Electronics > PCB/EDA/CAD
Schematic Symbol for a Heat Sink
sdscotto:
I've looked all over and can't find an official or standard schematic symbol for a heatsink.
Anyone have a favorite they can point me towards?
Thanks in advance,
scotto
Uncle Vernon:
A heatsink generally wont be shown in a schematic, it plays no part electrically. If you wish to indicate additional information you could use something like the hot surface symbol.
sdscotto:
--- Quote from: Uncle Vernon on July 30, 2011, 10:39:43 pm ---A heatsink generally wont be shown in a schematic, it plays no part electrically.
--- End quote ---
I understand that generally it wouldn't be included, which is probably why a symbol was difficult to find. My heatsink does have two through-hole pads that will be tied to ground, which is why I wanted to add it to the schematic.
--- Quote ---If you wish to indicate additional information you could use something like the hot surface symbol.
--- End quote ---
An excellent idea, thank you!
Alex:
The most common I have used and seen is a dashed line following the contour of a standard schematic symbol.
You can place an asterisk next to the symbol and as a footnote have something like: Power dissipation x, mounted on heatsink y, thermal resistance z, see mechanical BOM. You should also indicate if the heatsink is live or too hot to touch.
Zero999:
I think it's a good idea to draw a heat sink and will do so in future.
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