{"product_id":"siemens-first-lateral-auxiliary-switch-for-3rt1-2no-screw-terminal","title":"Siemens First lateral auxiliary switch for 3RT1, 2NO, screw terminal","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Siemens 3RH1921-1EA20 is a side-mount auxiliary switch block designed for SIRIUS contactors (size S0). It includes two normally open (2 NO) instantaneous auxiliary contacts for reliable signalling, control, and feedback operations in motor starter and automation circuits. Its compact, robust construction ensures dependable operation under demanding industrial conditions.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSide-mount auxiliary switch block for Siemens SIRIUS contactors\u003c\/li\u003e\n\u003cli\u003eContact configuration: 2 normally open (2 NO) contacts\u003c\/li\u003e\n\u003cli\u003eInstantaneous contact operation for accurate control response\u003c\/li\u003e\n\u003cli\u003eScrew terminal connection for secure wiring\u003c\/li\u003e\n\u003cli\u003eCompatible with S0-size contactor frames in the 3RT1 series\u003c\/li\u003e\n\u003cli\u003eCompact design allowing easy installation and durable operation\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\u003eProduct Series:\u003c\/strong\u003e Siemens SIRIUS Auxiliary Switch Blocks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArticle Number:\u003c\/strong\u003e 3RH1921-1EA20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact Configuration:\u003c\/strong\u003e 2 NO instantaneous contacts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Insulation Voltage (Ui):\u003c\/strong\u003e 500 V AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Impulse Withstand Voltage (Uimp):\u003c\/strong\u003e 6 kV\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Operational Current (AC-15, 230 V):\u003c\/strong\u003e 3 A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Service Life:\u003c\/strong\u003e 10 million operating cycles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrical Endurance (AC-15, 230 V):\u003c\/strong\u003e 200,000 switching cycles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Class (Front):\u003c\/strong\u003e IP20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Position:\u003c\/strong\u003e Lateral, left side of contactor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContactor Size Compatibility:\u003c\/strong\u003e S0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNet Weight (Approx.):\u003c\/strong\u003e 0.05 kg\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\u003eComplies with IEC \/ EN 60947-5-1 standards for auxiliary switching devices\u003c\/li\u003e\n\u003cli\u003eDesigned for industrial motor control and automation applications\u003c\/li\u003e\n\u003cli\u003eRoHS compliant and manufactured under Siemens quality standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Siemens 3RH1921-1EA20 auxiliary contact block is ideal for use in control panels, automation systems, and motor starter combinations requiring additional signalling or feedback contacts. Its high durability, simple mounting, and precise contact performance make it well-suited for continuous industrial operation.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":40775096565824,"sku":"3RH1921-1EA20","price":225.73,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/3662\/3424\/files\/G_IC03_XX_07679I.jpg?v=1761055770","url":"https:\/\/industrial.rubicon.tech\/products\/siemens-first-lateral-auxiliary-switch-for-3rt1-2no-screw-terminal","provider":"Rubicon Group Industrial Technology Shop","version":"1.0","type":"link"}