The 3RA1210-1BA15-0AT6: The S00 frame size is the smallest in the SIRIUS contactor family, designed for motor loads up to about 0.75 kW at 400 V. The 1.4 A rating at 600 VAC tells you this starter is sized for fractional-horsepower motors or small resistive loads. The reversing configuration means two contactors are mechanically interlocked inside the same housing, so you get forward/reverse control without external interlocking wiring.

Siemens 3RA1210-1BA15-0AT6 Reversing Starter, S00, 600 VAC
Siemens SIRIUS 3RA12 reversing starter, S00 frame, 600 VAC, 1.4 A, panel-mount, current lifecycle stage.
Product details
Frequently asked questions
What is the difference between Siemens 3RA12 and 3RA13?
The 3RA12 series are reversing starters with mechanical interlock built in, while the 3RA13 series are non-reversing starters. Both share the same S00 frame size and contactor platform, so auxiliary modules and overload relays are interchangeable between them.
Is 3RA1210-1BA15-0AT6 compatible with Siemens 3RT20 contactors?
The 3RA1210-1BA15-0AT6 is a complete reversing starter assembly built on the SIRIUS platform. It uses the same contactor interface as the 3RT20 series, so auxiliary contact blocks, surge suppressors, and busbar systems from the 3RT20 family fit directly.