It mounts on 35 mm DIN rail per DIN EN 50022, using either screw fixing or snap-on — the width is 55 mm and depth 115 mm, so it fits a standard 55 mm-wide DIN slot with room for side-by-side mounting without derating.
The 3RT5034-1AR60 is rated for AC-3e duty at 690 V maximum, which is the standard category for squirrel-cage motor starting — switching during running, not stall or inching. The AC-1 resistive load maximum is 1200 operations per hour, while AC-3 motor duty maxes at 1000 ops/h and AC-4 (plugging/reversing) drops to 250 ops/h. That spread tells you this contactor is designed for normal motor start/stop cycles, not high-inertia reversing applications where you'd need a larger frame or a dedicated reversing contactor.
Coil data and wiring
The coil draws 6 A at 24 V rated value, 6 A at 230 V, and 3 A at 400 V — these are inrush or holding currents depending on the AC/DC variant (the 3RT5034-1AR60 uses an AC coil). Terminal wiring accepts 2x (0.75 to 16 mm²) solid or stranded, or 2x AWG 18 to 2. At 40 °C ambient the minimum permissible conductor is 16 mm²; at 60 °C it's 10 mm². That derating matters if you're running the contactor near its thermal limit in a crowded panel.
Mounting flexibility
That gives panel builders flexibility for tight enclosures or angled sub-panels.