S0 reversing starter, 8 A AC-3, spring terminals
The 3RA2220-1HF24-0BB4: The CLASS 10 trip characteristic means it disconnects within 10 seconds at 600 % of the thermal setting, matching standard motor start profiles without nuisance tripping. This is a factory-assembled unit: it ships with the 3RT2024-2BB40 contactor and the 3RA2921-2AA00 link module pre-wired. The main circuit terminates via spring-loaded terminals, so no torque driver is needed for the power connections — a time saver on repetitive panel builds.
Panel fit — dimensions and mounting
The starter measures 130 mm deep by 90 mm wide by 269 mm tall. It mounts vertically on a 35 mm DIN rail via the supplied adapter, which also accepts screw fixing for non-rail backplates. Clearance requirements: 50 mm above, 32 mm in front, 10 mm sideways, and 10 mm below — zero clearance needed behind the unit.