{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU1126-4CD1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU1126-4CD1","canonicalUrl":"https://aoctrl.com/siemens/3RU1126-4CD1","factsUrl":"https://aoctrl.com/api/mcp/products/3RU1126-4CD1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, 3RU1126-4CD1, size S0, Trip Class 10, 3-pole, screw-type main terminals, IP20 front protection.","salesMarkdown":"Mounts stand-alone on a vertical surface with ±135° rotation and ±45° tilt front-to-back. The 96 mm depth and 45 mm width fit standard S0 contactor footprints — direct coupling to a 3RT2 contactor is the typical panel layout. Main current circuit uses screw-type terminals accepting 1x (16…12) or 1x (14…8) AWG. Auxiliary and control circuit uses Cage Clamp terminals for 2x (20…14) AWG. Solid conductors up to 2x (0.5…2.5 mm²) and finely stranded with ferrule up to 2x (0.5…1.5 mm²) are supported. Per-pole power dissipation is 2.7 W. Operating temperature range -20 to +70 °C; storage and transport -55 to +80 °C. Relative humidity up to 100% during operation. Shock resistance 8g / 10 ms. Surge voltage resistance rated at 6 kV. IP20 protection on the front. ATEX approval for explosive atmospheres (DMT 98 ATEX G 001). RoHS compliance date 07/01/2006. Lifecycle status is current production. Auxiliary contacts rated: 1 A at 24 V, 0.22 A at 110 V, 3 A at 120 V, 0.22 A at 125 V, 0.11 A at 220 V, 2 A at 230 V, 1 A at 400 V. These are the switching capacities for the built-in auxiliary contacts used for signaling or control interlocking.","metaTitle":"Siemens 3RU1126-4CD1 SIRIUS Thermal Overload Relay, Class 10","metaDescription":"Siemens 3RU1126-4CD1 SIRIUS thermal overload relay, Trip Class 10, size S0, 3 poles, IP20 front. Current production. Sourced to order against RFQ.","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":"2.7 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":"8.1 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"17 ... 22 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=274407&mlfb=3RU1126-4CD1","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RU1126-4CD1/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RU1126-4CD1?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the Trip Class of 3RU1126-4CD1?","answer":"Trip Class 10, meaning it will trip within 10 seconds at 7.2× the set current — standard for general-purpose motor protection."},{"question":"What is the depth of 3RU1126-4CD1?","answer":"96 mm depth, 45 mm width, 97 mm height. Fits standard S0 contactor footprints."},{"question":"What compliance documentation does 3RU1126-4CD1 carry?","answer":"ATEX approval DMT 98 ATEX G 001 for explosive atmospheres, RoHS compliance from 07/01/2006, IP20 front protection, and surge voltage resistance 6 kV."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU1126-4CD1","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/3RU1126-4CD1 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}}