Im building a quadrocopter, so that's why im going to be using such a big power supply (for the tests, autonomic power supply will be a LiPo 3S - my 4 motors draw up to 20A current each). What kind of countermeasure should I include on my PCB to protect it, in case i make a short while soldering, or there will be a design flaw. The uC+step down regulator+gyro+esp wifi module shouldnt require more than 1 A (probably even less than 500mA).
Varistors and transils wont work because its not voltage thats going to be too big. Fuse/circuit breaker will probably be too slow.
So what should I use in this case.