What this SIRIUS direct starter packs in the S00 frame
The 3RA2110-1DE15-1AP0 is a Siemens SIRIUS direct-on-line starter in the size S00 footprint — the smallest load feeder frame in the SIRIUS family, built for motors up to about 1.5 hp at 480 V. It ships as a factory-assembled unit with the 3RT2015-2AP01 contactor and the 3RA2911-2AA00 link module, so the thermal bimetallic overload relay (Class 10 trip) is already wired into the power circuit — no separate assembly on the rail. Rated 690 V in AC-3 duty, it handles the common 400 V and 480 V motor control panels across European and North American line voltages without a derating step.
Panel fit and wiring — the S00 mechanical envelope
Clearance needs: 50 mm above, 20 mm in front, 10 mm below, and 20 mm at the sides; zero clearance behind the unit because the cooling path is through the front and side vents, not the rear. Main circuit wiring uses spring-loaded terminals — no screw torque to verify, no vibration loosening over time, and faster termination for the panel builder.
Thermal overload and trip class — what Class 10 means for the motor
The thermal element compensates across the -20 to +60 °C operating range, so the trip point stays stable whether the panel is in a cold warehouse or a warm machine room. At 480 V the rated current is 3.2 A, which corresponds to a 1.5 hp motor at 460/480 V — a common NEMA frame size for small pumps, fans, and conveyors.