Mounting and panel integration
The 3RA2120-4AE26-0BB4: The main circuit uses spring-loaded terminals, so no torque wrench is needed for the power connections — just strip, insert, and pull to confirm the clamp is engaged. Clearance requirements: 50 mm upwards, 20 mm forwards, 20 mm at the side, 10 mm downwards, and 0 mm backwards — the back can sit flush against the panel wall, which simplifies layout in tight enclosures.
Supplied components and BOM fit
This starter ships with a 3RT2026-2BB40 contactor and a 3RA2921-2AA00 link module pre-assembled — the overload relay is integrated into the S0 frame, so the unit arrives as one orderable assembly, not a kit. The circuit-breaker size is also S0, meaning the entire load feeder shares the same frame size for consistent panel cut-outs and busbar spacing.