The Square D QO tandem circuit breakers are a perfect low cost solution if you need to add an extra circuit when your main panel is full. Adding tandem breakers double the number of circuits in a panel. When it comes to electrical protection, fast response is critical and QO Circuit Breakers can trip faster than the blink of an eye. The exclusive QO Visi-Trip instantly identifies a tripped circuit breaker with a red indicator window. The Visi-Trip reduces the number of call backs, as well as the chance that other circuits will be turned off accidentally. This breaker will work only in Square D branded residential panels. Provides overload and short circuit protection (120Vac). Exclusive Visi-Trip red indicator10,000 Amperes Interrupting Rating (AIR). Features two 1-Pole breakers (30A / 15A) in the space of a 1-Pole QO® breaker. HACR type for use with air conditioning, heating and refrigeration equipment having motor group combinations and marked for use with HACR type circuit breakers.