{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1GA31-ZW98","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1GA31-ZW98","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1GA31-ZW98","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1GA31-ZW98","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, auxiliary switch, 3RH2911-1GA31-ZW98, 3 NO + 1 NC, 10 A max, IP20, snap-on mounting.","salesMarkdown":"It gives you 3 normally-open and 1 normally-closed contact set (3 NO + 1 NC), wired to screw terminals. The contacts are physically coded so they only fit with 3RH2140 and 3RH2440 contactor relays per EN 50011 — no guessing if it'll line up on the wrong base. Rated for a maximum of 10 A, this switch handles control-circuit loads across a range of voltages. At 24 V it's rated 6 A, at 110 V it's 1 A, and at 400 V it's 3 A. Snap-on mounting onto the contactor relay keeps installation quick — no tools needed beyond a screwdriver for the screw terminals. The AC-15 rating at 690 V is 1 A. AC-15 covers electromagnetic loads like contactor coils, so this switch can reliably break that inductive kick without welding contacts. Mechanical service life is 10 million switching cycles typical. That's a lot of operations — for a machine that cycles once every 10 seconds, that's over three years of continuous duty before the mechanism wears out. That's important for PLC-level signals where a dry circuit might not burn through oxide — this switch handles low-energy logic reliably. ## Integration notes The screw terminals accept 2x (0.5... 1.5 mm²) or 2x (0.75... 2.5 mm²) with core end processing, or AWG 20-16 and 18-14. Strip length and ferrule sizing follow standard practice for the terminal class. Dimensions are 36 mm wide, 37.5 mm high, 43.7 mm deep. Fine for most indoor panels; if the cabinet sees direct sun or a heat source, check the ambient stays under 60 °C.","metaTitle":"Siemens 3RH2911-1GA31-ZW98 SIRIUS Auxiliary Switch, 3 NO + 1","metaDescription":"Siemens SIRIUS 3RH2911-1GA31-ZW98 auxiliary switch, 3 NO + 1 NC contacts, 10 A max, IP20, snap-on mounting. Active production. Request quote for pricing and availability.","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","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":"3","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/3061e0d6229d625c50dfabcb1a919871.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=458046&mlfb=3RH2911-1GA31-ZW98","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1GA31-ZW98/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RH2911-1GA31-ZW98?","answer":"The 3RH2140-1BP40 is a contactor relay that accepts this auxiliary switch. But the 3RH2911-1GA31-ZW98 is the switch block itself, not the relay — you need the base relay to mount it on. The switch is physically coded for 3RH2140 and 3RH2440 bases only, so it won't fit other contactor relay families without rewiring."},{"question":"What is 3RH2911-1GA31-ZW98's listed note 'with 3RH2'?","answer":"The note 'with 3RH2' indicates this auxiliary switch is designed for use with the 3RH2 series contactor relays. It physically codes to fit only 3RH2140 and 3RH2440 bases."},{"question":"What is 3RH2911-1GA31-ZW98's listed depth?","answer":"The depth is 43.7 mm. That's the dimension from the mounting face to the front of the screw terminals."},{"question":"Will 3RH2911-1GA31-ZW98 drop into a panel specified around 3RH2140-1BP40 without rewiring?","answer":"Yes, the switch is physically coded to fit the 3RH2140 contactor relay, so it mounts directly. The screw terminals are the same type, so no rewiring is needed if the existing wiring matches the terminal sizes (0.5-2.5 mm² or AWG 20-14)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1GA31-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/3RH2911-1GA31-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}}