What it is and what it does
The Siemens SIRIUS 3RT1015-1AP01-ZW97 is a size S00 power contactor, part of the SIRIUS family, designed for switching motor loads and resistive loads in control panels. It mounts via screw or snap-on onto a 35 mm DIN rail per EN 50022, and its 45 mm width fits standard panel layouts. Rated for AC-2 duty at 3 kW on a 400 V supply, this contactor handles slip-ring motor starting and reversing. The AC-4 rating of 6.5 A at 400 V covers plugging and inching duty cycles, while the AC-12 rating of 10 A covers resistive loads like heaters. The IP20 front protection means it's suited for enclosed panel use where tools or fingers won't contact live parts during operation. Pollution degree 3 allows it in industrial environments with conductive dust or occasional condensation.
Lifecycle and sourcing reality
The ZW97 suffix indicates a special version — likely a customer-specific variant or a non-standard packaging. Confirm with your Siemens contact that the standard 3RT1015-1AP01 (without suffix) is a drop-in replacement if the ZW97 features aren't required for your application.
Terminal and wiring details
Main circuit connections use screw-type terminals accepting 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or a maximum of 2x (0.75 to 4 mm²) solid or stranded conductors. AWG equivalents are 2x (20 to 16), 2x (18 to 14), or 1x 12. The depth of 72 mm leaves room for wiring ducts in the panel. For short-circuit coordination, a Type 2 assignment requires a gL/gG fuse rated 20 A, while Type 1 coordination allows up to 35 A. Side-by-side mounting is supported without derating, which simplifies multi-contactor groups.
Environmental limits and endurance
Operating temperature spans -25 °C to +60 °C, covering most indoor industrial environments. The maximum operating altitude is 2,000 m without derating. Mechanical endurance is rated at 30 million operations typical, which suits high-cycle applications like conveyor systems or shuttle cranes. At 50 Hz the coil operates at 0.8 to 1.1 times rated voltage; at 60 Hz the range is 0.85 to 1.1. This gives a wider pickup tolerance at 50 Hz, useful if line voltage sags are common.