Spectra Series Panelboards. Renewal Parts. Circuit Breaker Mounting Modules Plug-In Spectra? 3-pole. Mounting Hardware. Use to mount main or branch circuit breakers into panelboard. Breakers bolt on to the mounting modules. FP suffix indicates that all AFP filler plates, with cutouts for handles, are included to fit all applicable box widths. On double branch modules, filler plates to cover any unused breaker poles are also included. SE and SF breakers located adjacent to a fusible switch, PCU or TVSS require mounting modules suitable for mounting ?Adjacent to Switch.?. SGDA circuit breaker rated 400 amps maximum. Circuit breakers not included in module price. Includes all necessary hardware. Breaker Frame - SFHA or SFLA or SFPA. Maximum Breaker Amperage - 250A. 3 Pole.