Timeline for Does adding thermal relief on PCB increase electrical resistance?
Current License: CC BY-SA 3.0
12 events
| when toggle format | what | by | license | comment | |
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| Dec 23, 2016 at 18:29 | comment | added | JYelton | @Segei Yes, a signal layer where the pad connects to a trace rather than a plane should not need a thermal relief. If the trace is large, there may be exceptions. | |
| Dec 23, 2016 at 9:15 | comment | added | Sergei Gorbikov | +1, awesome answer. Is it true that for a through hole pad a thermal relief pads are necessary only on plane layers (PWR and GND)? On signal layers (bottom and top) there is no need for a thermal relief pad, isn't it? 10x. | |
| Jul 18, 2014 at 4:04 | comment | added | JAMS88 | This answer is REALLY good, but you should give a look to this answer to a similar question that makes a lot of sense, so basically depends if your board of gonna be soldered by hand (then you put thermal relief ) or in oven (then you don't put thermal relief). | |
| Sep 20, 2013 at 16:26 | comment | added | scld | For thermal calculations, although not precise, you can mostly assume the change in thermal resistance is proportional to the change in electrical resistance. So, your 4x increase in resistance (which, as you said, is still only an incremental increase) gets you on the order of 4x "easier" soldering. The thermal equations bear a striking resemblance to the electrical ones. | |
| Sep 20, 2013 at 1:44 | history | edited | JYelton | CC BY-SA 3.0 |
Clarified "empty space" to mean one such space rather than all four
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| Jul 19, 2013 at 11:44 | history | edited | Phil Frost | CC BY-SA 3.0 |
correct and format math
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| Jul 19, 2013 at 9:10 | vote | accept | user2578666 | ||
| Jul 19, 2013 at 9:03 | history | edited | JYelton | CC BY-SA 3.0 |
Added footnote.
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| Jul 19, 2013 at 8:54 | history | edited | JYelton | CC BY-SA 3.0 |
Added image and rough math.
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| Jul 19, 2013 at 8:36 | history | edited | JYelton | CC BY-SA 3.0 |
Added image.
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| Jul 19, 2013 at 8:29 | comment | added | user2578666 | That makes since. Its that electrical resistance also increases but the increase is not that significant compared to thermal resistance | |
| Jul 19, 2013 at 8:22 | history | answered | JYelton | CC BY-SA 3.0 |