SIEMENS AFCI plug in circuit breakers are intended for use in SIEMENS EQ, SIEMENS Ultimate, ITE, and Gould load centers or meter combinations. The single pole SIEMENS breakers may be used in single or 3-phase load centers and are 120V rated. To ensure the warranty on a SIEMENS panel is not voided, the use of SIEMENS breakers is required. The combination type AFCI is for use in areas enforcing the 2008 or newer National Electric Code. Check with your local electrical inspector to confirm.
Arc fault-combo breakers detect 3 different types of arc faults
Line to neutral is caused by a damaged supply cord that may damage the insulation and conductors inside
Line to ground - a nail driven to hang a picture can easily penetrate the insulation of wire
Series arc fault is caused by the screw terminal that connects a wire to a receptacle that may become loose as the receptacle is pushed back into the work box