The 3BBR50000047972P01: The R10 frame sets the physical footprint — mounting hole pattern, bus bar spacing, and gland plate layout are all keyed to this size. If you're swapping into an existing cabinet, verify the R10 cutout matches your backplate; the R10 is a larger frame, so it needs the corresponding clearances for airflow and cable bending radius.
Sourcing posture
Active lifecycle stage.