{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1GA04-ZW98","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1GA04-ZW98","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1GA04-ZW98","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1GA04-ZW98","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2911-1GA04-ZW98 auxiliary switch block, 4 NC contacts, screw terminals, 10 A maximum, AC-15 rated, snap-on DIN rail mounting, IP20 front.","salesMarkdown":"## What this auxiliary switch block does The Siemens 3RH2911-1GA04-ZW98 is a front-mounted auxiliary switch block with four normally-closed (NC) contacts, wired as separate current paths 51/52, 61/62, 71/72, and 81/82. It is designed specifically for use with SIRIUS contactor relays 3RH2140 and 3RH2440, per EN 50011, and is physically coded to prevent mismounting. Rated 10 A maximum, with AC-15 switching capacity varying by voltage: 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V. For DC control circuits, the rated values drop to 0.5 A at 440 V and 0.26 A at 600 V — important when specifying for DC coil circuits or low-voltage interlock loops. ## Mounting and panel fit Snap-on mounting to DIN rail, 36 mm wide, 43.7 mm deep, 37.5 mm tall. The IP20 front protection means it is suitable for enclosed panels where the front face is not exposed to washdown or dust ingress. Screw-type terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) conductors, or 2x (20 to 16) AWG. Insulation voltage rated 690 V AC at pollution degree 3, with surge voltage resistance of 6 kV — this covers standard 400 V line-to-line industrial panels with adequate clearance. ## Lifecycle and sourcing Mechanical service life is 10 million switching cycles typical, with contact reliability of 1 faulty switching per 100 million operations at 17 V, 1 mA — suitable for PLC input dry-contact circuits where low-level switching reliability matters.","metaTitle":"Siemens 3RH2911-1GA04-ZW98 SIRIUS Auxiliary Switch, 4 NC","metaDescription":"Siemens 3RH2911-1GA04-ZW98 SIRIUS auxiliary switch block, 4 NC contacts, 10 A max, AC-15 rated, snap-on DIN rail. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Note":"with 3RH2","Depth":"43.7 mm","Width":"36 mm","title":"3RH2911-1GA04-ZW98","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","description":"auxiliary switch, on the front, 4 NC, 51/52, 61/62, 71/72, 81/82, current path: 1 NC, 1 NC, 1 NC, 1 NC, screw terminal, physically coded, only with contactor relays 3RH2140 and 3RH2440 combinable (according to EN 50011), multi-unit packaging, pack = 60 units","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), 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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/724b72475f8024f0d63fad7acfb6321d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=774109&mlfb=3RH2911-1GA04-ZW98"},"ai":{"faq":[{"question":"What contactor relays does this auxiliary switch fit?","answer":"It mounts on the front of SIRIUS contactor relays 3RH2140 and 3RH2440 only. The physical coding prevents installation on other relay sizes."},{"question":"What are the AC-15 current ratings at common voltages?","answer":"At 24 V: 10 A; at 230 V: 6 A; at 400 V: 3 A; at 690 V: 1 A. For DC circuits, the rated values are lower: 0.5 A at 440 V and 0.26 A at 600 V."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1GA04-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/3RH2911-1GA04-ZW98 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}