Siemens 3RT2016-1BB41-ZW96 SIRIUS Power Contactor
The 24 VDC coil pulls in at 0.8 x rated voltage (19.2 V) and drops out around 0.1 x rated voltage (2.4 V), giving a solid hold-in range for control circuits with some brownout margin. Main contact ratings: 10 A at 24 V DC, 3 A at 400 V AC, and 1 hp at 230 V AC. Switching frequency: up to 1,000 cycles/hour for AC-1 (resistive), 750 cycles/hour for AC-3 (motor), and 250 cycles/hour for AC-4 (plugging/reversing). The AC-3e rating matches the AC-3 figure at 750 cycles/hour. Wire range: solid or stranded 0.5 to 4 mm², with two-wire combinations up to 2x 4 mm². Screw terminals are the standard for this size. Arcing time 10 to 15 ms, DC switching time 7 to 13 ms — fast enough for most interlocking and safety circuits.
Wire the coil with 24 VDC nominal; the screw terminals accept up to 4 mm². The auxiliary switch is integrated, so plan one NO/NC feedback pair into your control logic.