Reversing starter for compact motor control
The Siemens 3RA2210-1EE15-2BB4 is a SIRIUS reversing starter in size S00, combining two contactors and a mechanical interlock in a single assembly for forward/reverse control of three-phase motors up to 4 A at 400 V AC-3. Rated for AC-3 switching duty up to 690 V maximum, this unit is built for the standard reversing motor control function — two contactors cross-wired with a mechanical interlock that prevents both coils from pulling in simultaneously. The 24 V DC coil (24... 24 V rated value) keeps the control circuit in the low-voltage safety range, which simplifies compliance with machinery directive isolation requirements.
Panel fit and mounting constraints
Mounts on 35 mm DIN rail via the screw-and-snap-on method, or can be screw-mounted directly to a backplate — vertical orientation only, per the mounting position spec. Side clearance is 10 mm on each side; no backward clearance is required, so the unit can sit flush against a rear panel or busbar support.
What the AC-3 rating means for motor sizing
At 400 V AC-3 (the standard motor-switching duty category), this reversing starter is rated 4 A — this is the current it can make and break motor loads under full-load running conditions, not the locked-rotor inrush that the contactor must handle momentarily.
Included components and wiring terminals
This reversing starter ships with the 3RT2015-2BB42 contactor and the 3RA2911-2AA00 link module pre-assembled — the mechanical interlock and power bus connections are factory-integrated, so field wiring is reduced to the control and motor leads. The main current circuit uses spring-loaded terminals (cage-clamp style), which hold solid or ferruled stranded wire without periodic re-torquing — relevant for a maintenance interval on a production line where vibration is present. Operating temperature range is -20 to +60 °C with the same range for temperature compensation; storage and transport limits extend to -50 to +80 °C.
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