The AF31SP is a panel board front trim from the A Series, sized 31-1/2" x 20", designed for surface mounting with a door-within-door configuration. It serves as the finished front cover and door assembly for an A Series panel board enclosure — the part that faces the operator and provides access to breakers or controls inside. Surface mounting means the trim attaches directly to the front of a flush or surface-mounted enclosure, not recessed into a wall. The door-within-door feature gives a smaller access panel inside the main door, useful for isolating operator controls from the main breaker compartment.
Surface mounting: the trim fastens over the enclosure front with screws or clips (not supplied). Verify the enclosure's cutout or mounting hole pattern matches the 31-1/2" x 20" trim dimensions before ordering — this is a finished trim, not a bare door. The door-within-door design adds a secondary hinged access panel. When specifying, confirm that the inner door swing clears any panel-mounted devices (meters, switches) on the main door.