The question says it all. If you have a definite answer, it would be great if you could post a photo of the pi zero, where the fuse is pointed out.
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Questions are not for answers – Christian Feb 01 '17 at 12:03
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OK, should I create a new answer from it, and remove the answer? I am not sure. – Stowoda Feb 01 '17 at 15:54
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It is entierly valid to answer your own question. It would be even better to edit the current answer, since you got the info there, but you might be a tad low on reputation. – Christian Feb 01 '17 at 15:57
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OK; I just moved it into the answer part. Thanks for the hint. – Stowoda Feb 01 '17 at 16:04
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This looks much better and readable. Nice job – Christian Feb 01 '17 at 16:06
3 Answers
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The Pi Zero does not have a fuse (polyfuse or otherwise).
See this Raspberry Pi org forum post.
Also see these limited schematics.
joan
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NO polyfuse for raspberry pi zero
Thanks to Joan I got the information to complete this request. Here are the schematics for the power supply of both raspberry pi Zero and PRI 3, .
Raspberry Pi Zero without fuse:
And Here for comparision RPI3 with polyfuse:
Stowoda
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So: on the bright side the RPi Zero is not going to suffer from volt-drop to the same extent when power is drawn from the +5V pins on the GPIO connections...! – SlySven Jul 11 '17 at 15:34
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It does not have a polyfuse, but good fuses are cheap. If you want a fuse, use a nice glass fuse:
Or a tiny fuse:
To check if you've popped it, just use an ohm measurement. You also do not have to waste a day or more praying that your polyfuse has saved you.
Or add your own polyfuse:
user2497
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Of course you will have to use the right fuse (for a fuse of current rating Iₙ you will need to draw at least 2 * Iₙ and possibly more to get it to fuse in a reasonable time) and as far as semiconductor equipment with a glass/ceramic fuse you can often find that the circuit will work fine without any of that nasty volt-drop associated with poly-fuses - it is just that in the event of an over-voltage or down-stream overload the semiconductors protect the fuse by burning out in an open-circuit manner so as to not cause the fuse to blow... 8-P – SlySven Oct 24 '17 at 00:06
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@SlySven Yes, a fast fuse. The right fuse. I like glass-case fuses in proper fuse mountings. Polyfuses are silly. – user2497 Oct 24 '17 at 00:08