Reversing starter that snaps onto a 60 mm busbar
The Siemens 3RA2225-1KD24-0AK6 is a SIRIUS non-fused reversing motor starter — size S0 load feeder with a S00 circuit-breaker frame. It ships as a factory-assembled unit with the contactor 3RT2024-1AK60 and link module 3RA2921-1AA00 already integrated. Mounting is the differentiator here: it fastens by snapping onto 60 mm busbar systems, not just DIN rail. That saves panel space and busbar drilling on a reversing starter that already measures 155 mm deep by 90 mm wide by 260 mm tall.
Motor ratings that cover the common voltages
At 480 V it draws 11 A; at 600 V also 11 A — the current ceiling stays flat across the upper voltage range. Trip Class 10 means the thermal overload clears fast enough for standard motor starts — no nuisance tripping on normal acceleration, but it catches a locked rotor before the windings cook. Coil control voltage is 88–121 V at 50 Hz and 96–132 V at 60 Hz — a 110–120 VAC control transformer is the typical match. Ambient operating range is -20 to +60 °C, with storage from -50 to +80 °C.
Current production — no lifecycle worry
The supplied contactor and link module are standard catalog items, so replacement parts are straightforward to source.
Panel fit and clearances
Mounting position is vertical. Clearance requirements: 30 mm upwards, 10 mm forwards, 10 mm downwards, 9 mm at the side, and 0 mm backwards — the back face sits flush against the mounting surface. The 90 mm width means it occupies three standard 30 mm DIN-rail modules, but the busbar snap-on option eliminates the rail entirely. Main contact wire range is 1–10 mm² stranded, or 2x (2.5–6 mm²) for paralleled feeds. Degree of pollution 3 means it's rated for industrial environments with conductive dust or occasional condensation — no derating needed in a typical panel.