{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1911-2GA22","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1911-2GA22","canonicalUrl":"https://aoctrl.com/siemens/3RH1911-2GA22","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1911-2GA22","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, 3RH1911-2GA22, 2 NO + 2 NC contacts, spring-loaded terminals, snap-on mounting, 10 A maximum rated current.","salesMarkdown":"The Siemens SIRIUS 3RH1911-2GA22 is a 4-pole auxiliary switch block with 2 normally-open and 2 normally-closed instantaneous contacts, arranged per EN 50011. The contact arrangement gives you one spare NO/NC pair beyond a standard 1 NO + 1 NC auxiliary, useful for dual-feedback or interlocking circuits on a contactor relay or power contactor. ## Rated current — what the numbers mean across the voltage range The block carries a maximum thermal current of 10 A, but the switching capacity depends on the circuit voltage and load type. At 24 V DC the contacts are rated 6 A; at 60 V DC it drops to 2 A; at 110 V DC it's 1 A; at 220 V DC it's 0.3 A. For AC loads at 230 V or 250 V the rating returns to 6 A, and at 400 V AC it's 3 A. The AC-15 rating at 690 V is 1 A — that's the inductive load capability for solenoid valves or contactor coils at higher line voltages. The DC derating curve is steep because DC arcs don't self-extinguish at zero-crossing, so the contact gap and material limit the interrupting capacity. For a 24 V DC control circuit, the 6 A rating covers most PLC output and relay coil loads; for 110 V DC circuits, the 1 A limit means you're restricted to smaller solenoids or signal-level switching. ## Integration notes — panel fit and wiring The block measures 36.5 mm wide, 37.5 mm tall, and 46 mm deep — it occupies roughly the same footprint as a standard contactor relay auxiliary deck. The spring-loaded terminals accept 2 x (0.5 to 1.5 mm²) with ferrule or 2 x (0.5 to 2.5 mm²) solid/stranded without ferrule, and 2 x (20 to 14 AWG). Strip length for the spring cage is typically 8–10 mm. Surge voltage resistance is rated at 6 kV, and the insulation voltage at pollution degree 3 is 690 V AC, so it's suitable for 400 V line-to-line control circuits with proper clearance. Mechanical service life is 10 million switching cycles typical; contact reliability is 1 faulty switching per 100 million operations at 17 V, 1 mA — that's the dry-circuit performance for low-energy signals like PLC inputs.","metaTitle":"Siemens 3RH1911-2GA22 SIRIUS Auxiliary Switch Block, 2 NO +","metaDescription":"Siemens SIRIUS 3RH1911-2GA22 auxiliary switch block. 2 NO + 2 NC contacts, spring-loaded terminals. Rated 10 A max, 6 A at 24 V. Snap-on mounting. Phased-out; successor 3RH2911-2GA","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Note":"with 3RH1","Depth":"46 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","Mounting type":"snap-on mounting","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","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)","Without Core End Processing":"2x (0.5 ... 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 conductors for auxiliary contacts":"2x (20 ... 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","Insulation voltage with degree of pollution 3 at AC rated value":"690 V","Type of electrical connection for auxiliary and control current circuit":"spring-loaded terminals"}},"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=436591&mlfb=3RH1911-2GA22","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1911-2GA22/alternatives.json"},"ai":{"faq":[{"question":"What replaces the 3RH1911-2GA22?","answer":"The preferred successor type is the Siemens SIRIUS 3RH2911-2GA22. It maintains the 2 NO + 2 NC contact configuration and spring-loaded terminal connection."},{"question":"What are the key ratings for the 3RH1911-2GA22?","answer":"Maximum thermal current is 10 A. At 24 V DC it is rated 6 A; at 230 V AC it is rated 6 A; at 400 V AC it is rated 3 A. The AC-15 rating at 690 V is 1 A. Contact configuration is 2 NO + 2 NC instantaneous contacts. Mechanical service life is 10 million switching cycles typical."},{"question":"Does the 3RH1911-2GA22 have spring-loaded or screw terminals?","answer":"It uses spring-loaded terminals for the auxiliary and control current circuits. No screwdriver is required for wiring."},{"question":"What is the mounting method for the 3RH1911-2GA22?","answer":"Snap-on mounting onto 35 mm standard mounting rail per DIN EN 50022. It clips directly onto the rail or onto a contactor relay."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1911-2GA22","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/3RH1911-2GA22 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}}