{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1911-1HA12-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1911-1HA12-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RH1911-1HA12-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1HA12-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, 3RH1911-1HA12-ZX95, 1 NO + 2 NC, 10 A max, screw terminals, snap-on mounting, IP20 front.","salesMarkdown":"The Siemens SIRIUS 3RH1911-1HA12-ZX95 is a 4-pole auxiliary switch block with 1 normally open and 2 normally closed contacts, designed for snap-on mounting to contactor relays and power contactors in the SIRIUS family. Rated at 10 A maximum, the contacts handle a range of control voltages: 6 A at 24 V, 6 A at 125 V, 6 A at 230 V, 6 A at 250 V, 3 A at 400 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V, giving you the flexibility to use it across different control circuits without recalculating ratings. The block uses screw-type terminals accepting 2x (0.5...1.5 mm²) and 2x (0.75...2.5 mm²) conductors, or 2x (20...16) and 2x (18...14) AWG, and carries an IP20 protection rating on the front — standard for enclosed panel mounting. ## Lifecycle reality — phased out, successor named This part is a phased-out product. The manufacturer lists the SIRIUS 3RH2 as the official successor series. No spare, no sleep: if you're holding a legacy cabinet with this block, securing a critical spare now avoids a line-down scramble later. ## Contact reliability and mechanical life Contact reliability is specified at one faulty switching per 100 million operations at 17 V, 5 mA, and at 17 V, 1 mA for auxiliary contacts — useful for PLC-level signal switching where low-energy circuits must not miss a pulse. Snap-on mounting onto a contactor relay or power contactor — no DIN rail required, no extra hardware. Dimensions are 41.5 mm deep, 36.5 mm wide, 37.5 mm high, so it adds minimal depth to the contactor assembly. Insulation voltage rated at 690 V with pollution degree 3, surge voltage resistance at 6 kV.","metaTitle":"Siemens 3RH1911-1HA12-ZX95 Auxiliary Switch Block, 10 A, Pha","metaDescription":"Siemens SIRIUS 3RH1911-1HA12-ZX95 auxiliary switch block, 1 NO + 2 NC, 10 A, screw terminals. Phased-out product; successor SIRIUS 3RH2. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Note":"with 3RH1","Depth":"41.5 mm","Width":"36.5 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","Mounting type":"snap-on mounting","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Product brand name":"SIRIUS","Contact reliability":"one incorrect switching operation of 100 million switching operations (17 V, 5 mA)","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":"1","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 conductors 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","Insulation voltage with degree of pollution 3 rated value":"690 V","Type of electrical connection for auxiliary and control current circuit":"screw-type terminals"}},"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=66424&mlfb=3RH1911-1HA12-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1HA12-ZX95/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RH1911-1HA12-ZX95 and get a price?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead-time check."},{"question":"What are the key contact ratings for this auxiliary switch block?","answer":"Maximum rating is 10 A. At 24 V it handles 6 A, at 125 V it handles 6 A, at 230 V it handles 6 A, at 250 V it handles 6 A, at 400 V it handles 3 A, at 60 V it handles 2 A, at 110 V it handles 1 A, and at 220 V it handles 0.3 A."},{"question":"Does this part snap onto a contactor or require DIN rail?","answer":"It snaps directly onto a SIRIUS contactor relay or power contactor — no DIN rail needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1911-1HA12-ZX95","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/3RH1911-1HA12-ZX95 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}}