{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-2HA12-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-2HA12-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-2HA12-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2HA12-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch, 1 NO instantaneous contact, snap-on front mounting for contactor sizes S00, S0, S2, S3, 6 A at 24 V, 10 A rated value at 24 V, IP20 front.","salesMarkdown":"The Siemens 3RH2911-2HA12-ZX95 is a SIRIUS auxiliary switch with one normally open instantaneous contact, designed to snap onto the front of contactor relays and power contactors in frame sizes S00, S0, S2, and S3. It carries a 6 A rating at 24 V and a 10 A rated value at 24 V, with a surge voltage resistance of 6 kV. The contact ratings drop as voltage rises: 6 A at 24 V, 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. The rated values at higher voltages follow a similar curve — 10 A at 24 V rated value, 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. These are the limits for the silver-alloy contacts; switching an inductive load below these numbers is safe, but the 17 V, 1 mA contact reliability figure (1 faulty switching per 100 million operations) confirms the contacts are designed for dry-circuit signal integrity as well as power switching. ## Mounting and wiring integration Snap-on mounting to the front of the contactor — no tools, no DIN rail bracket. The terminal accepts 2x (0.5 to 2.5 mm²) solid or stranded wire, or 2x (20 to 14 AWG). For finely stranded wire with ferrules, the range is 2x (0.5 to 1.5 mm²); without ferrules, 2x (0.5 to 2.5 mm²). The 36 mm width and 47.7 mm depth keep the assembly within the contactor's envelope — no extra panel clearance needed beyond what the base contactor already requires. The mirror contact function per IEC 60947-4-1 is confirmed when used with 3RT2 contactors — this is a safety-relevant feature for load-side isolation monitoring. The part is RoHS-compliant per the substance prohibitance date of October 1, 2009.","metaTitle":"Siemens 3RH2911-2HA12-ZX95 SIRIUS Auxiliary Switch, 1 NO, sn","metaDescription":"Siemens SIRIUS 3RH2911-2HA12-ZX95 auxiliary switch, 1 NO contact, snap-on for S00-S3 contactors. Rated 6 A at 24 V, 10 A at 24 V rated value. IP20 front. Sourced to order against R","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"47.7 mm","Width":"36 mm","Height":"41.5 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","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","Product Category":"Auxiliary switch","Lagging Switching":"0","Size Of Contactor":"S00, S0, S2, S3","Solid Or Stranded":"2x (0.5 ... 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":"for snapping onto the front","Instantaneous Contact":"1","Substance Prohibitance (Date)":"10/01/2009","protection class IP on the front":"IP20","Surge Voltage Resistance Rated Value":"6 kV","for AWG cables for auxiliary contacts":"2x (20 ... 14)","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 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; with 3RT2","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","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":"spring-loaded 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,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/75805eb08ce6f55a52f9fac4afe983d0.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=720027&mlfb=3RH2911-2HA12-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2HA12-ZX95/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RH2911-2HA12-ZX95 and how is it quoted?","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 commitment."},{"question":"What is the closest functional second-source for 3RH2911-2HA12-ZX95?","answer":"The closest peer in the same SIRIUS family is the 3RH2122-2AV60, which carries a different contact configuration (2 NO + 2 NC versus the 1 NO on this part) and a different voltage rating profile. The 3RH2911-2HA12-ZX95 will drop into the same S00/S0/S2/S3 contactor front slot without rewiring the base contactor, but the contact count differs — verify your circuit's NO/NC requirements before substituting."},{"question":"What compliance documentation does Siemens provide for 3RH2911-2HA12-ZX95?","answer":"The part carries RoHS compliance per the substance prohibitance date of October 1, 2009, and the mirror contact function is certified per IEC 60947-4-1 when used with 3RT2 contactors. Standard Siemens documentation includes the declaration of conformity and the product datasheet."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-2HA12-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/3RH2911-2HA12-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}}