What it is and where it lands
The Siemens 3RT2035-1NF30 is a SIRIUS power contactor in size S2, built for switching motor loads and resistive loads inside control panels. It snaps onto a 35 mm DIN rail per DIN EN 60715 or screws directly to a mounting plate, with the mounting position flexible enough to rotate ±180° or tilt ±22.5° on a vertical surface. The main contact block is configured 18...1 — three normally-open power poles plus one normally-open auxiliary contact built in. An auxiliary switch is present, and the coil terminals are screw-type, accepting 2x (0.5...1.5 mm²) or 2x (0.75...2.5 mm²) solid or stranded wire.
Coil and switching performance
The coil is rated for a control supply voltage of 83...155 V, drawing 2 VA at both 50 Hz and 60 Hz. Inrush current peaks at 1.5 A. Operating time is 30...55 ms for both AC and DC, with an arcing time of 10...20 ms. Switching rates vary by duty: 1 200 operations per hour at AC-1 (resistive), 750/h at AC-2, 1 000/h at AC-3 and AC-3e, and 300/h at AC-4 (plugging/inching). Mechanical life is typical 10 000 000 cycles.
Auxiliary contact ratings and environmental limits
The auxiliary contact is rated for switching: 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, and 0.3 A at 220 V — all at rated values. Operating temperature range is -25 to +60 °C; storage range is -55 to +80 °C. Clearance distances: 10 mm upwards, forwards, and downwards; 6 mm at the side.
Panel fit and integration
The contactor measures 55 mm wide, 114 mm high, and 130 mm deep — size S2 footprint. It mounts on 35 mm DIN rail per DIN EN 60715 or via screw fixing. The screw-type coil terminals and main contact terminals accept the wire gauges listed, and the auxiliary contact is pre-wired internally.