportionally greater insulation margins.<\/p>\n<h3 data-start=\"890\" data-end=\"915\"><span class=\"ez-toc-section\" id=\"62_Mechanical_Load\"><\/span>6.2 Mechanical Load<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"916\" data-end=\"1113\">Check the flexural strength of the support. A value above 150 MPa ensures stability against short-circuit forces and vibration in heavy-duty switchgear and renewable energy installations.<\/p>\n<h3 data-start=\"1115\" data-end=\"1148\"><span class=\"ez-toc-section\" id=\"63_Application_Environment\"><\/span>6.3 Application Environment<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"1149\" data-end=\"1433\">\n<li data-start=\"1149\" data-end=\"1300\">\n<p data-start=\"1151\" data-end=\"1300\">Indoor use: For compact switchgear and busbar support for distribution box, standard SMC grades provide reliable insulation and durability.<\/p>\n<\/li>\n<li data-start=\"1301\" data-end=\"1433\">\n<p data-start=\"1303\" data-end=\"1433\">Outdoor or renewable systems: Use UV-stabilized and anti-tracking formulations to resist sunlight, humidity, and salt spray.<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"1435\" data-end=\"1465\"><span class=\"ez-toc-section\" id=\"64_Standards_Compliance\"><\/span>6.4 Standards Compliance<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"1466\" data-end=\"1545\">Always confirm certifications before purchasing. Reliable supports must meet:<\/p>\n<ul data-start=\"1546\" data-end=\"1682\">\n<li data-start=\"1546\" data-end=\"1601\">\n<p data-start=\"1548\" data-end=\"1601\"><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/32338\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"1548\" data-end=\"1561\">IEC 61439<\/strong><\/a> (switchgear &amp; controlgear assemblies)<\/p>\n<\/li>\n<li data-start=\"1602\" data-end=\"1636\">\n<p data-start=\"1604\" data-end=\"1636\">UL 94 V-0 flame resistance<\/p>\n<\/li>\n<li data-start=\"1637\" data-end=\"1682\">\n<p data-start=\"1639\" data-end=\"1682\">RoHS &amp; REACH environmental compliance<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1684\" data-end=\"1800\">These standards guarantee that the SMC insulator can withstand electrical stress while remaining eco-friendly.<\/p>\n<h3 data-start=\"1802\" data-end=\"1846\"><span class=\"ez-toc-section\" id=\"65_Customization_Design_Flexibility\"><\/span>6.5 Customization &amp; Design Flexibility<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"1847\" data-end=\"2193\">One of the biggest advantages of SMC is its moldability. If your design requires integrated clips, mounting flanges, or phase barriers, ask your supplier about customized solutions. Many <a href=\"https:\/\/www.cnhaitan.net\/en_za\/busbar-support\/\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"2038\" data-end=\"2083\">SMC busbar support manufacturers in China<\/strong><\/a> offer OEM\/ODM services to match panel board layouts, reduce assembly steps, and lower overall system costs.<\/p>\n<h2 data-start=\"2200\" data-end=\"2217\"><span class=\"ez-toc-section\" id=\"7_Conclusion\"><\/span>7. Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure id=\"attachment_2076\" aria-describedby=\"caption-attachment-2076\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-2076\" title=\"Low Voltage Insulator\" src=\"https:\/\/www.cnhaitan.net\/wp-content\/uploads\/2024\/04\/Low-Voltage-Insulator-300x300.jpg\" alt=\"Low Voltage Insulator\" width=\"300\" height=\"300\" srcset=\"https:\/\/www.cnhaitan.net\/wp-content\/uploads\/2024\/04\/Low-Voltage-Insulator-300x300.jpg 300w, https:\/\/www.cnhaitan.net\/wp-content\/uploads\/2024\/04\/Low-Voltage-Insulator-150x150.jpg 150w, https:\/\/www.cnhaitan.net\/wp-content\/uploads\/2024\/04\/Low-Voltage-Insulator.jpg 750w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-2076\" class=\"wp-caption-text\">Low Voltage Insulator<\/figcaption><\/figure>\n<p data-start=\"2219\" data-end=\"2556\"><a href=\"https:\/\/www.cnhaitan.net\/en_za\/a-series-bmc-smc-busbar-insulator-support\/\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"2219\" data-end=\"2241\">SMC busbar support<\/strong><\/a> has become the industry benchmark for low- and medium-voltage power systems, offering the ideal mix of mechanical strength, insulation safety, and design adaptability. Compared with porcelain, epoxy, and nylon supports, SMC provides superior flame resistance, long-term stability, and cost-effectiveness.<\/p>\n<p data-start=\"2558\" data-end=\"2973\">Whether you are designing switchgear, substations, or distribution boxes, using a <a href=\"https:\/\/www.cnhaitan.net\/en_za\/low-voltage-insulator\/\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"2644\" data-end=\"2691\">composite busbar insulator for panel boards<\/strong> <\/a>ensures safety, efficiency, and durability. For buyers seeking reliable sourcing, working with an experienced <strong data-start=\"2802\" data-end=\"2846\"><a href=\"https:\/\/www.cnhaitan.net\/en_za\/busbar-support\/\" target=\"_blank\" rel=\"noopener\">SMC busbar support manufacturer<\/a><\/strong>in China can provide high-quality products that comply with IEC and UL standards, along with cost advantages for global projects.<\/p>\n<p data-start=\"2975\" data-end=\"3201\">As power systems evolve toward smarter grids and renewable integration, busbar supporting insulators made from SMC will remain a vital component in ensuring stable, safe, and efficient electricity distribution worldwide.<\/p>","protected":false},"excerpt":{"rendered":"<p>1. Introduction In modern electrical power distribution systems, SMC busbar support has become a critical component for ensuring both mechanical stability and electrical insulation. SMC busbar supports are designed to fix and insulate busbars, which are copper or aluminum conductors that carry large currents. You&#8217;ll find these bus bar supports in critical locations like switchgear,&hellip; <a class=\"more-link\" href=\"https:\/\/www.cnhaitan.net\/en_za\/blog\/what-is-smc-busbar-support\">Continue reading <span class=\"screen-reader-text\">What is SMC Busbar Support?<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":2685,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2684","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-newsroom","entry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.cnhaitan.net\/en_za\/wp-json\/wp\/v2\/posts\/2684","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cnhaitan.net\/en_za\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cnhaitan.net\/en_za\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cnhaitan.net\/en_za\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cnhaitan.net\/en_za\/wp-json\/wp\/v2\/comments?post=2684"}],"version-history":[{"count":2,"href":"https:\/\/www.cnhaitan.net\/en_za\/wp-json\/wp\/v2\/posts\/2684\/revisions"}],"predecessor-version":[{"id":2687,"href":"https:\/\/www.cnhaitan.net\/en_za\/wp-json\/wp\/v2\/posts\/2684\/revisions\/2687"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cnhaitan.net\/en_za\/wp-json\/wp\/v2\/media\/2685"}],"wp:attachment":[{"href":"https:\/\/www.cnhaitan.net\/en_za\/wp-json\/wp\/v2\/media?parent=2684"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cnhaitan.net\/en_za\/wp-json\/wp\/v2\/categories?post=2684"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cnhaitan.net\/en_za\/wp-json\/wp\/v2\/tags?post=2684"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}