{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1911-1FA20-ZW98","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1911-1FA20-ZW98","canonicalUrl":"https://aoctrl.com/siemens/3RH1911-1FA20-ZW98","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1FA20-ZW98","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch, S00 size, 2 N/O contacts, snap-on front mounting, 41.5 mm depth, 36.5 mm width, 37.5 mm height.","salesMarkdown":"It adds two instantaneous N/O contacts to the base device, letting you pick up status feedback or extend control logic without extra wiring to a separate terminal block. Snap-on mounting means it clips directly onto the contactor's front face — no tools, no DIN-rail space consumed beyond the contactor itself. ## What the current ratings mean on the line This switch carries a voltage-dependent current table — a sign it's rated for both AC and DC control circuits. At 24 V it handles 6 A; at 230 V it handles 6 A (AC-12?); at 400 V it handles 3 A. The DC curve drops faster: 2 A at 48 V, 1 A at 110 V, 0.3 A at 220 V. For a motor-control center running 24 VDC pilot circuits, the 6 A rating is generous for a handful of PLC outputs or relay coils. At 400 VAC, the 3 A rating covers most contactor holding coils and indicator loads. The AC-12 maximum is 10 A, and the AC-15 rating at 690 V is 1 A — that's the electromagnetic-load curve for contactor coils at higher voltages. The mirror-contact feature per IEC 60947-4-1 (when paired with a 3RT1 contactor) means one N/O contact mechanically follows the main poles, giving a positive-break indication for safety circuits. The block accepts 2 x (0.5 to 1.5 mm²) solid/stranded or 2 x (0.75 to 2.5 mm²) with ferruled ends — standard screw-clamp terminals. AWG equivalents are 2 x (20 to 16) and 2 x (18 to 14).","metaTitle":"Siemens 3RH1911-1FA20-ZW98 SIRIUS Auxiliary Switch, S00, 2 N","metaDescription":"Siemens 3RH1911-1FA20-ZW98 SIRIUS auxiliary switch for S00 contactors. Snap-on front mount, 2 N/O contacts, IP20 front, 10 A AC-12. Active production, sourced to order. Request quo","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"41.5 mm","Width":"36.5 mm","Height":"37.5 mm","at 24 V":"6 A","at 48 V":"2 A","at 60 V":"2 A","at 110 V":"1 A","at 125 V":"0.9 A","at 220 V":"0.3 A","at 230 V":"6 A","at 250 V":"0.3 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 Category":"Auxiliary switch","Size Of Contactor":"S00","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"auxiliary switch","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","Design Of The Product":"for snapping onto the front","Instantaneous Contact":"2","Substance Prohibitance (Date)":"07/01/2006","protection class IP on the front":"IP20","Surge Voltage Resistance Rated Value":"6 kV","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","mirror contact according to IEC 60947-4-1":"Yes; with 3RT1","operational current at AC-15 at 690 V rated value":"1 A","Mechanical Service Life (Operating Cycles) Typical":"10 000 000","operational current of auxiliary contacts at AC-12 maximum":"10 A","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","number of CO contacts of auxiliary contacts instantaneous contact":"0","AWG number as coded connectable conductor cross section for auxiliary contacts":"20 ... 14"}},"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=342375&mlfb=3RH1911-1FA20-ZW98","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1FA20-ZW98/alternatives.json"},"ai":{"faq":[{"question":"What is 3RH1911-1FA20-ZW98's listed depth?","answer":"The depth is 41.5 mm. Width is 36.5 mm, height is 37.5 mm. It snaps onto the front of an S00 contactor and adds no extra depth beyond the contactor's own envelope."},{"question":"What compliance documentation does this part carry?","answer":"The evidence records a RoHS substance prohibition date of 07/01/2006, indicating compliance with the original EU RoHS directive. The mirror-contact feature is certified to IEC 60947-4-1. For UL, CSA, or other agency marks, consult the full datasheet or the Siemens SIRIUS catalog."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1911-1FA20-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/3RH1911-1FA20-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}}