Comment on Automatic Fire Extinguisher for 3D Printer Cabinet

• FuglyDuck@lemmy.world ⁨4⁩ ⁨months⁩ ago

  Eh. when was the last time a mosfet melted on anyone? not saying it can’t happen, but mosfets are at fairly reliable. as long as you’re not trying to push wayyy too much power through them; and also proper surge protection to avoid things like bad power in your house frying them.

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  • SzethFriendOfNimi@lemmy.world ⁨4⁩ ⁨months⁩ ago

    It’s not that they melt as much as they just keep dumping heat into the heater cartridge and wires.

    And if failed in an on state thermal runaway isn’t going to stop it.

    It’s relatively rare though. I’m not too worried about it but it’s one of the reasons I watch my printer and of course there’s thermal fuses for such occasions if you really needed it.

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    • Damage@feddit.it ⁨4⁩ ⁨months⁩ ago

      Ideally the heater shouldn’t be powerful enough to set itself on fire even at 100% power I guess.

      For bed heaters there are thermal fuses.

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      • SzethFriendOfNimi@lemmy.world ⁨4⁩ ⁨months⁩ ago

        The heater no, but a blob of filament with the heat pumping into it is worrying.

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