{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1911-2FA22","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1911-2FA22","canonicalUrl":"https://aoctrl.com/siemens/3RH1911-2FA22","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1911-2FA22","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch, 3RH1911-2FA22, 2 N/O, snap-on front mount for S00 contactors, AC-15 rated 10 A at 24 V, 6 kV surge voltage resistance, IP20 front.","salesMarkdown":"It adds two instantaneous N/O contacts to the base device, giving you feedback or interlock signals without increasing panel depth beyond the 46 mm the switch itself takes up. Rated for AC-15 duty (solenoid and electromagnetic loads), it handles 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V. For DC switching, the curve drops: 6 A at 24 V, 2 A at 48/60 V, 1 A at 110 V, 0.3 A at 220/250 V. The AC-15 rating at 690 V is 1 A, so it covers control circuits across common line voltages. It's a mirror contact per IEC 60947-4-1 when paired with a 3RT1 contactor — meaning the N/O contact won't weld closed if the main power contacts weld. That makes it usable in safety circuits where you need positive-guided feedback of the contactor state. Snaps onto the front of S00 contactors (3RT1, 3RH1) — the 36.5 mm width and 37.5 mm height keep it within the contactor envelope, so you don't lose a DIN slot. The 46 mm depth adds to the contactor's own depth; check your enclosure depth if you're stacking multiple auxiliaries. Wire termination accepts 2x 0.5–2.5 mm² solid/stranded or 2x 20–14 AWG, with ferruled ends down to 1.5 mm². Strip length is standard for screw-clamp terminals. RoHS compliant per the substance prohibition date of July 1, 2006. The mirror-contact feature satisfies IEC 60947-4-1 requirements for safety-related applications. No UL or CSA listing is stated in the evidence, but the IEC ratings cover most global installations outside North America.","metaTitle":"Siemens 3RH1911-2FA22 SIRIUS Auxiliary Switch, 2 N/O, snap-o","metaDescription":"Siemens 3RH1911-2FA22 SIRIUS auxiliary switch, 2 N/O, snap-on for S00 contactors, AC-15 rated 10 A at 24 V, 6 kV surge, IP20 front. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"46 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 ... 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 ... 14)","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 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","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","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":"spring-loaded 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=231634&mlfb=3RH1911-2FA22","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1911-2FA22/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RH1911-2FA22?","answer":"46 mm, measured from the mounting face to the back of the switch body."},{"question":"Will 3RH1911-2FA22 drop into a panel that was specified around 3RH2122-2BG40?","answer":"The 3RH2122-2BG40 is a different form factor — it's a separate contactor relay, not a snap-on auxiliary. The 3RH1911-2FA22 snaps onto an S00 contactor; it won't physically replace a standalone 3RH2122 without changing the base contactor."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1911-2FA22","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/3RH1911-2FA22 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}}