What it is and what it does
The Siemens SIRIUS 3RT1015-2BB41-ZW97 is a size S00 power contactor with a 24 VDC magnet coil, designed for switching motor and resistive loads in control panels. It mounts via screw or snap-on onto a 35 mm DIN rail per EN 50022, so it integrates into standard panel layouts without adapters. The main current circuit uses spring-loaded terminals accepting 2x (0.25... 2.5 mm²) solid or stranded wire, which speeds wiring and resists loosening under vibration compared to screw clamps.
Key ratings and what they mean for fit
Rated for 10 A maximum in AC-12 duty (resistive loads at line frequency) and 3 kW at 400 V in AC-3 duty (squirrel-cage motors), so it handles small pumps, fans, and conveyors up to about 4 kW at 690 V. For DC switching at 24 V it carries 10 A, dropping to 2 A at 60 V and 0.3 A at 220 V — the inductive DC curve is steep, so verify your load's time constant against the listed points. The magnet coil draws 3.3 W on closing and 3.3 W holding — a constant-grip DC coil that doesn't need a separate economizer circuit. Operating temperature range is -25 to +60 °C, with pollution degree 3 (conductive pollution, typical for industrial enclosures without climate control). Mechanical life is typical 30 million operations, so it outlasts most machines it will ever control. Side-by-side mounting is permitted with a 6 mm gap at the side, keeping panel fill factor manageable.
Sourcing and lifecycle reality
The -ZW97 suffix indicates a special version. If your BOM calls for the base 3RT1015-2BB41, confirm the -ZW97 is an acceptable substitute — the functional ratings are identical to the standard catalog part.
Panel integration notes
Dimensions are 45 mm wide, 60 mm tall, 73 mm deep — fits a standard S00 footprint. Front face is IP20, so it's protected against finger contact but not washdown; mount inside a sealed enclosure for wet or dusty environments. Type 1 coordination requires a 35 A gL/gG fuse; Type 2 coordination needs a 20 A gL/gG fuse. That's the short-circuit protection rating for the main contacts — size your branch circuit protection accordingly.