Panel fit and wiring constraints
The 3RT2316-2BM40 is a Size S00 SIRIUS contactor with a 220 V DC coil, rated for 9 A at 400 V AC-3 duty — that's a 4 kW motor switching capability. Spring-loaded terminals on both the main and auxiliary circuits, accepting 2x (0.5... 2.5 mm²) solid or 2x (0.5... 4 mm²) stranded. That 45 mm width and 70 mm height footprint is tight for a 4 kW contactor — useful when you're stacking multiple contactors in a row on a DIN rail. Coil hold-in is DC, so verify your control supply is clean 220 VDC — dropout characteristics aren't specified here, but the arcing time of 10... 15 ms and the DC operate time of 7... 13 ms give you a window for timing coordination in the control circuit. The 4.4 W power dissipation at AC in hot operating state means the coil won't cook adjacent wiring in a crowded enclosure, but side-by-side mounting still needs that 6 mm gap for airflow.
Mechanical endurance and environmental range
Auxiliary contact capacity and impulse ratings
Accepts up to 2 attachable auxiliary contact blocks. Both main and auxiliary circuits are rated for 6 kV impulse withstand — that's the standard for industrial control panels per IEC 60947. Auxiliary contacts accept AWG 20... 12, same as the main contacts. The full-scale value of 1.1 and initial value of 0.8 likely refer to thermal overload relay settings or pickup/dropout ratios — worth noting if you're pairing this with a 3RU2 or 3RB3 overload relay.