{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1FB11-ZW97","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1FB11-ZW97","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1FB11-ZW97","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1FB11-ZW97","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch, front-mount, 1 NO + 1 NC, screw-type terminals, 10 A maximum, snap-on mounting for 3RT2 contactors and 3RH2 contactor relays, multi-unit packaging of 120.","salesMarkdown":"## What this auxiliary switch does in the panel The Siemens 3RH2911-1FB11-ZW97 is a front-mounted auxiliary switch block carrying one normally-open (leading) and one normally-closed (lagging) contact, rated for a maximum of 10 A. It snaps onto 3RT2 power contactors and 3RH2 contactor relays, adding feedback or interlock logic without extra wiring to the main power path. Rated operational current reaches 10 A at 24 V AC/DC, and the AC-15 switching category at 690 V is rated for 1 A — enough for pilot-duty control circuits on motor starters and valve actuators. Snap-on mounting to the contactor or relay front — no tools needed, but verify the latch engages fully before energizing. The screw-type terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) with core end processing, or AWG 20–16 and 18–14 for the auxiliary circuits. Dimensions are 36 mm wide, 37.5 mm tall, and 43.7 mm deep — it sits flush on the contactor face and does not increase the panel depth beyond the contactor body.","metaTitle":"Siemens 3RH2911-1FB11-ZW97 Auxiliary Switch, 1NO+1NC, 10A, S","metaDescription":"Siemens SIRIUS 3RH2911-1FB11-ZW97 auxiliary switch, front-mount, 1NO+1NC, 10A max, screw terminals, snap-on for 3RT2/3RH2. Active production. Quoted to order.","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","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","Leading Contact":"1","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","Lagging Switching":"1","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":"0","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":"https://cdn.aoctrl.com/0003a01ebbe045eab5b6f504fb7d86be.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=74440&mlfb=3RH2911-1FB11-ZW97","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1FB11-ZW97/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RH2911-1FB11-ZW97 and get a price?","answer":"This part is available to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time."},{"question":"What contact configuration does this switch provide?","answer":"It provides one normally-open (leading) and one normally-closed (lagging) contact — 1 NO + 1 NC — with screw-type terminals. The NO contact closes before the NC opens during actuation."},{"question":"What is the maximum current rating of 3RH2911-1FB11-ZW97?","answer":"The maximum rated operational current is 10 A. At 24 V the rated value is also 10 A; at 230 V it is 6 A; at 400 V it drops to 3 A. For AC-15 duty at 690 V the rating is 1 A."},{"question":"Does this auxiliary switch fit 3RT2 contactors?","answer":"Yes, it is designed for snap-on mounting to Siemens 3RT2 power contactors and 3RH2 contactor relays. The front-mount form factor matches the contactor face without additional brackets."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1FB11-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/3RH2911-1FB11-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}}