What it is and what it does
The Siemens 3RH1131-1AF00-ZW96 is a SIRIUS auxiliary contactor in size S00, carrying three normally-open instantaneous contacts and no delayed or lagging switching contacts. It is designed to extend the signal-routing capacity of a main contactor or to serve as a standalone interposing relay in a control circuit. Rated for 10 A at 24 V, it handles the typical PLC output or pilot-duty load without issue. The contact reliability spec — one incorrect switching operation per 100 million cycles at 17 V, 1 mA — means it also reliably switches low-energy signals from sensors or electronic modules, not just power-level loads. Surge voltage resistance is rated at 6 kV, and the pollution degree is 3, so it can be installed in conventional industrial panels without conformal coating or sealed enclosures.
Mounting and integration
Fastens via screw or snap-on onto a 35 mm DIN rail. The mounting position is flexible — it can be rotated ±180° on a vertical surface and tilted forward or backward by ±22.5° — which helps when routing wires in a crowded panel. Dimensions are 45 mm wide, 57.5 mm high, and 72 mm deep — the standard S00 footprint that fits alongside SIRIUS contactors and overload relays on the same rail. The IP20 front protection means it is touch-safe for the panel interior but not rated for washdown. Terminal capacity accepts solid conductors from 0.5 mm² up to 4 mm², covering the typical control-wire range for auxiliary circuits.
Lifecycle and sourcing
For compliance documentation, the substance prohibitance date of 07/01/2006 aligns with the original EU RoHS directive, so the part is RoHS-compliant. The SIRIUS series carries CE and UL/CSA certifications as standard, though specific approval marks are not itemized in this listing.
Environmental and mechanical limits
Operating temperature range is -25 to +60 °C; storage and transport range is -55 to +80 °C. Shock resistance is 10g for 5 ms and 5g for 10 ms, which covers most industrial vibration profiles without special mounting. Mechanical endurance is 30 million operating cycles typical for the contactor size, and the contact reliability figure of 100 million operations at low level (17 V, 1 mA) confirms it can handle dry switching without contact oxidation issues.