The 3RA2210-1GA15-2AP0 is a Siemens SIRIUS reversing starter, Size S00, built around the 3RT2015-1AP02 contactor and the 3RA1921-1DA00 link module. It integrates forward and reverse contactors, a thermal overload relay, and mechanical interlocking in one assembly — no separate reversing contactor pair to wire. For longer ramp times (centrifuges, high-inertia loads) you would step up to Class 20 or Class 30. The 0.25 kW rating at 50/60 Hz is the minimum motor size the overload can protect.
The 90 mm width and 97 mm depth fit a standard 200 mm deep enclosure with room for the 50 mm upward clearance and 32 mm forward clearance needed for wiring access and heat dissipation. Zero clearance needed at the back; 10 mm at the side and 10 mm downward. Main circuit connections use screw-type terminals — expect a #2 Pozidriv or flathead for the power wiring. Operating range is -20 to +60 °C; storage and transport tolerate -50 to +80 °C.