8 A AC-3 motor current, Class 10 — what it means for your load
The 3RA2120-1HD24-0BB4: That 8 A figure is the motor-switching current — it's what drives contactor and overload sizing for a standard squirrel-cage motor under full load. For a motor that's hard to start (high inertia loads like a crusher or centrifuge), you'd want Class 20 or 30 — Class 10 is for normal-starting loads like pumps and fans.
Snap-on mounting and panel fit
This starter is designed to snap directly onto 60 mm busbar systems — no DIN rail adapter needed. The 45 mm width means it fits the standard S0 feeder footprint, and the vertical mounting position is required for proper thermal performance. Clearance distances: 50 mm upwards, 20 mm forwards, 0 mm backwards, 10 mm downwards, and 20 mm at the side. That backwards clearance of zero means you can mount it flush against the back panel — helpful when you're squeezing into a shallow enclosure.
Supplied components — what's in the box
The starter ships with a 3RT2024-1BB40 contactor and a 3RA2921-1BA00 link module already integrated.