{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1FA22-ZW97","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1FA22-ZW97","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1FA22-ZW97","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1FA22-ZW97","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch, 3RH2911-1FA22-ZW97, 2 NO instantaneous contacts, snap-on front mount for contactor sizes S00, S0, S2, S3, IP20 front, 6 kV surge voltage resistance.","salesMarkdown":"The Siemens SIRIUS 3RH2911-1FA22-ZW97 is an auxiliary switch block that snaps onto the front of contactor relays and power contactors in sizes S00, S0, S2, and S3. It carries 2 normally-open instantaneous contacts, rated for AC-15 pilot duty at 690 V at 1 A, and is designed to signal or interlock the main contactor's state in a control panel. The 6 kV surge voltage resistance means this switch block can handle transient spikes common in industrial motor circuits without welding or failing — important when it's wired into the same panel as a contactor switching inductive loads. It's a mirror contact per IEC 60947-4-1 when used with a 3RT2 contactor, meaning the NO contact's position positively reflects the main contactor's welded or open state. That's a safety-relevant feature for applications where you need a reliable feedback signal to a safety circuit or PLC input. The AC-15 rating at 690 V at 1 A covers the typical control-circuit voltage for a 400 V motor drive panel. At lower voltages the switch can handle more current: 10 A at 24 V, 4.7 A at 60 V, 3 A at 110 V, 1.2 A at 220 V, and 0.5 A at 440 V. Snaps onto the front of the contactor — no tools needed, no DIN-rail space consumed beyond the contactor itself. The block is 36 mm wide, 37.5 mm tall, and 43.7 mm deep, so it adds minimal depth to the contactor assembly. Terminals accept 2x (0.5 to 1.5 mm²) solid or stranded, or 2x (0.75 to 2.5 mm²) with ferrules, and the AWG equivalents are 2x (20 to 16) and 2x (18 to 14).","metaTitle":"Siemens SIRIUS 3RH2911-1FA22-ZW97 Auxiliary Switch, 2 NO, 43","metaDescription":"Siemens SIRIUS 3RH2911-1FA22-ZW97 auxiliary switch, 2 instantaneous contacts, snap-on for contactor sizes S00-S3. IP20 front, 6 kV surge, mirror contact per IEC 60947-4-1. Current","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"43.7 mm","Width":"36 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","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","Product Category":"Auxiliary switch","Lagging Switching":"0","Size Of Contactor":"S00, S0, S2, S3","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)":"10/01/2009","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)","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 3RT2","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=298628&mlfb=3RH2911-1FA22-ZW97","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1FA22-ZW97/alternatives.json"},"ai":{"faq":[{"question":"What contactor sizes does this auxiliary switch fit?","answer":"It snaps onto the front of contactor relays and power contactors in sizes S00, S0, S2, and S3 from the SIRIUS family."},{"question":"What are the key dimensions of this switch block?","answer":"The block measures 36 mm wide, 37.5 mm tall, and 43.7 mm deep."},{"question":"Does this switch provide a mirror contact for safety applications?","answer":"Yes, it is a mirror contact according to IEC 60947-4-1 when used with a 3RT2 contactor, providing positive feedback of the main contactor's state."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1FA22-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/3RH2911-1FA22-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}}