{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1HA22-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1HA22-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1HA22-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1HA22-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2911-1HA22-ZX95 auxiliary switch block, 2 NO + 2 NC, screw-type terminals, 10 A maximum rated current, snap-on mounting, IP20 front protection.","salesMarkdown":"## What this auxiliary switch block does The 3RH2911-1HA22-ZX95: This is a front-mounted auxiliary switch block for the SIRIUS contactor family — 2 normally-open and 2 normally-closed contacts, screw-type terminals, designed to snap onto 3RT2 power contactors or 3RH2 contactor relays. The contact arrangement is 1 NC, 1 NC, 1 NO, 1 NO on the current path, giving you two isolated NC and two isolated NO circuits in a single 36 mm wide block. ## Current ratings — what they mean for your circuit Rated 10 A maximum, but the actual switching capacity depends on the circuit voltage: 6 A at 24 V AC/DC, 6 A at 125 V, 6 A at 230 V, 3 A at 400 V, and 0.3 A at 220 V DC. For DC-13 duty (solenoid/brake loads), the ratings drop further: 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, 0.26 A at 600 V — the DC arc extinguishes slower, so derate accordingly. At AC-15 (inductive loads like contactor coils) at 690 V, the rated current is 1 A — the insulation voltage is 690 V AC at pollution degree 3, so this block can live in a 400/480 V panel with margin. ## Service life and contact reliability Mechanical service life is 10 million switching cycles typical — for a contactor that cycles once per minute, that's about 19 years of continuous operation before the mechanism wears out. Contact reliability is specified at 1 faulty switching per 100 million operations at 17 V, 1 mA — this matters for PLC input circuits where dry switching (low voltage, low current) can cause oxide film issues on standard contacts. ## Panel integration and wiring Snap-on mounting to DIN rail — no screws needed for the block itself. Dimensions are 36 mm wide, 43.7 mm deep, 37.5 mm high, fitting standard enclosure layouts. Screw-type terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) with core end processing, or 2x (20 to 16 AWG) or 2x (18 to 14 AWG) for solid/stranded wire. Front protection is IP20 — finger-safe inside an enclosure but not rated for washdown or outdoor exposure without a cabinet. ## Surge and environmental ratings Surge voltage resistance is 6 kV — this block can handle transient overvoltages common in industrial power distribution without flashover. Operating temperature range is -25 to +60 °C; storage range is -55 to +80 °C — suitable for most indoor industrial environments including unheated warehouses.","metaTitle":"Siemens 3RH2911-1HA22-ZX95 Auxiliary Switch, 2NO+2NC, 10A","metaDescription":"Siemens SIRIUS auxiliary switch block, 2 NO + 2 NC contacts, screw terminals, rated 10 A max. 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":"3RH2911-1HA22-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 + 2 NC,.1/.2,.1/.2,.3/.4,.3/.4, current path: 1 NC, 1 NC, 1 NO, 1 NO, 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/15611b49830d6e0ff3387883f1512283.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=320243&mlfb=3RH2911-1HA22-ZX95"},"ai":{"faq":[{"question":"What contactor does 3RH2911-1HA22-ZX95 mount on?","answer":"This auxiliary switch block mounts on the front of Siemens 3RT2 power contactors and 3RH2 contactor relays. It snaps onto the DIN-rail-mounted device without additional hardware."},{"question":"What is the maximum current rating for 3RH2911-1HA22-ZX95?","answer":"The maximum rated current is 10 A, but the actual switching capacity depends on voltage and duty type. At 24 V AC/DC it handles 6 A; at 400 V AC it handles 3 A; for DC-13 at 24 V it handles 10 A but derates to 0.26 A at 600 V DC."},{"question":"How many switching cycles does 3RH2911-1HA22-ZX95 last?","answer":"Mechanical service life is 10 million switching cycles typical. Contact reliability is 1 fault per 100 million operations at low-level signals (17 V, 1 mA)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1HA22-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/3RH2911-1HA22-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}}