Siemens Q115AF 15-Amp 1 Pole 120-Volt Arc Fault Circuit Interrupter
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 branch feeder type AFCI is for use in areas enforcing the 2002 and 2005 National Electric Code.  Check with your local electrical inspector to confirm.