{"id":1913,"date":"2026-09-27T13:21:44","date_gmt":"2026-09-27T13:21:44","guid":{"rendered":"https:\/\/www.diyipcb.com\/pcb-copper-weight-trace-width-current\/"},"modified":"2026-09-27T13:51:25","modified_gmt":"2026-09-27T13:51:25","slug":"pcb-copper-weight-trace-width-current","status":"publish","type":"post","link":"https:\/\/www.diyipcb.com\/es\/pcb-copper-weight-trace-width-current\/","title":{"rendered":"Peso del cobre y anchura de las pistas en las placas de circuito impreso: por qu\u00e9 la corriente requiere m\u00e1s de una cifra"},"content":{"rendered":"<div class=\"diyi-article\">\n<p class=\"dn-summary\">\u201cUse heavier copper\u201d is not a complete answer to a power-routing problem. A useful review follows the current through the board, identifies its narrowest sections and considers the environment in which the circuit will operate. Copper weight is one input to that review.<\/p>\n<h2>Start with the operating requirements<\/h2>\n<p>Record the expected continuous current, any short-duration peaks, operating ambient temperature and the acceptable voltage drop. Also note whether the product operates in an enclosure or with airflow. Keep assumptions visible so a later reviewer can tell which operating case the layout was designed to support.<\/p>\n<h2>Understand what thicker copper changes<\/h2>\n<p>For the same conductor material and length, a larger copper cross-section lowers resistance. Both width and thickness contribute to that area. Temperature rise, however, also depends on the surrounding board and how heat leaves it. Texas Instruments\u2019 thermal-design guidance discusses copper thickness, spreading area and PCB construction together rather than treating copper weight as an isolated rating.<\/p>\n<h2>Follow the entire path<\/h2>\n<p>A broad copper pour can still feed a narrow connection at a pad or via transition. Review the full route from the input connector to the load and back through the return path. Include neck-downs, layer changes, fuse connections and any intentional current-sensing element in the discussion. Mark the areas that need calculation or measurement instead of assuming the largest visible pour determines the result.<\/p>\n<ul>\n<li>Where does the route become narrowest?<\/li>\n<li>Which sections move between layers?<\/li>\n<li>Do connector and component limits agree with the board requirement?<\/li>\n<li>Which current and ambient condition will be used for validation?<\/li>\n<\/ul>\n<h2>Keep calculator assumptions with the result<\/h2>\n<p>If you use a trace-width calculator, save the input values and the method it uses. Results obtained with different temperature-rise assumptions are not directly comparable. Treat the calculation as a design input, then validate the assembled prototype under representative conditions. This article deliberately does not assign an ampere rating to \u201c1 oz\u201d or \u201c2 oz\u201d copper without a geometry and operating case.<\/p>\n<h2>Translate the design into an order<\/h2>\n<p>Specify the required copper weight for the appropriate layers and verify how the fabricator describes finished copper. Ask about the associated track, spacing and process constraints before finalizing a dense layout. If a copper change forces a routing change, issue a new design revision rather than silently modifying the quotation settings.<\/p>\n<div class=\"dn-cta\">\n<p>Discuss a power-layout review through <a href=\"\/es\/producto\/pcb-design\/\">Dise\u00f1o de placas de circuito impreso<\/a>, or configure your released board in <a href=\"\/es\/producto\/pcb-pcba-order-online\/\">Presupuesto instant\u00e1neo de placas de circuito impreso<\/a>.<\/p>\n<\/div>\n<p class=\"dn-source\">Referencia t\u00e9cnica: <a href=\"https:\/\/www.ti.com\/lit\/an\/sprabi3b\/sprabi3b.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Texas Instruments: Thermal Design Guide for DSP and ARM Application Processors<\/a>, including PCB thermal-design considerations. The review questions here are general planning guidance, not a current-rating calculation.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>En lugar de elegir el grosor del cobre bas\u00e1ndose en una sola regla general, es mejor elaborar una especificaci\u00f3n \u00fatil para la ruta de la corriente.<\/p>","protected":false},"author":1,"featured_media":716,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[92],"tags":[],"class_list":["post-1913","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pcb-insights"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/www.diyipcb.com\/wp-content\/uploads\/2026\/08\/100x100_10-1787288700.png","_links":{"self":[{"href":"https:\/\/www.diyipcb.com\/es\/wp-json\/wp\/v2\/posts\/1913","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.diyipcb.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.diyipcb.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.diyipcb.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.diyipcb.com\/es\/wp-json\/wp\/v2\/comments?post=1913"}],"version-history":[{"count":0,"href":"https:\/\/www.diyipcb.com\/es\/wp-json\/wp\/v2\/posts\/1913\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.diyipcb.com\/es\/wp-json\/wp\/v2\/media\/716"}],"wp:attachment":[{"href":"https:\/\/www.diyipcb.com\/es\/wp-json\/wp\/v2\/media?parent=1913"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.diyipcb.com\/es\/wp-json\/wp\/v2\/categories?post=1913"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.diyipcb.com\/es\/wp-json\/wp\/v2\/tags?post=1913"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}