{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1LA20-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1LA20-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1LA20-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1LA20-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2911-1LA20-ZX95 auxiliary switch, 2 NO contacts, front-mounted, screw-type terminals, 10 A maximum, IP20, snap-on mounting.","salesMarkdown":"## Front-Mounted Auxiliary Switch for 3RT2 / 3RH2 Contactors The 3RH2911-1LA20-ZX95 is a SIRIUS auxiliary switch block that mounts on the front of Siemens 3RT2 contactors and 3RH2 contactor relays, adding two normally-open (NO) auxiliary contacts (terminals 73/74 and 83/84) with screw-type connections. Rated for a maximum of 10 A, the switch provides a mechanical service life of 10 million switching cycles typical, making it suitable for high-cycle applications like conveyor interlocks or valve position feedback. Snap-on mounting onto the contactor front simplifies panel assembly — no additional hardware or DIN-rail space is consumed beyond the contactor footprint. ## Switching Capacity Across Voltage Levels The auxiliary contacts deliver 6 A at 24 V, 125 V, 230 V, and 250 V, but derate to 3 A at 400 V and 0.3 A at 220 V — the voltage-dependent current limits reflect the arc-quenching capability of the contact gap. At AC-15 duty (inductive loads typical of contactor coils and solenoid valves), the switch is rated 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, and 0.26 A at 600 V — these are the values to use for sizing in control circuits. Insulation voltage is rated 690 V at pollution degree 3, with a surge voltage resistance of 6 kV, ensuring reliable isolation in industrial panels with mixed-voltage wiring.","metaTitle":"Siemens 3RH2911-1LA20-ZX95 Auxiliary Switch, 2 NO, 10 A","metaDescription":"Siemens 3RH2911-1LA20-ZX95 SIRIUS auxiliary switch, 2 NO contacts, rated 10 A max, 690 V insulation, IP20 front. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Note":"with 3RH2","Depth":"43.7 mm","Width":"36 mm","title":"3RH2911-1LA20-ZX95","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","description":"auxiliary switch, on the front, 2 NO, 73/74, 83/84, current path: 1 NO, 1 NO, cable entry from the top, screw terminal, for contactors 3RT2 and contactor relays 3RH2, reusable packaging, pack = 351 units","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":"2","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/57a3ce3e1913f68571a47a06c7a55555.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=399711&mlfb=3RH2911-1LA20-ZX95"},"ai":{"faq":[{"question":"What is the 3RH2911-1LA20-ZX95 used for?","answer":"It is a front-mounted auxiliary switch for Siemens 3RT2 contactors and 3RH2 contactor relays, providing two NO auxiliary contacts for status feedback or interlock circuits in motor control panels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1LA20-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/3RH2911-1LA20-ZX95 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}