{"product_id":"siemens-coupling-contactor-relay-2-no-2-nc-24-v-dc","title":"Siemens Coupling contactor relay, 2 NO + 2 NC, 24 V DC","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Siemens 3RH2122-1HB40 is a coupling contactor relay in the SIRIUS 3RH2 series. It is designed with two normally-open (NO) and two normally-closed (NC) auxiliary contacts and a coil voltage of 24 V DC (operating range 0.7…1.25 × Us). The device uses screw-type terminals, fits frame size S00, and is suitable for PLC output switching and auxiliary circuit control.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCoupling contactor relay with 2 NO + 2 NC auxiliary contacts\u003c\/li\u003e\n\u003cli\u003eCoil\/control voltage: 24 V DC, range 0.7…1.25 × Us\u003c\/li\u003e\n\u003cli\u003eFrame size S00 – compact form factor\u003c\/li\u003e\n\u003cli\u003eScrew-terminal connections for auxiliary and control circuits\u003c\/li\u003e\n\u003cli\u003eDesigned for use with auxiliary and control circuits upstream of larger switches\/contactors\u003c\/li\u003e\n\u003cli\u003eHigh mechanical durability and reliable switching behaviour under industrial conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eArticle Number:\u003c\/strong\u003e 3RH2122-1HB40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries \/ Type:\u003c\/strong\u003e SIRIUS 3RH2 coupling contactor relay\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact Configuration:\u003c\/strong\u003e 2 NO + 2 NC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl Supply Voltage (Coil):\u003c\/strong\u003e 24 V DC (operating range 0.7…1.25 × Us)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Insulation Voltage:\u003c\/strong\u003e 690 V AC (pollution degree 3)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurge Voltage Resistance:\u003c\/strong\u003e 6 kV\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Service Life (Typical):\u003c\/strong\u003e approx. 30,000,000 switching cycles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight × Width × Depth:\u003c\/strong\u003e approx. 57.5 mm × 45 mm × 73 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmbient Operating Temperature:\u003c\/strong\u003e -25 °C to +60 °C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Type:\u003c\/strong\u003e Screw-type terminals; conductor cross-section for auxiliary contacts: 0.5…4 mm²\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eCompliance \u0026amp; Certifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned in accordance with IEC\/EN standards for auxiliary contactors\/relays (e.g., IEC 60947-5-1)\u003c\/li\u003e\n\u003cli\u003eFront protection rating: IP20, finger-safe\u003c\/li\u003e\n\u003cli\u003eRated for industrial mounting and operation up to 2,000 m altitude without derating\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThis coupling relay is ideal for switching auxiliary control circuits, PLC outputs, and enabling downstream power contactors in industrial automation systems. Typical uses include control panels, machine tool logic, conveyor systems, and other automation equipment where compact, reliable auxiliary switching is required.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":40775076380736,"sku":"3RH2122-1HB40","price":800.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/3662\/3424\/files\/3RH2122-1HB40.jpg?v=1763632918","url":"https:\/\/industrial.rubicon.tech\/products\/siemens-coupling-contactor-relay-2-no-2-nc-24-v-dc","provider":"Rubicon Group Industrial Technology Shop","version":"1.0","type":"link"}