22 A reversing starter, S0 frame, Class 10
The 3RA2220-4CF27-0BB4: That AC-3 rating means it switches squirrel-cage motors up to 22 A on starting and running — the Class 10 trip curve clears a stalled rotor before the winding insulation reaches its thermal limit, so it protects motors that accelerate in under 10 seconds. The maximum operating voltage is 690 V AC-3, and the unit ships with a 3RT2027-2BB40 contactor and a 3RA2921-2AA00 link module — the kit is complete for a reversing motor branch, no separate contactor or interlock wiring to source.
Mounting and wiring — DIN rail, spring terminals
Mounts on a 35 mm DIN rail via the supplied adapter for screw or snap-on fastening. The mounting position is vertical, and the clearance requirements are: 50 mm upwards, 32 mm forwards, 10 mm downwards, 10 mm at the side, and 0 mm backwards — plan the enclosure depth and rail spacing accordingly. Main power circuit connections use spring-loaded terminals — no screw torque to verify, just strip and insert. The coil is rated 24 V. Overall dimensions: 130 mm deep, 90 mm wide, 269 mm tall.
Ambient limits and compliance
Operating temperature range is -20 to +60 °C; storage and transport range is -50 to +80 °C. The substance prohibitance date is 10/01/2009, indicating RoHS compliance per the EU directive effective date.