Spectra Series Panelboards. Renewal Parts. Circuit Breaker Mounting Modules Plug-In Spectra 3-pole. 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. Circuit breakers not included in module price. Includes all necessary hardware. Maximum Breaker Amperage: 600. Box width range: 40", 44". Height: 4X. 1X = 1 3/8" vertical panel space. Filler Plate Kit product number: AFP3SED.