Battery in Trunk Wiring That Exceeds NHRA Requirements

I think the question on the breaker is what voltage is that 60amp rating at? If it's at 48V, won't it trip at a much higher amperage at only 12 volts? Or is the voltage independent of the current rating??
I'm thinking that if there is a different amp rating for any given voltage (12 through 48), it would be given in the specs for the breaker.

But like you, I don't know, and I should.

I hope @crackedback or someone with a good understanding can enlighten us.