{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH6921-1DA11","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH6921-1DA11","canonicalUrl":"https://aoctrl.com/siemens/3RH6921-1DA11","factsUrl":"https://aoctrl.com/api/mcp/products/3RH6921-1DA11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch, 3RH6921-1DA11, 10 mm width, snap-on mounting for S0 contactors, 6 A at 24 V, mirror contact per IEC 60947-4-1.","salesMarkdown":"At 10 mm wide, it adds one normally open instantaneous contact without increasing the contactor's panel depth beyond 66 mm. ## Switching capacity and contact reliability The contact is rated for 6 A at 24 V and 230 V, with derated values across the voltage range: 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V and 250 V, and 3 A at 400 V. For AC-15 inductive loads at 690 V, the rated operational current is 1 A. The AC-15 ratings at lower voltages are 10 A at 24 V, 4.7 A at 60 V, 3 A at 110 V, 1.2 A at 220 V, 0.5 A at 440 V, and 0.26 A at 600 V. ## Mechanical endurance and wiring The snap-on fastening method means it clips directly onto the contactor without tools — no DIN rail or additional hardware required. Wiring accepts 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded conductors, or the equivalent AWG sizes 20-16 and 18-14. Finely stranded wire with core-end processing uses the same cross-section ranges.","metaTitle":"Siemens 3RH6921-1DA11 SIRIUS Auxiliary Switch, 10 mm, snap-o","metaDescription":"Siemens 3RH6921-1DA11 SIRIUS auxiliary switch, 10 mm wide, snap-on mounting for S0 contactors. Rated 6 A at 24 V, mirror contact per IEC 60947-4-1. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"66 mm","Width":"10 mm","title":"3RH6921-1DA11","Height":"57.4 mm","at 24 V":"6 A","at 48 V":"2 A","at 60 V":"2 A","at 110 V":"1 A","at 125 V":"0.9 A","at 220 V":"0.3 A","at 230 V":"6 A","at 250 V":"0.3 A","at 400 V":"3 A","description":"Lateral AUX. switch block, for motor contactors 1 NO + 1 NC, size S0, screw terminal EN 50005","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","Lagging Switching":"0","Size Of Contactor":"S0","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"auxiliary switch","Suitability For Use":"Contactor relay and power contactor","at 24 V rated value":"10 A","at 60 V rated value":"4.7 A","at 110 V rated value":"3 A","at 220 V rated value":"1.2 A","at 440 V rated value":"0.5 A","at 600 V rated value":"0.26 A","Design Of The Product":"first laterally mountable","Instantaneous Contact":"1","Substance Prohibitance (Date)":"05/01/2012","protection class IP on the front":"IP20","Surge Voltage Resistance Rated Value":"6 kV","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","mirror contact according to IEC 60947-4-1":"Yes","operational current at AC-15 at 690 V rated value":"1 A","Mechanical Service Life (Operating Cycles) Typical":"10 000 000","operational current of auxiliary contacts at AC-12 maximum":"10 A","Type Of Electrical Connection For Auxiliary And Control Circuit":"screw-type terminals","insulation voltage with degree of pollution 3 at AC rated value":"690 V","number of CO contacts of auxiliary contacts instantaneous contact":"0","AWG number as coded connectable conductor cross section for auxiliary contacts":"20 ... 14"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/311e04b338cddb0aebedb593f802a75a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=641408&mlfb=3RH6921-1DA11"},"ai":{"faq":[{"question":"Where can I buy 3RH6921-1DA11 and get a price?","answer":"The 3RH6921-1DA11 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"Will 3RH6921-1DA11 drop into a panel specified around 3RH6140-1BF40 without rewiring?","answer":"Both are SIRIUS auxiliary switches for S0 contactors, but the 3RH6140-1BF40 is a different form factor. The 3RH6921-1DA11 is 10 mm wide and snap-on mounted, while the 3RH6140-1BF40 is a screw-type terminal block. Panel fit depends on the contactor frame and wiring method — verify the mounting interface before substitution."},{"question":"What compliance documentation does Siemens provide for 3RH6921-1DA11?","answer":"The product carries RoHS compliance per a substance prohibition date of May 1, 2012. It is a mirror contact per IEC 60947-4-1, with a rated surge voltage resistance of 6 kV. Standard Siemens documentation includes the declaration of conformity and CE marking."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH6921-1DA11","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3RH6921-1DA11 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}