The 3RA2120-4AH26-0AP0: This SIRIUS direct-on-line starter is rated 16 A at AC-3 duty at 400 V, which means it switches standard three-phase induction motors up to that full-load current without welding the contacts on inrush. The 690 V rated value covers 480 V and 600 V systems with headroom. At 460/480 V the starter handles 10 hp motors, and at 220/230 V it covers 5 hp — the horsepower ratings align with NEMA standard motor frames, so this is a direct fit for North American panel builds.
S0 size, snap-on busbar mounting — panel integration notes
The S0 load feeder size and 45 mm width mean this starter occupies a single 45 mm slot on a DIN rail or 60 mm busbar system — the snap-on fastening method clips directly onto the busbar without additional brackets. Mounting position is vertical only. Clearance requirements: 50 mm upwards for heat dissipation, 20 mm forwards for door clearance, 10 mm downwards for wiring access, 20 mm at the sides, and 0 mm backwards — it sits flush against the mounting surface. The supplied contactor is 3RT2026-2AP00 and the link module is 3RA2921-2AA00, so the assembly is a matched set from the factory.
Current production — sourcing through authorized distribution
Operating temperature range is -20 to +60 °C, storage and transport range is -50 to +80 °C — suitable for unconditioned warehouses and panel environments without climate control.