{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1YA21-0MA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1YA21-0MA0","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1YA21-0MA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1YA21-0MA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, 3RH2911-1YA21-0MA0, 2 NO + 1 NC, screw-type terminals, snap-on mounting for 3RT2 contactors and 3RH2 contactor relays, rated 10 A maximum.","salesMarkdown":"The Siemens 3RH2911-1YA21-0MA0 is a front-mounted auxiliary switch block in the SIRIUS family, carrying 2 normally-open and 1 normally-closed contact set (31/32, 43/44, 53/54) with screw-type terminals. It snaps onto 3RT2 power contactors and 3RH2 contactor relays — no tools needed for mounting, just press it onto the front face of the device. Rated for a maximum of 10 A, the contacts are sized for control-circuit switching, not motor loads directly. The AC-15 rating at 690 V is 1 A — that's the inductive load curve for solenoid valves, contactor coils, and pilot lights in a 690 V control scheme. For DC switching, the rated values drop as voltage climbs: 10 A at 24 V DC, 6 A at 125 V DC, and 0.26 A at 600 V DC. The mechanical service life is a typical 10 million switching cycles, which outlasts most contactors it'll ride on. Snap-on mounting means it clips directly to the contactor front without extra hardware — no DIN rail needed for the switch itself, though the contactor it attaches to may be rail-mounted. Dimensions are compact: 36 mm wide, 37.5 mm high, 43.7 mm deep. The 43.7 mm depth includes the screw terminals, so account for that when planning enclosure depth. 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) and 2x (18 to 14) AWG. That covers standard 480 V and 600 V industrial panels with margin.","metaTitle":"Siemens 3RH2911-1YA21-0MA0 Auxiliary Switch, 2 NO + 1 NC, 10","metaDescription":"Siemens SIRIUS auxiliary switch block for 3RT2/3RH2 contactors. 2 NO + 1 NC, screw terminals, snap-on mounting, 10 A max, IP20 front. Active production. Sourced to order against RF","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 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":"2","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/05946e092e38fb4d539a91dff12309bb.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=3716&mlfb=3RH2911-1YA21-0MA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1YA21-0MA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RH2911-1YA21-0MA0 and get a price?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit a request for quote (RFQ) with your quantity and target price; availability and current pricing are confirmed at quote time."},{"question":"What is the 3RH2911-1YA21-0MA0's listed note (with 3RH2)?","answer":"The note indicates this auxiliary switch block is designed to mount on 3RH2 contactor relays and 3RT2 power contactors. It's a front-mounted add-on, not a standalone device."},{"question":"What is the depth of 3RH2911-1YA21-0MA0?","answer":"The depth is 43.7 mm, measured from the mounting face to the back of the screw terminals. Width is 36 mm and height is 37.5 mm."},{"question":"What compliance documentation does Siemens provide for 3RH2911-1YA21-0MA0?","answer":"As a SIRIUS catalog item, Siemens typically provides CE, UKCA, and EAC declarations of conformity, plus RoHS and REACH compliance statements. The rated insulation voltage of 690 V and surge voltage resistance of 6 kV support IEC 60947-5-1 compliance for control circuit devices. Specific certificates are available from Siemens upon request or through your distributor."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1YA21-0MA0","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/3RH2911-1YA21-0MA0 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}}