{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU1126-1KD0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU1126-1KD0","canonicalUrl":"https://aoctrl.com/siemens/3RU1126-1KD0","factsUrl":"https://aoctrl.com/api/mcp/products/3RU1126-1KD0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, 3RU1126-1KD0, S0 size, CLASS 10 trip, screw terminals, 690 V AC-3 max, contactor mounting.","salesMarkdown":"The Siemens 3RU1126-1KD0 is a SIRIUS thermal overload relay, size S0, with CLASS 10 trip characteristics. It mounts directly onto a contactor. The main circuit connects via screw-type terminals, rated for solid conductors 2x (0.5... 2.5 mm²) or AWG 2x (16... 12) / 2x (14... 8). The maximum operating voltage in AC-3 duty is 690 V. Power dissipation in hot operating state is 6.6 W total, or 2.2 W per pole. Shock resistance is rated at 8g for 10 ms, and the relay can be mounted on a vertical surface with ±135° rotation and ±45° tilt forward/backward — flexible positioning for tight enclosures. The ATEX approval (DMT 98 ATEX G 001) means it's certified for use in potentially explosive atmospheres — a common requirement in chemical, oil & gas, and mining applications. Dimensions: 97 mm high, 45 mm wide, 96 mm deep. The S0 size is the smallest frame in the SIRUS overload relay range, designed to pair with S0 contactors. Clearance: 0 mm upwards, forwards, and backwards — it sits flush against the contactor face. Side clearance is 6 mm for heat dissipation between units. The relay has no auxiliary contacts built in — 0 auxiliary contacts for the main current circuit. If you need signal feedback (trip indication or remote reset), you'll add a separate auxiliary contact block that clips onto the relay.","metaTitle":"Siemens 3RU1126-1KD0 SIRIUS Thermal Overload Relay, CLASS 10","metaDescription":"Siemens SIRIUS 3RU1126-1KD0 thermal overload relay, CLASS 10 trip, S0 size, 690 V AC-3 max, contactor mount, IP20 front. Active production. RFQ for sourcing.","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","Maximum":"2 000 m","Upwards":"0 mm","at 24 V":"1 A","Forwards":"0 mm","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","On The Front":"IP20","Mounting type":"Contactor mounting","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-20 ... +70 °C","During Transport":"-55 ... +80 °C","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","For Auxiliary Contacts":"0","Size of overload relay":"S0","For Main Current Circuit":"screw-type terminals","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"6.6 W","Relative humidity during operation":"100 %","at AWG conductors for main contacts":"2x (16 ... 12), 2x (14 ... 8)","Surge voltage resistance rated value":"6 kV","Reference code acc. to DIN EN 81346-2":"F","at AC in hot operating state per pole":"2.2 W","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (20 ... 14)","For Auxiliary And Control Current Circuit":"Cage Clamp terminals","Finely Stranded Without Core End Processing":"2x (0.5 ... 1.5 mm²)","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","Removable Terminal For Auxiliary And Control Circuit":"No","Insulation voltage with degree of pollution 3 rated value":"690 V","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 6 A, quick: 10 A","Adjustable pick-up 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=231145&mlfb=3RU1126-1KD0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RU1126-1KD0/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions for panel layout?","answer":"Height 97 mm, width 45 mm, depth 96 mm. Mounting clearance: 0 mm upwards/forwards/backwards (flush to contactor), 6 mm side clearance between units."},{"question":"What conductor sizes does the main circuit terminal accept?","answer":"Solid conductors: 2x (0.5... 2.5 mm²). AWG equivalents: 2x (16... 12) or 2x (14... 8). Finely stranded with core end processing: 2x (0.5... 1.5 mm²)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU1126-1KD0","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/3RU1126-1KD0 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}}