{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-4GA04","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-4GA04","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-4GA04","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-4GA04","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, 4 NC, front-mount, ring cable connection, 10 A thermal, 43.7 mm depth.","salesMarkdown":"The Siemens SIRIUS 3RH2911-4GA04 is a front-mounted auxiliary switch block carrying four normally-closed (NC) contacts — terminals 51/52, 61/62, 71/72, 81/82 — with ring-cable-lug connection and physical coding per EN 50011. It is designed exclusively for use with SIRIUS contactor relays 3RH2140 and 3RH2440; it will not mechanically or electrically mate with other contactor sizes. Rated for a maximum thermal current of 10 A, with AC-15 switching capacity that varies by operating voltage: 10 A at 24 V, 6 A at 125/230/250 V, 4.7 A at 60 V, 3 A at 110/400 V, 1.2 A at 220 V, 0.5 A at 440 V, and 0.26 A at 600 V. The 6 kV surge voltage resistance and 690 V insulation rating (pollution degree 3) suit it for 400 V line-to-line control circuits in industrial panels. The 36 mm width (3 TE) and 43.7 mm depth fit standard enclosure layouts, though the IP00 front protection means the switch block must be housed inside a closed panel or cabinet; it is not rated for exposed or washdown environments. ## Switching reliability and mechanical endurance The typical mechanical service life of 10 million operating cycles means the block outlasts most contactor relays it mounts on.","metaTitle":"Siemens 3RH2911-4GA04 SIRIUS Auxiliary Switch, 4 NC, 10 A","metaDescription":"Siemens SIRIUS auxiliary switch block 3RH2911-4GA04, 4 NC contacts, 10 A thermal, snap-on DIN rail. AC-15 ratings by voltage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Note":"with 3RH2","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":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","Lagging Switching":"0","Product Brand Name":"SIRIUS","Suitability For Use":"Contactor relay","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","at AC-15 at 690 V rated value":"1 A","protection class IP on the front":"IP00","Surge Voltage Resistance Rated Value":"6 kV","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Mechanical Service Life (Operating Cycles) Typical":"10 000 000","Type Of Electrical Connection For Auxiliary And Control Circuit":"ring cable connection","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/6c620a7748bef0c6d5500b91ff27ad72.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=352611&mlfb=3RH2911-4GA04","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2911-4GA04/alternatives.json"},"ai":{"faq":[{"question":"What is the 3RH2911-4GA04's note 'with 3RH2'?","answer":"The note 'with 3RH2' refers to the physical coding and compatibility: this auxiliary switch block is designed to mount only on SIRIUS contactor relays 3RH2140 and 3RH2440 (size S00). It will not fit other contactor sizes."},{"question":"What is the depth of the 3RH2911-4GA04?","answer":"The depth is 43.7 mm, with a width of 36 mm and height of 37.5 mm."},{"question":"Where can I buy the 3RH2911-4GA04?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What compliance documentation does Siemens provide for the 3RH2911-4GA04?","answer":"The part carries a 690 V insulation rating (pollution degree 3) and 6 kV surge voltage resistance, consistent with IEC 60947-5-1 requirements for auxiliary contact blocks. RoHS and REACH compliance is standard for current SIRIUS production, though specific declarations should be requested at order."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-4GA04","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/3RH2911-4GA04 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}}