Breaker panels are identified by the amount of amperage they provide. For example, a breaker panel of 100 amps will only allow 100 amps of electricity to flow through it without tripping. Theyâre also identified by the number of circuits they accommodate. For example, a 150-amp, 30-circuit panel can handle 150 amps of electricity with room for 30 circuit breakers. â¢ When replacing your panel youâll want to match the amperage capacity of your current model, or if your. power needs have grown, upgrade to the capacity you need.