Depth is 111 mm, so it needs that much clearance behind the rail for wiring and heat dissipation.
For inductive loads, derate accordingly; the 10 A at 24 V figure gives you headroom for pilot-duty solenoids and relay coils. Contact reliability is specified at one incorrect switching operation per 100 million cycles at 17 V, 1 mA — a dry-circuit rating that tells you the contacts are gold-flashed or similarly treated for low-level signal switching. If you're switching PLC inputs or sensor signals at milliamps, this contactor handles it without the oxidation problems that plague unplated contacts. That's the life of the mechanism before wear-out, not the electrical life at full load — at rated current you'll see fewer cycles, but the mechanical figure gives you the ceiling for maintenance planning. Shock resistance is 10g for 5 ms and 5g for 10 ms — fine for most industrial machinery but not for high-vibration applications like hammer mills without additional damping.
Solid conductors accepted: 2x 0.5 to 1.5 mm², 2x 0.75 to 2.5 mm², and 2x 4 mm². That's two conductors per terminal for the smaller gauges, which helps when you need to loop through or parallel a control circuit. The 4 mm² single-conductor capacity covers most control-power feeds.
RoHS compliance is indicated by the substance prohibition date of July 1, 2006, covering the standard EU RoHS directive.