Siemens FXD63B150, Siemens Low Voltage Sentron Molded Case Circuit Breaker With Thermal - Magnetictrip Unit. Assembled Standard 40 Deg C Breaker Fd Frame With Standard Breaking Capacity. 150A 3-Pole (22Kaic At 600V) (35Kaic At 480V). Non-Interchangeable Trip Unit. Special Features No Lugs Installed. Dimensions (W X H X D) In 4.50 X 9.5X 4.00.