The 3RA2220-4CD27-0BB4: That 11 kW figure is the motor output the starter handles under standard starting conditions — the Class 10 trip characteristic means it protects against overload without nuisance tripping during normal acceleration (cite:). The 24 V DC coil keeps control circuits at safe extra-low voltage, common in PLC-driven panels where the I/O rail is 24 V (cite:).
Mounting and integration — snaps onto 60 mm busbar systems
This reversing starter is designed for snapping onto 60 mm busbar systems, not DIN rail — the busbar adapter 8US1251-5NT10 is supplied in the assembly (cite:,). Mounting position is vertical only (cite:). Dimensions are 260 mm height, 90 mm width, 165 mm depth (cite:,). Clearance requirements: 50 mm upward, 32 mm forward, 10 mm downward, 10 mm at the side, 0 mm backward (cite:,).
What's inside the assembly — supplied sub-components
The 3RA2220-4CD27-0BB4 ships as a complete reversing starter with the contactor 3RT2027-1BB40, link module 3RA2921-1BA00, circuit-breakers 3RV2021-4CA10, busbar adapter 8US1251-5NT10, and RS assembly kit 8US1250-5AT10 (cite:,). The overload release is thermal bimetallic with a magnetic short-circuit trip — standard motor protection coordination for a reversing application where the load can run in either direction (cite:,). Operating temperature range is -20 to +60 °C, with storage and transport range -50 to +80 °C (cite:,).