{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-2GA04-ZW98","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-2GA04-ZW98","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-2GA04-ZW98","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2GA04-ZW98","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, front-mount, 4 NC, spring-loaded terminals, 10 A, snap-on DIN rail, IP20.","salesMarkdown":"The Siemens SIRIUS 3RH2911-2GA04-ZW98 is a front-mounted auxiliary switch block designed for use with SIRIUS contactor relays. It provides four normally closed (NC) switching paths — contacts 51/52, 61/62, 71/72, and 81/82 — for status feedback, interlocking, or control logic in a motor starter or contactor assembly. Rated for a maximum thermal current of 10 A, it handles AC-15 pilot-duty loads up to 1 A at 690 V, and its AC-15 switching capacity at lower control voltages is substantial: 10 A at 24 V, 6 A at 125/230/250 V, and 3 A at 400 V. This makes it suitable for switching contactor coils, relays, and PLC inputs across common control voltages. Spring-loaded terminals accept 2x (0.5 to 1.5 mm²) with ferrules or 2x (0.5 to 2.5 mm²) solid, and 2x (20 to 14 AWG) stranded. The AC-15 rating at 690 V (1 A) is the key figure for pilot-duty switching in 400/690 V industrial networks — it confirms the contacts can reliably switch inductive loads like contactor coils at that voltage without welding. The 6 kV rated surge voltage resistance means the insulation withstands transient overvoltages typical in industrial control panels. The mechanical service life of 10 million switching cycles typical indicates a robust mechanism for high-duty applications. The multi-unit packaging (pack of 50) is the standard ordering quantity for this variant — the -ZW98 suffix denotes the bulk pack. For single-unit needs, the non-ZW98 version of the same switch block is the usual alternative, though the exact order code differs.","metaTitle":"Siemens SIRIUS 3RH2911-2GA04-ZW98 Auxiliary Switch Block, 4","metaDescription":"Siemens SIRIUS auxiliary switch block for contactor relays. 4 NC contacts, spring-loaded terminals, 10 A max, snap-on DIN mount, IP20. Current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Note":"with 3RH2","Depth":"47.7 mm","Width":"36 mm","Height":"41.5 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","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 cables 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","Type Of Electrical Connection For Auxiliary And Control Circuit":"spring-loaded 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/cb648ac650946e2cd040f8a64c71fe51.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=720026&mlfb=3RH2911-2GA04-ZW98","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2GA04-ZW98/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to the 3RH2911-2GA04-ZW98?","answer":"The 3RT1016-2AP02 is a contactor relay from the same SIRIUS family, but it is a different device class — a contactor relay with a coil, not a passive auxiliary switch block. For a pure auxiliary switch replacement, the non-ZW98 version of this same block (without the bulk pack suffix) is the direct equivalent. The 3RT1015-1BB42 and 3RT1017-1AP01 are also contactor relays, not auxiliary switches, so they are not drop-in substitutes for this accessory."},{"question":"What does the note 'with 3RH2' mean?","answer":"It indicates this auxiliary switch block is designed to mount on and physically code with SIRIUS contactor relays of the 3RH2 series — specifically models 3RH2140 and 3RH2440 per EN 50011. It will not fit other contactor frames without adapter hardware."},{"question":"What are the key ratings for this auxiliary switch?","answer":"Maximum thermal current is 10 A. AC-15 rated switching capacity: 10 A at 24 V, 6 A at 125/230/250 V, 3 A at 400 V, and 1 A at 690 V. Surge voltage resistance is 6 kV. Mechanical life is 10 million switching cycles typical."},{"question":"What compliance documentation is available for this part?","answer":"As a Siemens SIRIUS product, it carries CE marking for the European market and is designed to meet relevant IEC/EN standards (EN 50011 for coding, IEC 60947 for switching capacity). Specific RoHS and REACH declarations are available from Siemens upon request. UL/CSA listings are typical for the SIRIUS family but should be confirmed for this specific order code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-2GA04-ZW98","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/3RH2911-2GA04-ZW98 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}}