{"id":9815,"date":"2023-07-01T22:46:14","date_gmt":"2023-07-01T14:46:14","guid":{"rendered":"https:\/\/lorentzzi.com\/?post_type=product&#038;p=9815"},"modified":"2025-11-28T16:06:34","modified_gmt":"2025-11-28T08:06:34","slug":"ssr-40dd-dc-control-dc-solid-state-relay","status":"publish","type":"product","link":"https:\/\/lorentzzi.com\/fr\/products\/solid-state-relay\/single-phase-solid-state-relay\/ssr-40dd-dc-control-dc-solid-state-relay\/","title":{"rendered":"SSR 40DD, 40A DC Control DC Solid State Relay (relais \u00e0 semi-conducteurs)"},"content":{"rendered":"<h2>SSR 40DD DC Control DC Solid State Relay Introduction:<\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">This product is our 40A DC to DC solid state relay, its control voltage is 3-32 VDC, load voltage is 5-220 VDC.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">It is mainly used to control DC loads, such as DC heaters, DC motors, DC pumps, and other products powered by DC power supplies.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Its maximum load current can reach 40 amps, which means we can use it to control resistive loads up to 4000 W at 220 VDC or 1000 W motor at 220 VDC. The calculation formula is maximum load wattage = maximum load voltage * maximum current \/ 2 or 7(divided by 2 for calculating resistive load, divided by 7 for calculating inductive or capacitive load)..<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The SSR-40DD control section and load section are isolated by optocoupler, ensuring that users can safely operate DC heavy loads with safe, low DC power.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Our this DC solid state relay features high stability and long lifespan, generally we ensure this product can be used for at least for 5 years without any problem.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">If you want to know its wiring diagram, please read this article \u201c<\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/how-to-wire-a-solid-state-relay\/\"><span style=\"font-weight: 400;\">How To Wire A Solid State Relay?<\/span><\/a><\/span><span style=\"font-weight: 400;\">\u201d written by our professional team.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\">Another thing that needs attention is heat dissipation. Good heat dissipation can effectively extend the service life of solid-state relays. Therefore, in order to use this product for a longer period of time, please use it with our <span style=\"color: #ff0000;\"><a style=\"font-size: 16px; background-color: #ffffff; color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/products\/accessories\/heat-sink\/w-70-single-phase-ssr-heatsink\/\"><span style=\"font-weight: 400;\">W-70 radiator<\/span><\/a><\/span><span style=\"font-weight: 400;\">.<\/span><\/li>\n<li aria-level=\"1\">If you still have questions about this solid state relay product, such as price or technical aspects, please leave a message via the form below.<\/li>\n<\/ul>\n<h2>Typical Application:<\/h2>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter wp-image-16043 size-full\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2023\/07\/DC-solid-state-relay-used-with-PID-tempertaure-controller-to-control-DC-heater-1.jpg\" alt=\"DC solid state relay used with PID tempertaure controller to control DC heater\" width=\"1024\" height=\"512\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2023\/07\/DC-solid-state-relay-used-with-PID-tempertaure-controller-to-control-DC-heater-1.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2023\/07\/DC-solid-state-relay-used-with-PID-tempertaure-controller-to-control-DC-heater-1-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2023\/07\/DC-solid-state-relay-used-with-PID-tempertaure-controller-to-control-DC-heater-1-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2023\/07\/DC-solid-state-relay-used-with-PID-tempertaure-controller-to-control-DC-heater-1-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2023\/07\/DC-solid-state-relay-used-with-PID-tempertaure-controller-to-control-DC-heater-1-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<h2>Specifications:<\/h2>\n<div class=\"supsystic-table-loader spinner\"style=\"background-color:#000000\"><\/div><div id=\"supsystic-table-117_90681\" class=\"supsystic-tables-wrap \" style=\" width:100%; visibility: hidden; \" data-table-width-fixed=\"100%\" data-table-width-mobile=\"100%\" ><table id=\"supsystic-table-117\" class=\"supsystic-table border lightboxImg cell-border\" data-id=\"117\" data-view-id=\"117_90681\" data-title=\"SSR 40DD\" data-currency-format=\"$1,000.00\" data-percent-format=\"10.00%\" data-date-format=\"DD.MM.YYYY\" data-time-format=\"HH:mm\" data-features=\"[&quot;after_table_loaded_script&quot;]\" data-search-value=\"\" data-lightbox-img=\"\" data-head-rows-count=\"1\" data-pagination-length=\"50,100,All\" data-auto-index=\"off\" data-searching-settings=\"{&quot;columnSearchPosition&quot;:&quot;bottom&quot;,&quot;minChars&quot;:&quot;0&quot;}\" data-lang=\"default\" data-override=\"{&quot;emptyTable&quot;:&quot;&quot;,&quot;info&quot;:&quot;&quot;,&quot;infoEmpty&quot;:&quot;&quot;,&quot;infoFiltered&quot;:&quot;&quot;,&quot;lengthMenu&quot;:&quot;&quot;,&quot;search&quot;:&quot;&quot;,&quot;previous&quot;:&quot;&quot;,&quot;next&quot;:&quot;&quot;,&quot;zeroRecords&quot;:&quot;&quot;,&quot;exportLabel&quot;:&quot;&quot;,&quot;file&quot;:&quot;default&quot;}\" data-merged=\"[]\" data-responsive-mode=\"0\" data-from-history=\"0\" ><thead><tr><th class=\"\" style=\"width:; padding: 0 !important;\"><\/th><th class=\"\" style=\"width:; padding: 0 !important;\"><\/th><\/tr><\/thead><tbody><tr style=\"height:px\" ><td data-cell-id=\"A1\" data-x=\"0\" data-y=\"1\" data-db-index=\"1\" class=\"htCenter htMiddle bg-c7c7c7\" data-cell-type=\"text\" data-original-value=\"Mode\" data-order=\"Mode\" style=\"min-width:43.2203%; \" >Mode <\/td><td data-cell-id=\"B1\" data-x=\"1\" data-y=\"1\" data-db-index=\"1\" class=\"htCenter htMiddle bg-c7c7c7\" data-cell-type=\"text\" data-original-value=\"SSR 40DD\" data-order=\"SSR 40DD\" style=\"min-width:56.7797%; \" >SSR 40DD <\/td><\/tr><tr style=\"height:px\" ><td data-cell-id=\"A2\" data-x=\"0\" data-y=\"2\" data-db-index=\"2\" class=\"htCenter htMiddle\" data-cell-type=\"text\" data-original-value=\"Control voltage\" data-order=\"Control voltage\" >Control voltage <\/td><td data-cell-id=\"B2\" data-x=\"1\" data-y=\"2\" data-db-index=\"2\" class=\"htCenter htMiddle\" data-cell-type=\"text\" data-original-value=\"3-32 VDC\" data-order=\"3-32 VDC\" >3-32 VDC <\/td><\/tr><tr style=\"height:px\" ><td data-cell-id=\"A3\" data-x=\"0\" data-y=\"3\" data-db-index=\"3\" class=\"htCenter htMiddle bg-c7c7c7\" data-cell-type=\"text\" data-original-value=\"Max control current\" data-order=\"Max control current\" >Max control current <\/td><td data-cell-id=\"B3\" data-x=\"1\" data-y=\"3\" data-db-index=\"3\" class=\"htCenter htMiddle bg-c7c7c7\" data-cell-type=\"text\" data-original-value=\"40 mA\" data-order=\"40 mA\" >40 mA <\/td><\/tr><tr style=\"height:px\" ><td data-cell-id=\"A4\" data-x=\"0\" data-y=\"4\" data-db-index=\"4\" class=\"htCenter htMiddle\" data-cell-type=\"text\" data-original-value=\"Switch-on voltage\" data-order=\"Switch-on voltage\" >Switch-on voltage <\/td><td data-cell-id=\"B4\" data-x=\"1\" data-y=\"4\" data-db-index=\"4\" class=\"htCenter htMiddle\" data-cell-type=\"text\" data-original-value=\"3 VDC\" data-order=\"3 VDC\" >3 VDC <\/td><\/tr><tr style=\"height:px\" ><td data-cell-id=\"A5\" data-x=\"0\" data-y=\"5\" data-db-index=\"5\" class=\"htCenter htMiddle bg-c7c7c7\" data-cell-type=\"text\" data-original-value=\"Switch off voltage\" data-order=\"Switch off voltage\" >Switch off voltage <\/td><td data-cell-id=\"B5\" data-x=\"1\" data-y=\"5\" data-db-index=\"5\" class=\"htCenter htMiddle bg-c7c7c7\" data-cell-type=\"text\" data-original-value=\"2 VDC\" data-order=\"2 VDC\" >2 VDC <\/td><\/tr><tr style=\"height:px\" ><td data-cell-id=\"A6\" data-x=\"0\" data-y=\"6\" data-db-index=\"6\" class=\"htCenter htMiddle\" data-cell-type=\"text\" data-original-value=\"Load voltage\" data-order=\"Load voltage\" >Load voltage <\/td><td data-cell-id=\"B6\" data-x=\"1\" data-y=\"6\" data-db-index=\"6\" class=\"htCenter htMiddle\" data-cell-type=\"text\" data-original-value=\"5-220 VDC\" data-order=\"5-220 VDC\" >5-220 VDC <\/td><\/tr><tr style=\"height:px\" ><td data-cell-id=\"A7\" data-x=\"0\" data-y=\"7\" data-db-index=\"7\" class=\"htCenter htMiddle bg-c7c7c7\" data-cell-type=\"text\" data-original-value=\"Peak load voltage\" data-order=\"Peak load voltage\" >Peak load voltage <\/td><td data-cell-id=\"B7\" data-x=\"1\" data-y=\"7\" data-db-index=\"7\" class=\"htCenter htMiddle bg-c7c7c7\" data-cell-type=\"text\" data-original-value=\"250 VDC\" data-order=\"250 VDC\" >250 VDC <\/td><\/tr><tr style=\"height:px\" ><td data-cell-id=\"A8\" data-x=\"0\" data-y=\"8\" data-db-index=\"8\" class=\"htCenter htMiddle\" data-cell-type=\"text\" data-original-value=\"Load current\" data-order=\"Load current\" >Load current <\/td><td data-cell-id=\"B8\" data-x=\"1\" data-y=\"8\" data-db-index=\"8\" class=\"htCenter htMiddle\" data-cell-type=\"text\" data-original-value=\"40 A\" data-order=\"40 A\" >40 A <\/td><\/tr><tr style=\"height:px\" ><td data-cell-id=\"A9\" data-x=\"0\" data-y=\"9\" data-db-index=\"9\" class=\"htCenter htMiddle bg-c7c7c7\" data-cell-type=\"text\" data-original-value=\"Max off-state leakage current\" data-order=\"Max off-state leakage current\" >Max off-state leakage current <\/td><td data-cell-id=\"B9\" data-x=\"1\" data-y=\"9\" data-db-index=\"9\" class=\"htCenter htMiddle bg-c7c7c7\" data-cell-type=\"text\" data-original-value=\"2 mA\" data-order=\"2 mA\" >2 mA <\/td><\/tr><tr style=\"height:px\" ><td data-cell-id=\"A10\" data-x=\"0\" data-y=\"10\" data-db-index=\"10\" class=\"htCenter htMiddle\" data-cell-type=\"text\" data-original-value=\"Max on-state voltage drop\" data-order=\"Max on-state voltage drop\" >Max on-state voltage drop <\/td><td data-cell-id=\"B10\" data-x=\"1\" data-y=\"10\" data-db-index=\"10\" class=\"htCenter htMiddle\" data-cell-type=\"text\" data-original-value=\"\u22641 VDC\" data-order=\"\u22641 VDC\" >\u22641 VDC <\/td><\/tr><tr style=\"height:px\" ><td data-cell-id=\"A11\" data-x=\"0\" data-y=\"11\" data-db-index=\"11\" class=\"htCenter htMiddle bg-c7c7c7\" data-cell-type=\"text\" data-original-value=\"Product dimension\" data-order=\"Product dimension\" >Product dimension <\/td><td data-cell-id=\"B11\" data-x=\"1\" data-y=\"11\" data-db-index=\"11\" class=\"htCenter htMiddle bg-c7c7c7\" data-cell-type=\"text\" data-original-value=\"44.8*57.4*28 mm\" data-order=\"44.8*57.4*28 mm\" >44.8*57.4*28 mm <\/td><\/tr><tr style=\"height:px\" ><td data-cell-id=\"A12\" data-x=\"0\" data-y=\"12\" data-db-index=\"12\" class=\"htCenter htMiddle\" data-cell-type=\"text\" data-original-value=\"Net weight\" data-order=\"Net weight\" >Net weight <\/td><td data-cell-id=\"B12\" data-x=\"1\" data-y=\"12\" data-db-index=\"12\" class=\"htCenter htMiddle\" data-cell-type=\"text\" data-original-value=\"100 g\" data-order=\"100 g\" >100 g <\/td><\/tr><tr style=\"height:px\" ><td data-cell-id=\"A13\" data-x=\"0\" data-y=\"13\" data-db-index=\"13\" class=\"htCenter htMiddle bg-c7c7c7\" data-cell-type=\"text\" data-original-value=\"Dielectric strength(input to output)\" data-order=\"Dielectric strength(input to output)\" >Dielectric strength(input to output) <\/td><td data-cell-id=\"B13\" data-x=\"1\" data-y=\"13\" data-db-index=\"13\" class=\"htCenter htMiddle bg-c7c7c7\" data-cell-type=\"text\" data-original-value=\"4000 V\" data-order=\"4000 V\" >4000 V <\/td><\/tr><tr style=\"height:px\" ><td data-cell-id=\"A14\" data-x=\"0\" data-y=\"14\" data-db-index=\"14\" class=\"htCenter htMiddle\" data-cell-type=\"text\" data-original-value=\"Dielectric strength(input to output to base)\" data-order=\"Dielectric strength(input to output to base)\" >Dielectric strength(input to output to base) <\/td><td data-cell-id=\"B14\" data-x=\"1\" data-y=\"14\" data-db-index=\"14\" class=\"htCenter htMiddle\" data-cell-type=\"text\" data-original-value=\"2500 V\" data-order=\"2500 V\" >2500 V <\/td><\/tr><tr style=\"height:px\" ><td data-cell-id=\"A15\" data-x=\"0\" data-y=\"15\" data-db-index=\"15\" class=\"htCenter htMiddle bg-c7c7c7\" data-cell-type=\"text\" data-original-value=\"Operating temperature\" data-order=\"Operating temperature\" >Operating temperature <\/td><td data-cell-id=\"B15\" data-x=\"1\" data-y=\"15\" data-db-index=\"15\" class=\"htCenter htMiddle bg-c7c7c7\" data-cell-type=\"text\" data-original-value=\"-30\u2103~80\u2103\" data-order=\"-30\u2103~80\u2103\" >-30\u2103~80\u2103 <\/td><\/tr><tr style=\"height:px\" ><td data-cell-id=\"A16\" data-x=\"0\" data-y=\"16\" data-db-index=\"16\" class=\"htCenter htMiddle\" data-cell-type=\"text\" data-original-value=\"Certification\" data-order=\"Certification\" >Certification <\/td><td data-cell-id=\"B16\" data-x=\"1\" data-y=\"16\" data-db-index=\"16\" class=\"htCenter htMiddle\" data-cell-type=\"text\" data-original-value=\"CE\" data-order=\"CE\" >CE <\/td><\/tr><tr style=\"height:px\" ><td data-cell-id=\"A17\" data-x=\"0\" data-y=\"17\" data-db-index=\"17\" class=\"htCenter htMiddle bg-c7c7c7\" data-cell-type=\"text\" data-original-value=\"Terminals\" data-order=\"Terminals\" >Terminals <\/td><td data-cell-id=\"B17\" data-x=\"1\" data-y=\"17\" data-db-index=\"17\" class=\"htCenter htMiddle bg-c7c7c7\" data-cell-type=\"text\" data-original-value=\"Screw\" data-order=\"Screw\" >Screw <\/td><\/tr><tr style=\"height:px\" ><td data-cell-id=\"A18\" data-x=\"0\" data-y=\"18\" data-db-index=\"18\" class=\"htCenter htMiddle\" data-cell-type=\"text\" data-original-value=\"Remark\" data-order=\"Remark\" >Remark <\/td><td data-cell-id=\"B18\" data-x=\"1\" data-y=\"18\" data-db-index=\"18\" class=\"htCenter htMiddle\" data-cell-type=\"text\" data-original-value=\"When using this SSR, please consider using a suitable heat sink to help cool it, otherwise high temperatures exceeding 80 degrees Celsius will cause permanent damage to this SSR.\" data-order=\"When using this SSR, please consider using a suitable heat sink to help cool it, otherwise high temperatures exceeding 80 degrees Celsius will cause permanent damage to this SSR.\" >When using this SSR, please consider using a suitable heat sink to help cool it, otherwise high temperatures exceeding 80 degrees Celsius will cause permanent damage to this SSR. <\/td><\/tr><\/tbody><\/table><!-- \/#supsystic-table-117.supsystic-table --><\/div><!-- \/.supsystic-tables-wrap --><!-- Tables Generator by Supsystic --><!-- Version:1.11.0 --><!-- http:\/\/supsystic.com\/ --><a title=\"WordPress Data Table Plugin\" style=\"display:none;\" href=\"https:\/\/supsystic.com\/plugins\/wordpress-data-table-plugin\/?utm_medium=love_link\" target=\"_blank\">WordPress Data Table Plugin<\/a>\n","protected":false},"excerpt":{"rendered":"<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Sp\u00e9cialement con\u00e7u pour les charges monophas\u00e9es \u00e0 courant continu,<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Courant de charge : 40A,<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tension de contr\u00f4le : 3-32VDC,<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tension de charge : 24-220VDC,<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Taille compacte et longue dur\u00e9e de vie.<\/span><\/li>\n<\/ol>","protected":false},"featured_media":17622,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_brand":[],"product_cat":[164,61],"product_tag":[],"class_list":{"0":"post-9815","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-single-phase-solid-state-relay","7":"product_cat-solid-state-relay","8":"desktop-align-center","9":"tablet-align-left","10":"mobile-align-left","12":"first","13":"instock","14":"shipping-taxable","15":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.0 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>SSR 40DD, 40A DC Control DC Solid State Relay<\/title>\n<meta name=\"description\" content=\"The SSR 40DD is a DC control DC 40amp solid state relay, the control voltage is 3-32VDC, load voltage is 5-220VDC, we can use it in 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