Busbar snap-on mounting — panel space constraint
The 3RA2120-4AD26-0AP0: Designed for snapping onto 60 mm busbar systems in a vertical mounting position — this is the defining mechanical fit. The 45 mm width and 155 mm depth let it pack tightly on the busbar, but the 260 mm height means the enclosure depth must clear the full assembly including the contactor and link module. Clearance requirements: 50 mm upwards, 20 mm forwards, 20 mm at the side, 10 mm downwards, and 0 mm backwards — the back of the unit sits flush against the busbar or panel backplane.
What comes in the assembly
This order code ships as a complete direct-on-line starter: it includes the 3RT2026-1AP00 contactor and the 3RA2921-1AA00 link module, pre-assembled and coordinated for the S0 feeder size. The main circuit uses screw-type terminals — no special tooling needed for field wiring.