What it is and where it fits
The Siemens 3RH1131-1AP00-ZW95 is a SIRIUS auxiliary contactor in frame size S00, carrying three normally-open instantaneous contacts and no delayed or make-before-break switching. It mounts via screw or snap-on to a DIN rail, with the mounting position allowing ±180° rotation on a vertical surface and ±22.5° tilt forward or backward. The front panel carries IP20 protection, so it belongs inside a control cabinet — not in a washdown zone.
Contact ratings — what they mean for the load
The three NO contacts are rated by voltage, not by a single blanket current. At 24 V the contact carries 10 A; at 230 V 50/60 Hz it carries 6 A; at 400 V it drops to 3 A; and at 690 V it carries 1 A. For DC switching the ratings are lower: 1 A at 110 V, 0.27 A at 220 V. These are the thermal current limits — the contactor's actual switching capacity depends on the load type and the make/break duty. The surge voltage resistance is rated at 6 kV, which covers the impulse withstand for most 400 V industrial panels.
Integration notes
The contactor occupies 45 mm width on the DIN rail, with a depth of 72 mm and height of 57.5 mm. Wire capacity accepts solid conductors: 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², or 2x 4 mm². The S00 frame is the smallest in the SIRIUS contactor family — it fits tight panel layouts but still leaves room for auxiliary switch blocks (the product extension auxiliary switch is supported). Operating temperature range is -25 to +60 °C; storage and transport range extends from -55 to +80 °C. Shock resistance is rated at 10g / 5 ms and 5g / 10 ms, adequate for most machine-mounted cabinets.
Compliance and approvals
The part carries a substance prohibition date of 07/01/2006, aligning with RoHS compliance. Pollution degree 3 means it is rated for conductive pollution environments typical of industrial control panels. Contact reliability is specified as one incorrect switching operation per 100 million operations at 17 V, 1 mA — this matters for PLC-level signal switching where dry-contact reliability is critical.