{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1911-1BA01","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1911-1BA01","canonicalUrl":"https://aoctrl.com/siemens/3RH1911-1BA01","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1BA01","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, 1 NC per EN 50005, screw terminals, size S00, 10 A rated, snap-on mounting.","salesMarkdown":"It snaps onto size S00 contactors and contactor relays, adding a single NC auxiliary contact to the switching assembly. Rated for a maximum of 10 A, its switching capacity varies by voltage and duty: 6 A at 24 V AC/DC, 6 A at 125 V, 6 A at 230 V, and 3 A at 400 V. At 690 V under AC-15 duty, it switches 1 A. For DC control circuits, ratings drop to 4.7 A at 60 V, 1.2 A at 220 V, and 0.26 A at 600 V. The block is rated for 6 kV surge voltage resistance and carries an insulation voltage of 690 V at pollution degree 3, meaning it's suitable for standard industrial panel environments where some conductive contamination may be present. The 3RH1911-1BA01 is a phased-out product. The official Siemens successor is the 3RH2911-1BA01. ## Integration Notes Mounts via snap-on onto SIRIUS S00 contactors. Dimensions are 28.5 mm wide, 37.5 mm high, and 41.5 mm deep. Screw-type terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) with core-end processing, or AWG 2x (20 to 16) and 2x (18 to 14). Front-side protection is IP20, suitable for enclosed control panels. Mechanical service life is 10 million switching cycles typical.","metaTitle":"Siemens 3RH1911-1BA01 SIRIUS Auxiliary Switch Block, 1 NC, 1","metaDescription":"Siemens SIRIUS 3RH1911-1BA01 auxiliary switch block, 1 NC contact, 10 A rated. Snap-on for S00 contactors. Phased-out; successor is 3RH2911-1BA01. Source to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Note":"with 3RH1","Depth":"41.5 mm","Width":"28.5 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","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=361769&mlfb=3RH1911-1BA01","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1BA01/alternatives.json"},"ai":{"faq":[{"question":"What replaces the 3RH1911-1BA01?","answer":"The official Siemens successor is the 3RH2911-1BA01. It is the preferred substitute and maintains the same mounting and form factor for S00 contactors."},{"question":"How does the 3RH1911-1BA01 compare to the 3RT1016-2AP02?","answer":"The 3RH1911-1BA01 is an auxiliary switch block, not a power contactor. The 3RT1016-2AP02 is a SIRIUS S00 power contactor with three main poles. They are not direct substitutes; the 3RH1911-1BA01 mounts onto a contactor like the 3RT1016-2AP02 to add an NC auxiliary contact."},{"question":"What are the operating and storage temperature ranges?","answer":"Operating temperature range is -25 to +60 °C. Storage range is -55 to +80 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1911-1BA01","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/3RH1911-1BA01 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}}