What this part is and what it does
The Siemens SIRIUS 3RT1015-2AP02-ZX95 is a size S00 power contactor, the smallest frame in the SIRIUS family, designed for switching motor loads in control panels. Its 3 kW rating at AC-2 duty on 400 V covers standard squirrel-cage motors for conveyors, pumps, and fans where starting current is moderate. The AC-4 rating of 6.5 A at 400 V handles reversing or inching duty with higher electrical wear. Termination is via spring-loaded terminals on the main circuit, accepting 2x (0.25 to 2.5 mm²) solid or stranded wire. This speeds panel wiring and resists loosening under vibration compared to screw clamps. The contactor snaps onto a 35 mm DIN rail per EN 50022, occupying 45 mm of rail width.
Key ratings and what they mean for your BOM
The AC-2 rating of 3 kW at 400 V is the load-bearing spec for motor switching — it defines the contactor's ability to make and break starting currents for wound-rotor or slip-ring motors. For across-the-line starting of standard cage motors, the AC-3 rating (not separately listed here but implied by the S00 frame) typically runs higher; the AC-4 figure of 6.5 A at 400 V governs plugging and inching cycles where contact wear accelerates. For DC switching, the contactor is rated 10 A at 24 V and 0.3 A at 220 V (DC-13 duty), covering solenoid and brake loads. The 30 million mechanical cycles typical life means this part outlasts most panel rebuild cycles in normal use. Type 2 coordination requires a 20 A gL/gG fuse upstream; Type 1 coordination allows a 35 A fuse. This affects your short-circuit protection scheme and panel selectivity study.
Panel integration notes
At 45 mm wide and 73 mm deep, the S00 frame fits standard enclosures. Side-by-side mounting is permitted without derating. Operating temperature range is -25 to +60 °C. Pollution degree 3 rating suits controlled environments with conductive pollution.