Vigo - I doubt they will handle 320 amps for more than a millisecond
, but for 10 - 20 amps I think they are OK. They are probably copies of Hobbywing's Quicrun which I have used.
If you only need 5 - 10 amps, then these are OK. I've used lots in my smaller models - up to 385 motor
There are various versions claiming from 10 to 30 amps (which I doubt) but for low amps they are fine. There are several versions with and without brake, which is usually switchable, and from UK and Chinese suppliers.
Like Vipers, they have a BEC, and I have found that the switch actually isolates the battery, saving another switch - although do check as there are many versions