The Siemens BQD330 3 Pole 30 Amp 277v Circuit Breaker is a reliable and efficient electrical component suitable for interior use. With a maximum amperage of 30 A and a number of phases of 3, it provides thermal overload protection for added safety. The bolt-on mounting style and screw terminal electrical connection make installation quick and easy. This main breaker from Siemens is designed for AC current type and operates with an on/off method, ensuring seamless power distribution in a variety of industrial and commercial settings.