What this SIRIUS direct starter delivers
The 3RA2120-1HD24-0AP0 is a Siemens SIRIUS direct-on-line starter, size S0, rated 3 kW at 400 V and 8 A at 480 V in AC-3 duty — the right-sized spec for a pump, fan, or conveyor motor up to that power band. It ships as a pre-assembled unit with a 3RT2024-1AP00 contactor, a thermal bimetallic overload relay (Class 10), a link module, and a busbar adapter for snapping onto 60 mm busbar systems — no separate sourcing of components. The screw-type terminals on the main current circuit keep wiring straightforward for a panel builder, and the vertical mounting position fits standard enclosure layouts.
Ratings that matter for the BOM line
At 400 V, the starter handles 3 000 W; at 480 V it delivers 8 A continuous. Maximum AC-3 switching voltage is 690 V, and the operating frequency covers 50 to 60 Hz, so it fits both 50 Hz European and 60 Hz North American supply systems.
The starter snaps onto 60 mm busbar systems using the included 8US1251-5NT10 busbar adapter — no DIN rail required, which saves rail space in a densely packed panel. Dimensions are 155 mm deep, 45 mm wide, and 260 mm tall. Clearance requirements: 50 mm upward, 20 mm forward, 10 mm downward, and 20 mm at the side — plan the enclosure depth and ventilation accordingly. Operating temperature range is -20 to +60 °C, storage and transport from -50 to +80 °C — the unit handles unheated warehouses and truck shipments without issue.
No stock-holding claim — quoted per order.