{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1911-1FA02-ZW98","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1911-1FA02-ZW98","canonicalUrl":"https://aoctrl.com/siemens/3RH1911-1FA02-ZW98","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1FA02-ZW98","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, 3RH1911-1FA02-ZW98, 2 NC contacts per EN 50005, screw terminals, size S00, IP20, 10 A max, snap-on mounting.","salesMarkdown":"It carries a maximum thermal current of 10 A, with the actual switching capacity depending on the circuit voltage — for example, 6 A at 24 V AC/DC, 3 A at 110 V, and 0.3 A at 220 V. The screw-type terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or ferruled stranded wire, or the AWG equivalents 2x (20–16) and 2x (18–14). Mechanical life is rated at 10 million switching cycles typical, and contact reliability is specified as 1 faulty switching per 100 million operations at 17 V, 1 mA — a figure that matters for low-energy PLC inputs where oxide films on dry contacts can cause intermittents. Snap-on mounting onto the contactor or contactor relay — no tools needed, no DIN rail required. The block adds 36.5 mm width and 41.5 mm depth to the S00 base unit. Front-side protection class is IP20, so it is suitable for enclosed panels where the operator does not contact live parts. The 10 A maximum is the unrestricted thermal current (Ith). The real limit is the AC-15 utilization category at 690 V: 1 A. That is the rating that governs switching of electromagnetic loads like contactor coils and solenoid valves. For DC switching, the voltage-dependent current table gives the safe break capacity — for a 24 V DC inductive load, the contact is rated at 6 A; at 60 V DC it drops to 2 A; at 220 V DC it is only 0.3 A. If your circuit operates above these DC values, the contacts may not interrupt the arc reliably. The contact reliability figure (1 failure per 100 million at 17 V, 1 mA) confirms the block is suitable for dry-signal PLC inputs where gold-plated contacts are not used.","metaTitle":"Siemens 3RH1911-1FA02-ZW98 SIRIUS Auxiliary Switch Block, 2","metaDescription":"Siemens SIRIUS 3RH1911-1FA02-ZW98 auxiliary switch block, 2 NC contacts, 10 A max, IP20, snap-on S00. Phased out; successor 3RH2 series. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Note":"with 3RH1","Depth":"41.5 mm","Width":"36.5 mm","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","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","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":"0","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,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=229202&mlfb=3RH1911-1FA02-ZW98","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1FA02-ZW98/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RH1911-1FA02-ZW98?","answer":"Availability and current pricing are confirmed at quote time against an RFQ. This part is sourced through independent distribution channels as new old-stock or surplus."},{"question":"What is the closest functional replacement for 3RH1911-1FA02-ZW98?","answer":"The official successor is the SIRIUS 3RH2 series auxiliary switch blocks. The 3RH2122-1WB40 is a peer in the same S00 size with 2 NO + 2 NC contacts, 10 A thermal, and the same screw terminal pattern — but it is a coupling relay with a DC coil, not a passive switch block. For a direct passive replacement, look at the 3RH2 blocks with the same contact configuration (2 NC) and mounting footprint."},{"question":"Will 3RH1911-1FA02-ZW98 drop into a panel that was specified around 3RT5064-6AP36-0TH0 without rewiring?","answer":"No. The 3RT5064-6AP36-0TH0 is a frame-size S6 power contactor rated at 110 kW at 400 V. The 3RH1911-1FA02-ZW98 is a size S00 auxiliary block and cannot mount onto an S6 contactor. The two parts are not mechanically compatible."},{"question":"What is the rated insulation voltage and surge protection of this block?","answer":"Rated insulation voltage is 690 V AC at pollution degree 3. Surge voltage resistance is 6 kV."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1911-1FA02-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/3RH1911-1FA02-ZW98 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}}