Panel integration and fit
The 3RV1955-2AA0: This accessory mounts on the front of a size 3RV13 5 device. It is not a standalone component — it bolts onto the breaker or starter to bring the cable connection point forward. The 6-unit pack covers a full set for a multi-pole assembly. No DIN rail mounting is involved; the base device snaps onto the rail, and this adapter adds to its front face. Verify that your enclosure depth accommodates the added forward projection before panel layout.