Noodle_2000 Posted May 28, 2009 Report Share Posted May 28, 2009 I was wondering if anyone knew which polyswitch I should use that is suitable for airsoft from this website. Heres the link : http://www.onlybatterypacks.com/items.asp?db=67 Thanks, Link to post Share on other sites
Wege Posted May 29, 2009 Report Share Posted May 29, 2009 http://en.wikipedia.org/wiki/Resettable_fuse interesting.. Link to post Share on other sites
scratch Posted May 29, 2009 Report Share Posted May 29, 2009 None of those. Highest rated is 3.5A. You won't find a strap poly you can weld into a battery pack which can handle AEG currents. Link to post Share on other sites
crackisbad Posted May 30, 2009 Report Share Posted May 30, 2009 this one here: 30A, 20A or 10A Fuse or this one here: 24A or 20A Fuse Would probably be better Link to post Share on other sites
Wege Posted May 30, 2009 Report Share Posted May 30, 2009 are those for constant currents or allow for higher ampage drains that airsoft can allow (as in peak or surge?) Link to post Share on other sites
crackisbad Posted May 30, 2009 Report Share Posted May 30, 2009 If I remember correctly, I think they work on heat, so if there is a small/short peak/surge above the rating it shouldn't flip. But you'll get a better/more reliable answer from someone who didn't almost fail electrics part of physics Link to post Share on other sites
EmptyChambers Posted May 30, 2009 Report Share Posted May 30, 2009 I've run them. If you get current above what its rated for, it'll heat and break the circuit. Let it cool down, and its good to go. Not had any issues with mine, although I've never tripped mine either. Link to post Share on other sites
Noodle_2000 Posted May 31, 2009 Author Report Share Posted May 31, 2009 Hmm.. thanks for the links Crack. But I was wondering if I could probably source one for a bit cheaper.. tried digikey but never could find the right one Link to post Share on other sites
Azulsky Posted June 1, 2009 Report Share Posted June 1, 2009 no resettable switch works fast enough for my tastes, those 20 A ones will take half a minute to switch. Link to post Share on other sites
jomarx Posted June 1, 2009 Report Share Posted June 1, 2009 I use 2 6.5A fuse in parallel (Digikey : MF-RHT650-0-ND) on my mosfet kits. And it should work as a normal fuse replacement. Extreme-Fire also have pre made fuses. Link to post Share on other sites
gzus11 Posted June 1, 2009 Report Share Posted June 1, 2009 i use these from ebay uk polyswitch, Tyco Electronics Manufacturers Part No. RGE1100 Link to post Share on other sites
tome Posted June 1, 2009 Report Share Posted June 1, 2009 yep i use the same as above, though i think i went for a higher "hold current" to minimise the chance of it increasing circuit resistance under normal use. Link to post Share on other sites
Azulsky Posted June 1, 2009 Report Share Posted June 1, 2009 Gonna take a long *albatross* time for the thing to trip which makes it essentially worthless, my guns will have eaten the gears or piston or both by the time the fuse activates. Link to post Share on other sites
jomarx Posted June 2, 2009 Report Share Posted June 2, 2009 Depending on the current drain of your setup, it may/may not trip at the right time. Lower amps rating can also be used. Link to post Share on other sites
Azulsky Posted June 2, 2009 Report Share Posted June 2, 2009 Wasnt happy with anything digikey had. Point being with something that cycles over 20 times per second, none of the poly switches trip fast enough for my liking, especially considering 2 of the guns in my collection are over 35 rps Link to post Share on other sites
jomarx Posted June 2, 2009 Report Share Posted June 2, 2009 On my 23rps 430fps P90, the EVO mosfet (with a very tiny 20A fuse) tripped on me 2 or 3 times already. I think its because my motor was stressed that time... Link to post Share on other sites
tome Posted June 2, 2009 Report Share Posted June 2, 2009 Azulsky, it depends on what people want the fuse to protect. In my setup it's to prevent the wiring and batteries from burning out in the event of a short circuit if the wiring is somehow damaged, rather than trying to stop mechanical damage as a result of a gearbox jam. In that application it's adequate and has tripped once when the cladding on my m4's wiring was accidentally cut and shorted out the battery Link to post Share on other sites
gzus11 Posted June 2, 2009 Report Share Posted June 2, 2009 yup, i use the fuse to protect my batteries more than anything else, then the wiring/motor from turning into blue smoke and fire. the fuse will not save my gearbox, but it will prevent everything else from catching fire from a gearbox failure or battery short. graph looks reasonable time depending on current, 40A trips 7 seconds, where 150A in 0.1 seconds, so depends on a fault current/short current battery can supply. mine are rated for 100-150A discharge. how long does it take a standard fuse to blow? could also select a lower rated switch fuse thing, firing short bursts possibly would be fine, though prolonged full auto would trip out. i chose the ones i did with, 11A hold and 18A trip, as my guns had 10A fuses as standard so just went with that. should get some time on them this weekend, to see if they will last. Link to post Share on other sites
infected Posted June 2, 2009 Report Share Posted June 2, 2009 Wasnt happy with anything digikey had. Point being with something that cycles over 20 times per second, none of the poly switches trip fast enough for my liking, especially considering 2 of the guns in my collection are over 35 rps Which is why I've stayed away from them. I'm looking at testing a few soon, just to see. The thought is if the current is high enough (as it would be with a direct short), it would trip earlier. So I'm still looking into offering them with my mosfet setups. I'll be testing some this week or next. Link to post Share on other sites
Azulsky Posted June 2, 2009 Report Share Posted June 2, 2009 Which is why I've stayed away from them. I'm looking at testing a few soon, just to see. The thought is if the current is high enough (as it would be with a direct short), it would trip earlier. So I'm still looking into offering them with my mosfet setups. I'll be testing some this week or next. Cool do let us know All of my guns are fuseless as of right now, havent suffered a break that would have been prevented by a fuse in a long time. I just say my daily incantations to the mechbox gods Link to post Share on other sites
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