Panel fit — the dimensions that lock the slot
The 3RA2120-1HA24-0FB4: The 193 mm height and mandatory vertical mounting position mean the enclosure depth must clear the full height without obstruction above or below. Clearance requirements: 50 mm upwards, 20 mm forwards, 20 mm at the side, 10 mm downwards — plan the panel layout around these gaps for airflow and wiring access.
Motor protection — Class 10 trip and AC-3 current
The Class 10 trip curve matches standard induction motor starting profiles: it allows up to 10 seconds of locked-rotor current before the overload opens, which covers most general-purpose motor starts without nuisance tripping. The supplied contactor 3RT2024-1FB40 and link module 3RA2921-1BA00 are pre-assembled — no separate selection of contactor and overload needed for this combination.