SIRIUS reversing starter, 6.3 A, Class 10
The 3RK4340-3LR51-1BA0: The control supply is 24 V DC (20.4–26.4 V range), so it drops straight into a standard 24 V control panel without a separate transformer. The IP55 enclosure means it's dust-protected and splash-proof — suitable for standalone mounting on a machine frame or in a panel where washdown isn't direct, but not for submersion.
Mounting and panel fit
Dimensions are 145 mm deep, 182 mm wide, 220 mm tall — a compact footprint for a reversing starter that includes the overload and control electronics in one unit. Mounting position is flexible: you can rotate it ±180° on a vertical surface, and tilt it forward or backward by ±22.5°, which helps when routing cables into a tight enclosure or aligning the starter with a gland plate. Short-circuit protection is designed for circuit breakers upstream — the starter itself doesn't contain fuses, so you'll need a breaker or fuse ahead of it per the Siemens coordination tables.
No UL or CSA listing is stated in the spec record — confirm with your Siemens contact if a specific agency mark is required for your jurisdiction.