The Siemens SIRIUS 3RH1140-2GG20 is an auxiliary contactor in the S00 frame size, carrying four normally-open instantaneous contacts and no delayed, leading, or lagging switching elements — a straight 4 NO block for signal extension or logic interposing in a control panel. It mounts via screw or snap-on to a DIN rail, with ±180° rotation on a vertical surface and ±22.5° tilt forward/backward, giving panel builders flexibility in tight enclosures. Front-side protection class is IP20, so it's suited for dry indoor cabinets where accidental finger contact is the main concern. The contactor is rated for switching at multiple voltage levels: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V, covering typical control voltages from 24 VDC up to 690 VAC. Contact reliability is specified at one incorrect switching operation per 100 million cycles at 17 V, 1 mA — a solid margin for dry-circuit signal switching. A built-in full-wave rectifier surge suppressor handles coil suppression, so you don't need to add an external flyback diode or RC snubber for standard AC coils.
Mounting and Integration
Dimensions are 73 mm deep, 45 mm wide, and 60 mm tall — a compact footprint that fits the S00 contactor family. The screw and snap-on mounting method lets you clip it onto a DIN rail without tools or screw it directly to a backplate. Terminals accept solid conductors from 0.25 to 2.5 mm², with two clamping points per pole. Pollution degree 3 means it's rated for industrial environments with conductive pollution or dry non-conductive pollution that becomes conductive due to condensation. Operating temperature range is -25 to +60 °C, storage and transport from -55 to +80 °C. Shock resistance is 10g / 5 ms and 5g / 10 ms, suitable for panels on vibrating machinery or near conveyors.
Lifecycle and Sourcing
RoHS compliance is indicated by a substance prohibition date of July 1, 2006, covering the EU RoHS directive. No UL, CSA, or CE listing appears in the evidence, but the SIRIUS series typically carries these for the European and North American markets — verify with the order desk if your project requires specific agency marks.