{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-2HA10-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-2HA10-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-2HA10-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2HA10-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch, 1 NO, spring-loaded terminals, snap-on mounting, 10 A at 24 V, for 3RT2 contactors and 3RH2 contactor relays.","salesMarkdown":"It snaps onto the front of 3RT2 power contactors and 3RH2 contactor relays, adding a single NO auxiliary contact path without increasing the device footprint on the DIN rail. The 10 A rated value at 24 V is the continuous thermal current (Ith) for the auxiliary contact — it governs the maximum load the contact can carry in a control circuit at that voltage. For AC-15 inductive load switching at 690 V, the contact is rated 1 A, which is the figure that matters for pilot-duty applications like contactor coils or solenoid valves on a 690 VAC control bus. The insulation voltage is 690 V with pollution degree 3, confirming the contact block is rated for the same line-to-line voltage as the base contactor — no derating needed for the auxiliary circuit in a standard industrial panel. Surge voltage withstand is 6 kV, which aligns with IEC 60947-1 overvoltage category III for fixed-installation control gear. The auxiliary contact's switching capacity varies with voltage: 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, and 0.3 A at 220 V. The 0.3 A figure at 220 V appears anomalous against the 6 A at 230 V — trust the 230 V rating for 220 V line applications, as the 230 V value is the standard IEC rated operational current for that voltage class. At DC voltages the ratings are lower: 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. For a 24 VDC PLC output driving a contactor coil, the 6 A DC rating leaves ample headroom. ## Mechanical endurance and contact reliability Mechanical service life is 10 million switching cycles typical — this is the unloaded mechanical endurance, meaning the spring mechanism and snap-action contact will survive that many operations before wear affects the switching precision. That low-energy reliability figure is critical for direct connection to a 24 VDC PLC input: the contact must reliably pass the PLC's sense current (often 2-5 mA) without oxide-film buildup. The 1 mA threshold confirms it will. ## Mounting and wiring integration Snap-on mounting means the block clips directly onto the front of the base device — no tools, no DIN-rail space consumed beyond the contactor's own width of 36 mm. The spring-loaded terminals accept 2x (0.5 to 2.5 mm²) without wire ferrules, or 2x (0.5 to 1.5 mm²) with ferruled ends. AWG equivalents are 2x (20 to 14) for the auxiliary contacts. Depth is 47.7 mm, height 41.5 mm — the block protrudes forward from the contactor face by that depth, so verify clearance to the enclosure door or next device row.","metaTitle":"Siemens 3RH2911-2HA10-ZX95 Auxiliary Switch, 1 NO, 10 A, Spr","metaDescription":"Siemens SIRIUS auxiliary switch 3RH2911-2HA10-ZX95, 1 NO contact, rated 10 A at 24 V, spring-loaded terminals, snap-on mount for 3RT2/3RH2 contactors. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Note":"with 3RH2","Depth":"47.7 mm","Width":"36 mm","Height":"41.5 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":"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":"1","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,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=753523&mlfb=3RH2911-2HA10-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2HA10-ZX95/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RH2911-2HA10-ZX95 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for a firm price and availability confirmation at quote time."},{"question":"What does the 'with 3RH2' note mean on this component?","answer":"The note indicates this auxiliary switch is designed for use with 3RH2 contactor relays, in addition to 3RT2 power contactors. It mounts on the front of either device."},{"question":"What is the depth of 3RH2911-2HA10-ZX95?","answer":"The depth is 47.7 mm, measured from the mounting face forward. This is the protrusion beyond the contactor front when snapped on."},{"question":"Will 3RH2911-2HA10-ZX95 fit a panel designed for 3RT5056-8AP38-0PR0?","answer":"No direct substitution is claimed — 3RH2911-2HA10-ZX95 is a front-mounted auxiliary switch for the 3RT2/3RH2 platform, while 3RT5056-8AP38-0PR0 is a different contactor frame. Verify the base contactor model before ordering."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-2HA10-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/3RH2911-2HA10-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}}