The QO2100 Square D Plug-on 100amp Breaker (A) is a high-quality circuit breaker designed for industrial and commercial electrical systems. With a maximum amperage of 100A and voltage of 120/240, this breaker is suitable for handling heavy electrical loads. The plug-on feature makes installation quick and easy, while the QO brand ensures reliability and durability. It comes in a 2-phase design and is a popular choice among electrical professionals for its performance and efficiency.