{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1FA40-ZW98","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1FA40-ZW98","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1FA40-ZW98","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1FA40-ZW98","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2911-1FA40-ZW98 auxiliary switch block, 4 NO contacts, 10 A maximum, screw-type terminals, snap-on DIN rail mounting, IP20 front, 43.7 mm depth.","salesMarkdown":"## Front-Mounted Auxiliary Switch for SIRIUS Contactors The 3RH2911-1FA40-ZW98: This is a front-mounted auxiliary switch block for the Siemens SIRIUS line, designed to snap onto 3RT2 contactors and 3RH2 contactor relays. It adds 4 normally-open (NO) instantaneous switching contacts to the base device, wired through screw-type terminals. Rated for 10 A maximum, with specific current ratings across AC voltages: 6 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V. For DC control circuits, it handles 10 A at 24 V, 3 A at 110 V, and 0.5 A at 440 V. ## What the Ratings Mean for Panel Fit The 36 mm width and snap-on DIN rail mounting mean it takes up one standard module on the rail — no extra panel space beyond the contactor footprint. The 43.7 mm depth keeps it inside the envelope of most 3RT2/3RH2 assemblies, so it won't crowd the enclosure door or adjacent wiring ducts. Screw terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) conductors — that's 20–16 AWG and 18–14 AWG respectively. The dual-wire entry per clamp is useful for daisy-chaining common signals without a separate terminal block. Contact reliability is specified at 1 faulty switching per 100 million operations at 17 V and 1 mA — that's the dry-circuit performance for PLC-level signals. Mechanical life is 10 million switching cycles typical.","metaTitle":"Siemens 3RH2911-1FA40-ZW98 Auxiliary Switch, 4 NO, 10 A","metaDescription":"Siemens SIRIUS auxiliary switch block, 4 NO contacts, 10 A max, 690 V insulation, screw terminals, snap-on DIN rail. 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":"3RH2911-1FA40-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, 4 NO,.3/.4,.3/.4,.3/.4,.3/.4, current path: 1 NO, 1 NO, 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":"4","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/c5903663f3dc1152c80ae3b409b7e0b0.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=538116&mlfb=3RH2911-1FA40-ZW98"},"ai":{"faq":[{"question":"What is the 3RH2911-1FA40-ZW98 used for?","answer":"It's an auxiliary switch block that mounts on the front of Siemens SIRIUS 3RT2 contactors or 3RH2 contactor relays, adding 4 NO contacts for signaling or control logic. The screw terminals handle wire from 0.5 to 2.5 mm², and it snaps onto a DIN rail as part of the contactor assembly."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1FA40-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/3RH2911-1FA40-ZW98 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}