{"id":32,"date":"2016-11-21T16:14:51","date_gmt":"2016-11-21T15:14:51","guid":{"rendered":"http:\/\/wp.adam-research.de\/?page_id=32"},"modified":"2025-09-29T15:09:23","modified_gmt":"2025-09-29T13:09:23","slug":"strombelastbarkeit","status":"publish","type":"page","link":"https:\/\/www.adam-research.de\/en\/strombelastbarkeit\/","title":{"rendered":"Current"},"content":{"rendered":"

Current Carrying Capacity<\/strong> is defined as \"the maximum electrical current\u00a0 that can be\u00a0 continuously carried by a conductor, without causing\u00a0 an objectionable degradation of electrical or mechanical properties of the product<\/em>\" (IPC-2152<\/strong>). It is easy to oversize trace dimensions: just make it wide and thick (cf. White Paper Nr.2<\/a>).\u00a0 To master the constrains from area, environmental condition and probably time is far beyond guessing and is the realm of detailed TRM<\/strong><\/span> simulations.
\n<\/i><\/p>\n

Electric current is creating heat ...<\/strong>
\nIt is easy to calculate the electric resistance of a trace and to multiply by I<\/em>\u00b2. But you wouldn't know how to convert power to temperature. That depends on heat transfer within the PCB and loss of heat to the ambient. The equilibrium between heat generation and heat loss is represented by the temperature value.<\/p>\n

... and what will be<\/strong> temperature?<\/strong>
\nThis is answered best by a 3-D simulation with TRM<\/strong><\/span>. The images below demonstrate that even the most simple trace geometry can show a variety of temperatures depending on the board properties and layout. Old IPC-2221<\/strong> is assuming a bi-layer board\u00a0 with a bottom copper cladding (undocumented). New IPC-2152<\/strong> uses a worst case scenario on a single layer board.<\/p>\n

\"TRM<\/div>\n

Top left: one trace on a single layer board: Bottom left: single layer but copper flooding around the trace with gap. Top right: one trace with copper cladding on bottom; Bottom right: bi-layer with top layer copper flooding. All calculations done with 11 Ampere.<\/p>\n

TRM<\/strong><\/span> also can handle time-dependent currents (e.g. pulses or mission profiles) and calculate temperature transients. And, of course, using your individual stack-up,<\/strong> layers' geometry and other heat sources.<\/div>\n
Use TRM to calculate your own ampacity charts!<\/strong><\/span><\/div>\n
<\/div>\n

 <\/p>","protected":false},"excerpt":{"rendered":"

Current Carrying Capacity is defined as \"the maximum electrical current\u00a0 that can be\u00a0 continuously carried by a conductor, without causing\u00a0 an objectionable degradation of electrical or mechanical properties of the product\" (IPC-2152). It is easy to oversize trace dimensions: just make it wide and thick (cf. White Paper Nr.2).\u00a0 To master the constrains from area, ...continue reading \"Current\"<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":84,"parent":0,"menu_order":3,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"yoast_head":"\nCurrent - ADAM Research<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.adam-research.de\/strombelastbarkeit\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[:de]Strombelastbarkeit[:en]Current [:fr]Courant[:es]Corriente admisible[:] - ADAM Research\" \/>\n<meta property=\"og:description\" content=\"Current Carrying Capacity is defined as "the maximum electrical current\u00a0 that can be\u00a0 continuously carried by a conductor, without causing\u00a0 an objectionable degradation of electrical or mechanical properties of the product" (IPC-2152). 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