What this contactor is and where it lands
The Siemens 3RT2016-1BM42 is a SIRIUS power contactor in the Size S00 frame — the smallest in the SIRIUS family, meant for switching motor loads and resistive loads inside a control panel. It mounts on a 35 mm DIN rail per EN 60715, with screw and snap-on fastening, so it drops into a standard panel layout without extra brackets. The screw-type coil terminals are what you see here; no spring-cage option on this order code. At 45 mm wide, 58 mm tall, and 73 mm deep, it fits the S00 footprint — tight enough for a crowded DIN rail but still leaves room for wiring. Clearance requirements are 10 mm upwards, forwards, and downwards, and 6 mm at the side, so you can pack it next to other S00 devices without extra spacing.
Switching ratings — what they mean for your load
The contactor's main contacts are rated for 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, and 3 A at 400 V. At 230 V it carries a 1 hp motor load — that's the figure you'd use for a small pump or fan. These are the DC-13 / AC-15 auxiliary contact ratings, so they govern the control-circuit switching, not the main power path. The main contact range is listed as 20 to 12, which likely refers to the wire size range for the main power terminals.
Wiring and environment
Terminals accept solid or stranded wire from 0.5 to 4 mm², and twin-wire terminations are supported: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm². That covers most control-circuit wiring in a panel — no need for ferrules on solid wire, but stranded should be ferruled for reliable contact under the screw. Operating temperature range is -25 to +60 °C, storage from -55 to +80 °C. The mounting position is flexible: ±180° rotation on a vertical surface, and can be tilted forward/backward by ±22.5° — useful if the panel layout forces an odd angle. Arcing time is 10 to 15 ms, and DC dropout (coil release) takes 7 to 13 ms, which matters for timing in safety circuits.