{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-2DA20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-2DA20","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-2DA20","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2DA20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2911-2DA20 auxiliary switch, 2 NO, left: 43/44, 53/54, right: 23/24, 33/34, spring-loaded terminals, snap-on mounting, 10 A maximum, IP20.","salesMarkdown":"The Siemens 3RH2911-2DA20 is a lateral auxiliary switch block from the SIRIUS family, designed to snap onto 3RT2 contactors. It carries two normally-open (NO) contacts on each side — left terminals 43/44 and 53/54, right terminals 23/24 and 33/34 — all wired via spring-loaded terminals that accept 2x (0.5…1.5 mm²) with ferrule or 2x (0.5…2.5 mm²) solid, no tool needed for the wire termination. The headline maximum of 10 A is the thermal current (Ith) through the contact path, but the real-world switching capability depends on voltage and duty. At 24 V it handles 10 A (resistive) or 6 A (inductive, AC-15 typical); at 690 V AC-15 it drops to 1 A — the arc energy at higher voltage limits the make/break capacity. The insulation rating of 690 V AC (pollution degree 3) and surge withstand of 6 kV mean this switch is rated for 400 V line-to-line control circuits without needing extra clearance. ## Snap-on integration with 3RT2 contactors This block mounts on the left side of 3RT2 contactors via the snap-on fastening method — no screws, no DIN rail footprint consumed beyond the contactor's own width (10 mm for the switch block itself).","metaTitle":"Siemens 3RH2911-2DA20 SIRIUS Auxiliary Switch, 2 NO, Spring-","metaDescription":"Siemens 3RH2911-2DA20 SIRIUS auxiliary switch, 2 NO, snap-on mount, spring-loaded terminals, 10 A max, IP20. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Note":"with 3RT2","Depth":"66 mm","Width":"10 mm","title":"3RH2911-2DA20","Height":"64.8 mm","Maximum":"10 A","at 24 V":"6 A","at 60 V":"2 A","at 110 V":"1 A","at 125 V":"6 A","at 220 V":"0.3 A","at 230 V":"6 A","at 250 V":"6 A","at 400 V":"3 A","description":"auxiliary switch, lateral, 2 NO, on the left: 43/44, 53/54, on the right: 23/24, 33/34, current path: 1 NO, 1 NO, spring-loaded terminal, for contactors 3RT2.1","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","Lagging Switching":"0","Product Brand Name":"SIRIUS","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","Instantaneous Contact":"2","With Core End Processing":"2x (0.5 ... 1.5 mm²)","Without Core End Processing":"2x (0.5 ... 2.5 mm²)","at AC-15 at 690 V rated value":"1 A","protection class IP on the front":"IP20","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 14)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Mechanical Service Life (Switching Cycles) Typical":"10 000 000","Type Of Electrical Connection For Auxiliary And Control Circuit":"spring-loaded terminals","insulation voltage with degree of pollution 3 at AC rated value":"690 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ee2e265ab1171fc82feaed57bc0e390e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=4602&mlfb=3RH2911-2DA20"},"ai":{"faq":[{"question":"What is the 3RH2911-2DA20's listed note (with 3RT2) on this component line?","answer":"The note states 'with 3RT2', confirming this auxiliary switch is designed for use with Siemens 3RT2 contactors."},{"question":"Where can I buy 3RH2911-2DA20 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-2DA20","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/3RH2911-2DA20 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}}