The Best Protection for your Circuit is NOT a Fuse. but a Resettable Fuse? EB#54
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Date: 2023-02-26
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Comments and reviews: 14
Sebas
In late 90s, I found a schematic of a resetteable fuse made with an thyristor. That was not automatically resetteable but instead when triggered, you had to push a button to rearm it. I built that circuit (and I remember using a potentiometer to make it adjustable) and used it as the fuse at the ouput of my homemade bench variable power supply. However, I remember it being not reliable at low voltages.
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In late 90s, I found a schematic of a resetteable fuse made with an thyristor. That was not automatically resetteable but instead when triggered, you had to push a button to rearm it. I built that circuit (and I remember using a potentiometer to make it adjustable) and used it as the fuse at the ouput of my homemade bench variable power supply. However, I remember it being not reliable at low voltages.
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Mirko
Yeah love these things. The fuse in my Roborock is either cheap or not sized for the job.
Now my vacuum can't charge anymore unless I allow it to cool down completely after cleaning my apartment. It is a know problem, I have to take the entire thing apart to replace it. So tempted to just solder a wire in place but it may protect against the battery going into nuke mode during charging.
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Yeah love these things. The fuse in my Roborock is either cheap or not sized for the job.
Now my vacuum can't charge anymore unless I allow it to cool down completely after cleaning my apartment. It is a know problem, I have to take the entire thing apart to replace it. So tempted to just solder a wire in place but it may protect against the battery going into nuke mode during charging.
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Emma
One of your long time viewers here! You built my electronic hobbyist childhood. And i got an entire library of your videos to watch them offline, i also made a powerful class d amp based on your design and i still upgrade it now
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One of your long time viewers here! You built my electronic hobbyist childhood. And i got an entire library of your videos to watch them offline, i also made a powerful class d amp based on your design and i still upgrade it now
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Paxton
I had resettable fuses on my first 3d printer in 2015. I did not know what they were so I counteracted their current limitations with fans. in my use case they were not sized correctly and a glass fuse would have been better.
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I had resettable fuses on my first 3d printer in 2015. I did not know what they were so I counteracted their current limitations with fans. in my use case they were not sized correctly and a glass fuse would have been better.
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Bobbys
Could this be used to lower a start up current to a max amount? I know it couldn't by itself. But perhaps in conjunction with a circuit to switch current draw to a alternate circuit with a resistance added?
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Could this be used to lower a start up current to a max amount? I know it couldn't by itself. But perhaps in conjunction with a circuit to switch current draw to a alternate circuit with a resistance added?
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NOOBOARD
Are you sponsored by Mouser? Just asking because there are multiple other sopurces where someone can get Resetable Fuses (utm_campaign=GS) Pls mark your videos as advertisements.
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Are you sponsored by Mouser? Just asking because there are multiple other sopurces where someone can get Resetable Fuses (utm_campaign=GS) Pls mark your videos as advertisements.
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jesha
I've seen many PCB's with surface mount fuses. But I never thought that they were the resettable ones. So thank you for letting me know that and this video topic is awesome.
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I've seen many PCB's with surface mount fuses. But I never thought that they were the resettable ones. So thank you for letting me know that and this video topic is awesome.
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Stephen
This was a very well presented introduction to these fuses. I never knew they were that complicated, or available in so many different ratings. Thanks, as always; -)
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This was a very well presented introduction to these fuses. I never knew they were that complicated, or available in so many different ratings. Thanks, as always; -)
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jort93z
The comparison to the glass fuse was a bit pointless. Should have picked a 500mA glass fuse, rather than a 1A rated one, as your PPTC was also rated for 500mA.
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The comparison to the glass fuse was a bit pointless. Should have picked a 500mA glass fuse, rather than a 1A rated one, as your PPTC was also rated for 500mA.
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Lab
It looks very similar to capacitor or varistor. This might trick people to think this component is having short circuit, and replace it with capacitor.
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It looks very similar to capacitor or varistor. This might trick people to think this component is having short circuit, and replace it with capacitor.
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TheWomble
There are tons of these in fire alarm systems, and act as the required current limiting for all of the input and output circuits on them.
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There are tons of these in fire alarm systems, and act as the required current limiting for all of the input and output circuits on them.
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Bij
Could you test the difference between fuses? Like Hi-Fi fuse vs normal one?
If there are any differences in measurements and such
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Could you test the difference between fuses? Like Hi-Fi fuse vs normal one?
If there are any differences in measurements and such
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me
I was studing pptc in this days. the right video in the right time. thank you very much. i was asking me about theys slowness too.
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I was studing pptc in this days. the right video in the right time. thank you very much. i was asking me about theys slowness too.
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Justin
I actually have a few of these. I always thought they were capacitors, but they never worked as caps. Thanks for the vid
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I actually have a few of these. I always thought they were capacitors, but they never worked as caps. Thanks for the vid
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