What this part is and what it does
The Siemens SIRIUS 3RT1016-1RB41-0KS0-ZW97 is a 3-pole Size S00 power contactor rated for AC-3 motor switching at 9 A, handling 4 kW at 400 V. The 24 V DC coil pulls in reliably and holds at 3.3 W — a known value for sizing the control transformer or DC supply. Screw terminals on both main and auxiliary circuits make this a straightforward swap in existing panels without retooling for spring-cage terminations. This contactor is built for the SIRIUS modular platform — snap-on mounting onto 35 mm DIN rail per EN 50022, with a 45 mm width that keeps panel fill factor predictable. The Size S00 footprint matches the compact end of the SIRIUS range, so it slots into the same gland-plate layouts as other S00 contactors and overload relays.
Panel fit — does it drop in where a 3RT1015-1BB42 was specified?
The 3RT1016-1RB41-0KS0-ZW97 shares the same Size S00 frame, 45 mm width, and screw-terminal pattern as the 3RT1015-1BB42. Both mount on 35 mm DIN rail with the same 72 mm depth and 57.5 mm height. The main difference is the coil: this part runs on 24 V DC (3.3 W holding), while the 1BB42 uses a 24 V AC coil with 4.4 VA holding power. If the control circuit is DC, this part drops in without rewiring the power side.
Deployment context — where it belongs
This contactor is at home in a control panel switching motor loads — pumps, conveyors, fans — on a 400 V three-phase line. The AC-3 rating of 9 A and 4 kW at 400 V covers small induction motors up to that power. The 24 V DC coil makes it a natural fit in panels with a DC control bus, common in mining and processing plants where the control voltage is kept separate from the AC power for safety. The IP20 finger-safe front and IP20 terminal protection mean it is suitable for enclosed panel mounting only — not for washdown or outdoor exposure. Side-by-side mounting is permitted, and the 6 mm spacing to grounded parts is standard for the S00 frame. The 3-pole main circuit with 1 NC auxiliary contact gives basic feedback for a PLC input.