{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1911-1FA22-ZW97","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1911-1FA22-ZW97","canonicalUrl":"https://aoctrl.com/siemens/3RH1911-1FA22-ZW97","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1FA22-ZW97","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, 3RH1911-1FA22-ZW97, 2 NO + 2 NC contacts, screw-type terminals, 10 A max, snap-on mounting for size S00 contactors.","salesMarkdown":"It provides 2 normally open and 2 normally closed instantaneous contacts in a single block, with screw-type terminals for the auxiliary and control circuit wiring. The block snaps onto the front of size S00 contactors — no tools needed for the mechanical install, just align and push down on the DIN-rail-mounted contactor. The contacts are rated for a maximum continuous current of 10 A, but the real-world switching capacity depends on the voltage and load type. At 24 V DC the contacts handle 6 A; at 125 V DC it's also 6 A, but at 220 V DC that drops to 0.3 A — DC arcs are harder to extinguish, so the rating falls fast as voltage climbs. For AC loads at 230 V the contacts carry 6 A, and at 400 V they carry 3 A. These are the values that govern whether the block can switch the specific pilot device, relay coil, or indicator lamp in your circuit — the 10 A figure is the thermal limit, not the switching capability at every voltage. ## Mounting and wiring — panel-builder notes The block measures 36.5 mm wide, 37.5 mm high, and 41.5 mm deep — it adds minimal depth to the contactor face. The screw terminals accept two conductors per clamp: either 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) with core-end processing, or the AWG equivalents of 2x (20 to 16) and 2x (18 to 14). ## Contact reliability and service life If your circuit runs at those levels, the block is designed to handle it. Surge voltage resistance is rated at 6 kV, and the insulation voltage at pollution degree 3 is 690 V AC.","metaTitle":"Siemens 3RH1911-1FA22-ZW97 SIRIUS Auxiliary Switch Block, 2","metaDescription":"Siemens SIRIUS 3RH1911-1FA22-ZW97 auxiliary switch block, 2 NO + 2 NC contacts, 10 A max, screw terminals, snap-on mounting. Phased-out; successor is SIRIUS 3RH2. 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":"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,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=493207&mlfb=3RH1911-1FA22-ZW97","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1FA22-ZW97/alternatives.json"},"ai":{"faq":[{"question":"What replaces the 3RH1911-1FA22-ZW97?","answer":"The official successor is the SIRIUS 3RH2 series. You will need to verify the mounting footprint, terminal layout, and contact ratings of the specific 3RH2 order code against your panel design before substituting."},{"question":"What is the contact configuration of this block?","answer":"It provides 2 normally open and 2 normally closed instantaneous contacts, wired via screw-type terminals."},{"question":"What are the key contact ratings I need to check for fit?","answer":"Maximum continuous current is 10 A. At 24 V DC the contacts switch 6 A; at 125 V DC also 6 A; at 220 V DC it drops to 0.3 A. For AC at 230 V the rating is 6 A; at 400 V it is 3 A. These are the values that determine whether the block can handle your specific load."},{"question":"Does this block fit size S00 contactors?","answer":"Yes. It is designed for snap-on mounting onto the front of size S00 contactors, per the manufacturer's suitability listing for contactor relays and power contactors."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1911-1FA22-ZW97","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/3RH1911-1FA22-ZW97 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}}