{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1FC30","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1FC30","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1FC30","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1FC30","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, 3 NO, screw terminals, snap-on front mount for 3RT2 contactors and 3RH2 contactor relays, 43.7 x 36 x 37.5 mm.","salesMarkdown":"The Siemens 3RH2911-1FC30 is a front-mounted auxiliary switch block in the SIRIUS family, carrying three normally-open (3 NO) contacts with screw-type terminals. It snaps onto the front of 3RT2 power contactors and 3RH2 contactor relays, adding auxiliary switching capacity without expanding the DIN-rail footprint. ## Switching ratings — what the numbers mean Rated 10 A maximum, but the real-world switching capacity depends on the circuit voltage. At 24 V it handles 6 A; at 125 V also 6 A; at 230/250 V still 6 A. At 400 V the rating drops to 3 A, and at 220 V DC it manages only 0.3 A. For AC-15 inductive loads at 690 V — typical for pilot-duty control circuits — the rated value is 1 A. The DC switching curve is steep: 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, down to 0.26 A at 600 V. Snap-on mounting to the contactor front — no tools, no DIN-rail space consumed. Dimensions are 43.7 mm deep, 36 mm wide, 37.5 mm high. Screw terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) with core-end processing, or 2x (20 to 16) and 2x (18 to 14) AWG. The contact sequence is 1 NO leading, 1 NO leading, 1 NO leading — all three close simultaneously, no lagging or instantaneous contacts on this variant. IP20 front protection keeps fingers out of the terminal area.","metaTitle":"Siemens 3RH2911-1FC30 SIRIUS Auxiliary Switch, 3 NO, 10 A","metaDescription":"Siemens SIRIUS 3RH2911-1FC30 auxiliary switch block, 3 NO contacts, rated 10 A max. Snap-on front mount for 3RT2/3RH2 contactors. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"43.7 mm","Width":"36 mm","Height":"37.5 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","During Storage":"-55 ... +80 °C","Leading Contact":"3","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","Lagging Switching":"1","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":"0","With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 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 ... 16), 2x (18 ... 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":"screw-type terminals","insulation voltage with degree of pollution 3 at AC rated value":"690 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c7402f4338a968cadf0ef461883a20a8.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=649010&mlfb=3RH2911-1FC30","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1FC30/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RH2911-1FC30 and get a price?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for your quantity."},{"question":"What are the switching ratings for 3RH2911-1FC30 at different voltages?","answer":"Maximum 10 A. At 24 V AC it switches 6 A; at 125 V AC 6 A; at 230/250 V AC 6 A; at 400 V AC 3 A. For DC: 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, 0.26 A at 600 V. AC-15 inductive rating at 690 V is 1 A."},{"question":"What is the depth of 3RH2911-1FC30?","answer":"43.7 mm deep, 36 mm wide, 37.5 mm high."},{"question":"Does 3RH2911-1FC30 snap onto 3RT2 contactors?","answer":"Yes. It is designed for snap-on front mounting on 3RT2 power contactors and 3RH2 contactor relays. No DIN-rail space is consumed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1FC30","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/3RH2911-1FC30 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}