The Siemens 3RA2115-0AE15-1EG6 is a SIRIUS direct on-line starter, size S00 — a factory-assembled combination of a contactor, a circuit breaker, and a link module, all pre-configured for motor starting and overload protection. It ships with the supplied contactor 3RT2015-2EG61, the supplied circuit breaker 3RV2011-0AA25, and the supplied link module 3RA2911-2AA00, so the coordination between the three devices is already engineered — no separate sizing or wiring of the overload relay against the breaker. The AC-3 rating goes up to 690 V maximum, covering the common 400 V motor circuits in European panels.
Mounts by screw or snap-on onto 35 mm standard mounting rail, vertical position only — the 45 mm width, 198 mm height, and 155 mm depth are the S00 footprint, so it occupies a single 45 mm wide slot on the DIN rail. Clearance requirements: 50 mm upwards, 20 mm forwards, 20 mm at the side, 10 mm downwards, and 0 mm backwards — the zero backwards clearance means it can sit flush against the back panel or a rear wiring duct. Main circuit connections use spring-loaded terminals; auxiliary and control circuits also use spring-loaded terminals — no screw torque to verify, just strip and insert.