[Kevin Sevcik]

Originally Posted by techhelpbb

Just wanted to add this...when I get a chance I'll test my other idea...not that what I am about to post here is anything magical as it's basically similar to what's on the robot already...but something to consider as it would seem faster and designed for precisely the sort of protection we are talking about.

http://circuitprotection.ru/upload/p...04-Hbridge.pdf

Costs about $5.50 in small quantity:
http://www.mouser.com/ProductDetail/...9dFfZLyw%3d%3d

Your mouser link is to a 36V, 30A PTC. If you'd bothered to look at the data sheet, you'd notice that that particular device has a trip current of 50A. That's potentially a recipe for annoyance with the way we use Jags. Not to mention that the time to trip at 100A is a blistering (literally) 4.5 seconds. I regret to inform you that the 40A breaker you already have to have in circuit is going to trip faster than that PTC, in 0.8-1.8 seconds.