{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1AA01-ZX90","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1AA01-ZX90","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1AA01-ZX90","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1AA01-ZX90","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch, 3RH2911-1AA01-ZX90, 1 NC, front-mount, screw terminals, for 3RT2 contactors and 3RH2 contactor relays, 10 A max, IP20, snap-on mounting.","salesMarkdown":"The Siemens 3RH2911-1AA01-ZX90 is a front-mounted auxiliary switch block carrying one normally-closed (NC) contact, wired through screw terminals with cable entry from the top. It snaps onto SIRIUS 3RT2 contactors and 3RH2 contactor relays — the \"with 3RH2\" note on the line means this variant is specifically packaged and tested for that relay family, though the mounting interface is shared across the 3RT2/3RH2 platform. Rated for a maximum of 10 A, with the AC-15 utilization category carrying 1 A at 690 V. The mechanical service life is rated at 10 million switching cycles, and contact reliability is specified at 1 faulty switching per 100 million operations at 17 V, 1 mA — a figure that matters for PLC-level signal integrity in low-energy circuits. The 10 A maximum is the thermal current (Ith) — the continuous carry capacity through the closed contact. The real switching limits depend on voltage and load type: at 24 V DC the contact handles 6 A, at 60 V DC it drops to 2 A, and at 220 V DC it's only 0.3 A. For AC loads the AC-15 rating at 690 V is 1 A — that's the inductive solenoid/contactor coil switching duty. The insulation coordination is rated for 690 V AC with pollution degree 3, and surge voltage resistance is 6 kV. That puts it in the standard industrial control panel range — no special derating needed for most 400 V or 480 V environments, but verify if your panel sees repeated surges above 6 kV. Snap-on mounting to the front of the contactor or relay — no tools, no DIN rail footprint consumed. The auxiliary switch adds 23.6 mm width, 27.5 mm height, and 38.6 mm depth to the assembly. Screw terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) with core end processing, or 2x (20 to 16 AWG) or 2x (18 to 14 AWG) for stranded wire.","metaTitle":"Siemens 3RH2911-1AA01-ZX90 Auxiliary Switch, 1 NC, 10 A, SIR","metaDescription":"Siemens 3RH2911-1AA01-ZX90 SIRIUS auxiliary switch, 1 NC contact, 10 A max, snap-on for 3RT2/3RH2 contactors. 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":"38.6 mm","Width":"23.6 mm","Height":"27.5 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 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/947d3ee2d9007194bc53f33b0ee875dd.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=446494&mlfb=3RH2911-1AA01-ZX90","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1AA01-ZX90/alternatives.json"},"ai":{"faq":[{"question":"What is the note 'with 3RH2' on this part?","answer":"The note indicates this auxiliary switch variant is packaged and tested for use with 3RH2 contactor relays, though the mounting interface is shared with 3RT2 contactors as well."},{"question":"What are the key ratings for 3RH2911-1AA01-ZX90?","answer":"Maximum thermal current is 10 A. DC switching limits: 6 A at 24 V, 2 A at 60 V, 0.3 A at 220 V. AC-15 rating is 1 A at 690 V. Mechanical life is 10 million cycles. Insulation voltage is 690 V AC with pollution degree 3, surge resistance 6 kV."},{"question":"Where can I buy 3RH2911-1AA01-ZX90 and get current pricing?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm quote."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1AA01-ZX90","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/3RH2911-1AA01-ZX90 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}}