SIRIUS 3RA2125-1HD24-0AK6 — Non-Fused Motor Starter, S0, Class 10, 7.92 A at 480 V
The Siemens 3RA2125-1HD24-0AK6 is a SIRIUS non-fused motor starter in the S0 size, configured as a direct starter. It ships with a 3RT2024-1AK60 contactor and a 3RA2921-1AA00 link module, plus a thermal bimetallic overload relay. Rated for 690 V maximum at AC-3 duty, the 3RA2125-1HD24-0AK6 delivers 7.92 A at 480 V and 6.33 A at 600 V. It handles motor loads up to 5 hp at 460/480 V and 5 hp at 575/600 V, making it a direct fit for 480 V and 600 V North American line voltages. The 690 V ceiling also covers European 400 V systems with headroom.
This starter snaps directly onto 60 mm busbar systems — no separate mounting plate needed. The vertical mounting position is specified; the unit occupies 45 mm width, 260 mm height, and 155 mm depth. Clearance requirements: 30 mm upward, 10 mm forward, 10 mm downward, 9 mm at the side, and 0 mm backward. That 0 mm backward clearance means it can sit flush against a panel backplane, saving enclosure depth. The S0 load feeder size and S00 circuit-breaker size are a matched pair — the overload relay and contactor are coordinated for the S0 frame. Main contact wiring accepts 1 to 10 mm² stranded, or 2x (2.5 to 6 mm²).
Lifecycle and Sourcing — Current Production
The SIRIUS 3RA2 family is widely stocked across the supply chain, but lead times can vary by region and batch size — a quick quote request is the cleanest path to a firm commit for your BOM line.