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I've referenced many symbol sheets with no avail.

What would JP5 'AutoON' be here? I assume it's a switch that is default on, but the symbol is foreign to me.

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  • \$\begingroup\$ May be it can be a symbol of protective relay \$\endgroup\$
    – Ady
    Oct 14, 2021 at 6:01

3 Answers 3

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The symbol and 'JP' label suggest that it is a jumper used to bypass the switch.

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Figure 1. A 2-pin jumper on a 5-way pin header. Image source: Sparkfun.

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    \$\begingroup\$ Another use for the jumper pins could also be to install an alternative remote switch, either for integration into a larger system or for automation of the power-on function by a micro or logic controller, etc. \$\endgroup\$
    – J...
    Oct 14, 2021 at 14:40
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The JP5 is most likely just a standard jumper block, maybe a standard 2.54mm/0.1" pin header with two pins, allowing the user to use pushbutton manually when jumper is removed or short out the pushbutton permanently by mounting the jumper block.

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It's a circuit breaker symbol used incorrectly to indicate a jumper block. Given that this symbol is quite universal, its misuse is misleading - the schematic's author might as well used no symbol besides the two terminals, and with the JP reference designator it'd have been obvious still what it is.

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