{"product_id":"siemens-3rh2911-1ha31-sirius-auxiliary-contact-block-3no-1nc","title":"Siemens SIRIUS Auxiliary Contact Block 3NO + 1NC Front Mounting Screw Terminal – 3RH2911-1HA31","description":"\u003cp\u003eThe Siemens SIRIUS 3RH2911-1HA31 is a four-pole auxiliary switch block that snaps onto the front of a 3RT2 contactor or 3RH2 contactor relay, adding three normally-open and one normally-closed contact for interlocking, signalling and control logic. Positively driven operation to IEC 60947-5-1 means the contacts are mechanically tied to the main contactor state—essential where the auxiliary contact is relied on for safe interlocking. Terminal designation follows EN 50012.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e3 NO + 1 NC instantaneous contacts (contact sequence 1 NC, 1 NO, 1 NO, 1 NO)\u003c\/li\u003e\n\u003cli\u003eFront-mounting: snaps onto the base unit without additional rail space\u003c\/li\u003e\n\u003cli\u003eFits 3RT2 contactors sizes S00 to S3 and 3RH2 contactor relays\u003c\/li\u003e\n\u003cli\u003eScrew terminals accepting 0.5–2.5 mm²\u003c\/li\u003e\n\u003cli\u003eRated insulation voltage 690 V, thermal current 10 A\u003c\/li\u003e\n\u003cli\u003e10 million operating cycles mechanical endurance\u003c\/li\u003e\n\u003cli\u003ePositively driven operation per IEC 60947-5-1; mirror contact per IEC 60947-4-1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSiemens order number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3RH2911-1HA31\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct designation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAuxiliary switch, on the front, 3 NO + 1 NC, screw terminal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct family\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSIRIUS Innovations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eContact configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3 NO + 1 NC (4 poles, all instantaneous)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eContact sequence\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 NC, 1 NO, 1 NO, 1 NO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFront-mounting (snap-on)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTerminal designation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eper EN 50012\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnection type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eScrew terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConductor cross-section\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.5–2.5 mm², solid or stranded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated insulation voltage (Ui)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e690 V at pollution degree 3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated impulse withstand voltage (Uimp)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6 kV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThermal current (Ith)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAC-15 rated current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6 A at 24 V \/ 6 A at 230 V \/ 3 A at 400 V \/ 1 A at 690 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDC-13 rated current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6 A at 24 V \/ 2 A at 60 V \/ 1 A at 110 V \/ 0.3 A at 220 V \/ 0.3 A at 250 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSuitable for\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3RT2.1, 3RT2.2, 3RT2.3, 3RT2.4 contactors (sizes S00, S0, S2, S3) and 3RH2 contactor relays\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMechanical endurance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10,000,000 operating cycles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eElectrical endurance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eapprox. 200,000 operating cycles (AC-15, 230 V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions (H × W × D)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e37.5 × 36 × 43.7 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDegree of protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAmbient temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e–25 to +60 °C in operation; –55 to +80 °C storage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandards\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIEC 60947-5-1, IEC 60947-4-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003ePlease note\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize S00 restriction:\u003c\/strong\u003e per Siemens, on size S00 this block can be mounted to EN 50012 only on base units which have no integrated NC contact. Please check your base unit before ordering.\u003c\/li\u003e\n\u003cli\u003eThis is the SIRIUS Innovations generation accessory, for 3RT2 \/ 3RH2 base units. The predecessor for older 3RT1 \/ 3RH1 base units is \u003cstrong\u003e3RH1911-1HA31\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eFor the spring-loaded (push-in) terminal version of the same contact complement, order \u003cstrong\u003e3RH2911-2HA31\u003c\/strong\u003e. Contact us if you need the ring-terminal variant.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":44326732660823,"sku":"3RH2911-1HA31","price":45.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0345\/6101\/files\/3RH2911-1HA31.jpg?v=1790057655","url":"https:\/\/www.bnrindustrial.com.au\/products\/siemens-3rh2911-1ha31-sirius-auxiliary-contact-block-3no-1nc","provider":"BNR Industrial Automation","version":"1.0","type":"link"}