{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU1126-1KD1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU1126-1KD1","canonicalUrl":"https://aoctrl.com/siemens/3RU1126-1KD1","factsUrl":"https://aoctrl.com/api/mcp/products/3RU1126-1KD1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, 3RU1126-1KD1, size S0, Trip Class 10, screw terminals for main circuit, cage clamp for aux.","salesMarkdown":"Rated for 100 % relative humidity during operation and IP20 on the front, so it lives inside a panel with no special gasketing. Compliance documentation includes ATEX approval (DMT 98 ATEX G 001) for explosive atmospheres, and substance prohibitance per RoHS as of July 1, 2006. Mounts standalone or directly onto a SIRIUS contactor. Clearance: 0 mm upwards, forwards, and backwards; 6 mm at the side; 0 mm downwards — so you can pack it tight against the panel wall or adjacent devices, just leave 6 mm on the side for airflow. Dimensions are 97 mm high, 45 mm wide, 96 mm deep — a compact S0 footprint that fits standard DIN-rail enclosures. Shock resistance is 8g for 10 ms, so it holds up in mobile or high-vibration environments like conveyor drives or pump skids. That's the right choice for standard induction motors that don't need a long start time — a fan or pump that comes up to speed in a few seconds. If your load has a high inertia (like a centrifuge), you'd want a Class 20 or 30, but for most general-purpose motor circuits, Class 10 is the default.","metaTitle":"Siemens 3RU1126-1KD1 SIRIUS thermal overload relay, S0, Clas","metaDescription":"Siemens 3RU1126-1KD1 SIRIUS thermal overload relay, size S0, Trip Class 10, IP20 front, ATEX, active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"96 mm","Solid":"2x (0.5 ... 2.5 mm²)","Width":"45 mm","Height":"97 mm","Upwards":"0 mm","at 24 V":"1 A","Forwards":"0 mm","Per Pole":"2.2 W","at 110 V":"0.22 A","at 120 V":"3 A","at 125 V":"0.22 A","at 220 V":"0.11 A","at 230 V":"2 A","at 400 V":"1 A","Backwards":"0 mm","Downwards":"0 mm","Trip Class":"CLASS 10","At The Side":"6 mm","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-20 ... +70 °C","During Transport":"-55 ... +80 °C","Fastening Method":"stand-alone installation","Shock Resistance":"8g / 10 ms","Mounting Position":"with vertical mounting surface +/-135° rotatable, with vertical mounting surface +/- 45° tiltable to the front and back","Product Brand Name":"SIRIUS","Type Of Protection":"DMT 98 ATEX G 001","Product Designation":"thermal overload relay","Size Of Overload Relay":"S0","For Main Current Circuit":"screw-type terminals","Substance Prohibitance (Date)":"07/01/2006","at AWG cables for main contacts":"1x (16 ... 12), 1x (14 ... 8)","protection class IP on the front":"IP20","For Auxiliary And Control Circuit":"Cage Clamp terminals","Relative Humidity During Operation":"100 %","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 14)","reference code according to IEC 81346-2":"F","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","Touch Protection Against Electrical Shock":"finger-safe","Finely Stranded Without Core End Processing":"2x (0.5 ... 1.5 mm²)","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","Size Of Contactor Can Be Combined Company-Specific":"S0","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 6 A, quick: 10 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Product Component Removable Terminal For Auxiliary And Control Circuit":"No","power loss [W] for rated value of the current at AC in hot operating state":"6.6 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"9 ... 12.5 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=483173&mlfb=3RU1126-1KD1","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RU1126-1KD1/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for this thermal overload relay?","answer":"It's a size S0, Trip Class 10 relay with screw terminals for the main circuit and cage clamp for aux/control. Rated for 100 % humidity, IP20 front, 6 kV surge, and ATEX Zone 2/22."},{"question":"What compliance documentation does the 3RU1126-1KD1 carry?","answer":"It has ATEX approval (DMT 98 ATEX G 001), RoHS compliance per the July 1, 2006 substance prohibitance date, and an IEC 81346-2 reference code of F."},{"question":"What are the mounting clearances for this relay?","answer":"Clearances: 0 mm upwards, forwards, and backwards; 6 mm at the side; 0 mm downwards. Mounting position allows ±135° rotation and ±45° tilt on a vertical surface."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU1126-1KD1","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/3RU1126-1KD1 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}}