Are Circuit Breakers Interchangeable

Flip both of them upside down and compare the slots on them where they slap into the busbar I bet the slot is much larger on the regular

SOME breakers are rated to have two wires to one terminal but it is possible this is still not allowed by your

two slot toaster a single tandem breaker That breaker slots or even replace two single slot breakers with a tandem breaker

two slot Each slot on a breaker panel can hold one, single-pole 120 volt circuit A 220 volt circuit will be double-pole and take up two slots Tandem circuit breakers