{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1HA22-ZW98","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1HA22-ZW98","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1HA22-ZW98","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1HA22-ZW98","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2911-1HA22-ZW98 auxiliary switch block, 2 NO + 2 NC, screw terminals, snap-on mounting, 10 A maximum, IP20 front protection.","salesMarkdown":"## What this auxiliary switch block does on a 3RH2 contactor relay The 3RH2911-1HA22-ZW98 is a front-mounted auxiliary switch block designed for Siemens SIRIUS 3RT2 contactors and 3RH2 contactor relays. It adds 2 normally-open and 2 normally-closed auxiliary contacts to the base device, giving you four additional signal or control paths without expanding the panel footprint. Snap-on mounting means it clips directly onto the front of the contactor or relay — no tools, no extra DIN rail slots. The assembled height stays at 37.5 mm, width 36 mm, depth 43.7 mm, so the overall stack fits within the standard contactor envelope. ## Current ratings across the voltage range — what they mean for your control circuit The maximum thermal current is 10 A, but the actual switching capacity depends on the circuit voltage and load type. At 24 V AC-15 duty it handles 6 A; at 230 V the same 6 A holds, while at 400 V it drops to 3 A, and at 690 V to 1 A. These are the values that govern whether this block can switch your specific pilot load — a PLC input, a contactor coil, or a signal lamp — without welding contacts. For DC circuits the numbers are lower: 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. If your application involves DC solenoid valves or indicator loads, use the DC column — the AC rating will not hold under DC arcing conditions. ## Mechanical life and contact reliability — stocking for MRO Rated for 10 million mechanical switching cycles typical, this is a fast-moving spare for any panel using 3RT2 or 3RH2 devices. The contact reliability spec — one faulty switching per 100 million operations at 17 V, 1 mA — means it handles low-energy signal circuits (like PLC inputs) without intermittent opens. ## Panel integration notes — IP20 and surge withstand IP20 on the front means the terminals are finger-safe but the block is not sealed against dust ingress — mount it inside an enclosure rated for the environment. The rated surge voltage resistance is 6 kV, so it can be used in circuits with moderate transient exposure without external suppression. Insulation voltage is 690 V AC at pollution degree 3, which covers standard industrial panel conditions where conductive dust or humidity may be present. The 2 NO + 2 NC contact arrangement gives you one NO and one NC on each of two current paths, per the factory wiring scheme.","metaTitle":"Siemens 3RH2911-1HA22-ZW98 Auxiliary Switch, 2NO+2NC, 10A","metaDescription":"Siemens SIRIUS auxiliary switch block 3RH2911-1HA22-ZW98, 2 NO + 2 NC contacts, rated 10 A max, snap-on DIN rail mount, IP20 front.","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-ZW98","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, multi-unit packaging, pack = 60 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/23f761121e60043ac2b54d1e8cc622bb.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=271291&mlfb=3RH2911-1HA22-ZW98"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1HA22-ZW98","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-ZW98 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}}