Motor starter for 4 A loads — what the ratings mean on the line
The 3RK4340-3JR51-0BA0: The IP55 enclosure keeps out dust and low-pressure water jets, so this starter can be mounted in a control panel or directly on a machine frame in a factory environment without a separate enclosure.
Control voltage and mounting — what fits the panel
The control supply is 20.4 to 26.4 V DC — a standard 24 V DC control bus works within that window. The operating voltage for the main circuit is 340 to 440 V AC at 50 or 60 Hz, covering 400 V nominal supplies with typical tolerance. Dimensions are 182 mm wide, 220 mm high, 145 mm deep — the width is the key panel-space number when laying out a row of starters. The starter has no integrated bus communication (no PROFINET, PROFIBUS, or AS-Interface), so it's a standalone I/O-controlled unit.
Sourcing and lifecycle — current production, quoted to order
No UL or CSA listing is explicitly stated in the spec record, but the IEC design and CE marking are standard for this SIRIUS series.