The Siemens 3RA2110-0KD15-1AP0 is a SIRIUS direct (on-line) starter, size S00 — a factory-assembled combination of a contactor, a thermal (bimetallic) overload relay, and a link module, pre-configured for snapping onto 60 mm busbar systems. It switches motor loads up to 690 V AC-3 with a CLASS 10 trip characteristic, meaning it will trip within 10 seconds at 7.2× the thermal setting — fast enough to protect standard squirrel-cage induction motors during stall or jam conditions without nuisance tripping on normal starts. Rated operating frequency is 50 … 60 Hz, and the control coil is specified for 230 V AC at both 50 and 60 Hz.
Snaps directly onto 60 mm busbar systems — no extra adapter plate needed for standard panel layouts. Mounting position is vertical only. Clearance requirements: 50 mm upwards, 20 mm forwards, 10 mm downwards, 20 mm at the side, and 0 mm backwards — the back sits flush against the busbar. This matters when you're packing multiple S00 feeders side-by-side in a motor control centre.
The supplied contactor is 3RT2015-1AP01, the link module is 3RA1921-1DA00, and the busbar adapter is 8US1251-5DS10 — these sub-components are individually orderable for field service replacements.