Davitu 20PCS PTC Resettable Fuses 30V 4A RUEF400 PPTC (Polymeric PTC) PolySwitch

well just got back from the junk store and show you what a bot these are bouncy though these are rubber grommets so I needed some of those but this is what I went to the junk store for some six megahertz oscillators to finish up my why's that Eddie here so that will go in there but that's not why I'm making the video today I found some of these guys which are interesting and I thought we'd play with them we saw them earlier in a different video which was this one it's this solid-state fuses poly fuse this one happens to be a three amp 3-up fuse and the way they work is they become very very resistive when they get hot and nothing goes through them so they they open up and then when they when you remove short or whatever and they cool back down they turn back on again so they're a resettable fuse so these are resettable fuses the box labeled these as 50 main are 500 milliamps so these ar