The Siemens BL Circuit Breaker is a panelboard mounted, non interchangeable trip molded case circuit breaker available in 10 125A, 1 , 2 , and 3 pole. Available in 10KAIC, 22KAIC and 65KAIC interrupting ratings. Also, available are arc fault, ground fault and switching neutral breakers. Siemens strongly recommends against the use of used breakers. The installation of used breakers in a Siemens panel will void the warranty on the panel. Siemens does not sell used breakers and has not approved any 3rd party sellers to do so.