What This Contactor Is and Where It Fits
The Siemens SIRIUS 3RT1034-1AL00-ZX95 is a Size S2 power contactor for switching motor loads in control panels. It mounts via screw and snap-on onto 35 mm standard DIN rail per DIN EN 50022, with a 55 mm wide footprint that fits standard panel gland-plate layouts. Screw-type terminals on the main current circuit accept solid conductors up to 2x 4 mm² or stranded up to 2x 25 mm².
Motor Switching Ratings — What the Duty Classes Mean
Rated 15 kW at AC-2 duty at 400 V, this contactor handles slip-ring motor starting where the load current stays below make/break stress. For AC-4 duty (plugging, inching, reversing) at 400 V, it carries 29 A — the more severe switching class that governs contact life under frequent reversals. The AC-3 maximum operating rate of 1,000 cycles per hour suits conveyor and pump cycling, while AC-4 maxes at 250 cycles per hour due to the heavier arc stress.
Environmental and Mounting Constraints
Operates from -25 to +60 °C, stores from -55 to +80 °C. Pollution degree 3 means it's rated for industrial atmospheres with conductive contamination — no conformal coating required for typical panel environments. Side-by-side mounting is permitted, so multiple contactors can pack tightly on the rail without derating for heat buildup.
Compliance and Documentation
Substance prohibitance dated 05/01/2012 aligns with RoHS and REACH compliance timelines. The SIRIUS series carries IEC and UL certifications for global panel acceptance, though specific agency marks are not listed in this record.