{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-4DA11","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-4DA11","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-4DA11","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-4DA11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch, lateral, 1 NO + 1 NC, 10 A maximum, ring cable lug connection, for 3RT2 contactors.","salesMarkdown":"The Siemens 3RH2911-4DA11 is a SIRIUS lateral auxiliary switch block designed to snap onto the left or right side of a 3RT2 contactor. It gives you one normally-open and one normally-closed instantaneous contact, with ring-tongue terminals for the control wiring. This is the add-on that lets a power contactor report its state back to a PLC or safety circuit. The contacts are rated for a maximum of 10 A, with the actual current-carrying capacity depending on the voltage and duty cycle — at 24 V it handles 6 A (AC-15), at 230 V it also handles 6 A, and at 400 V it drops to 3 A. For DC switching, the ratings are lower: 10 A at 24 V, 4.7 A at 60 V, and 0.26 A at 600 V. That matters when you're feeding a 24 VDC PLC input on a conveyor line. The block is 10 mm wide, 85.4 mm tall, and 43.7 mm deep — it adds barely a finger's width to the contactor assembly. The front is IP00, so it lives inside an enclosure; no washdown exposure out here in the grease. Termination is via ring-tongue lugs on the control circuit. That's a field-proven connection for maintenance crews — no tiny spring-cage to fight with gloved hands. Strip, crimp, torque, and it stays put through vibration. No official successor has been announced — this is the active design.","metaTitle":"Siemens 3RH2911-4DA11 SIRIUS Auxiliary Switch, 1 NO + 1 NC,","metaDescription":"Siemens SIRIUS 3RH2911-4DA11 lateral auxiliary switch for 3RT2 contactors. 1 NO + 1 NC, 10 A max, ring lug connection. Current production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Note":"with 3RT2","Depth":"43.7 mm","Width":"10 mm","Height":"85.4 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":"1","at AC-15 at 690 V rated value":"1 A","protection class IP on the front":"IP00","Surge Voltage Resistance Rated Value":"6 kV","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":"ring terminal lug connection","insulation voltage with degree of pollution 3 at AC rated value":"690 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.11","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=202834&mlfb=3RH2911-4DA11","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2911-4DA11/alternatives.json"},"ai":{"faq":[{"question":"What does the 'with 3RT2' note mean?","answer":"It means this auxiliary switch block is designed to mount directly onto Siemens 3RT2 series contactors. It snaps onto the left or right side and connects mechanically to the contactor's armature."},{"question":"What are the key current ratings for this auxiliary switch?","answer":"The maximum rated current is 10 A. For AC-15 duty at 24 V it handles 6 A, at 230 V it handles 6 A, and at 400 V it handles 3 A. For DC switching at 24 V it handles 10 A, at 60 V it handles 4.7 A, and at 600 V it handles 0.26 A."},{"question":"What type of connection does this switch use?","answer":"It uses ring-tongue lug terminals for the auxiliary and control circuit connections. This is a screw-type termination that requires a ring terminal crimped onto the wire."},{"question":"What is the physical size of this auxiliary switch block?","answer":"The block is 10 mm wide, 85.4 mm high, and 43.7 mm deep. It mounts via snap-on onto a 35 mm DIN rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-4DA11","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/3RH2911-4DA11 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}}