10 amp double pole breaker breakdown amperage

A 10-amp double pole breaker is designed to interrupt a maximum of 10 amps of current in each of the two poles. This means that the total maximum current that the breaker can interrupt is:

10 amps (per pole) x 2 poles = 20 amps

So, the breakdown amperage of a 10-amp double pole breaker is 20 amps.