What the ratings mean for fit
The 3RT1034-1AR60-ZW95 is a SIRIUS S2-frame power contactor from Siemens, designed for switching motor loads in control panels. Its AC-2 rating at 400 V — 15 kW — covers wound-rotor motors and moderate-duty starting where the contactor makes and breaks under load. For AC-3 (squirrel-cage) duty, the same frame handles higher currents; the AC-2 figure is the one that governs slip-ring or crane-duty applications. The contactor mounts via screw or snap-on onto 35 mm DIN rail per EN 50022, so it drops into any standard panel layout without adapter plates. Screw-type terminals on the main circuit accept stranded conductors up to 2x 25 mm², and the auxiliary circuit accepts solid wire from 0.5 mm² up to 4 mm². That covers most control wiring in a 400 V panel — no need for ferrule adapters on the main power legs. The contactor is rated for side-by-side mounting with no derating, which saves rail space when grouping multiple contactors in a motor control centre. Front-side IP20 protection means the contactor is touch-safe once installed in an enclosure; the terminal area is IP00, so live parts are exposed during wiring and the panel door must interlock or be kept locked. Operating temperature spans -25 to +60 °C, storage from -55 to +80 °C — fine for most industrial environments, including unheated warehouses.
Switching performance and coil data
The contactor is rated for 50/60 Hz operation with a voltage tolerance of 0.8...1.1 x rated at 50 Hz and 0.85...1.1 at 60 Hz. Arcing time sits at 10...15 ms, with an AC pickup/dropout time of 7...20 ms. Maximum switching rates vary by duty: 1200 cycles/hour at AC-1 (resistive), 1000 at AC-3, 750 at AC-2, and 250 at AC-4 (plugging/inching). The auxiliary contact block — rated 10 A at 24 V, 6 A at 230 V, 3 A at 400 V — covers control-circuit signalling and interlocking without an add-on module for most applications.