The Siemens 3RA6250-1EB32 is a SIRIUS compact reversing starter — a single device that combines a reversing contactor and overload relay in one package. Rated 15 kW at 400 V (AC-3 motor duty) and 32 A at 480 V, it handles reversing motor loads like conveyors, hoists, and pumps where direction change is part of the cycle. The adjustable trip class (CLASS 10 or 20) lets you match the overload curve to the motor's starting profile — a tight 10 for short acceleration, or 20 for high-inertia loads that need a longer ramp.
Mounting and wiring in the panel
The 90 mm width takes three standard 18 mm module slots, so it fits a typical motor control centre footprint. Screw-type terminals on the main circuit accept solid conductors from 0.5 to 4 mm² (or two up to 2.5 mm² each), which covers most motor leads in this power class. Depth is 165 mm, height 170 mm — check your enclosure depth if you're retrofitting into a shallow gland plate.
With a breaking capacity of 53 kA at 400 V, this starter can interrupt high fault currents without upstream fuses. That figure is the short-circuit making/breaking capacity per IEC 60947-6-2. For selectivity coordination, pair it with a matching SIRIUS fuse or circuit breaker; the manufacturer publishes coordination tables. The reversing design means two contactor mechanisms interlocked mechanically and electrically — no external interlock relay needed.
Rated for continuous operation from -20 to +60 °C ambient, with storage down to -55 °C. Vibration resistance tested to 20 m/s² (2g) at 5.8–500 Hz, and shock rated at 60 m/s² (6g) — solid for installation near rotating machinery or on mobile equipment.
The part is specified into new designs and available through normal Siemens distribution.