{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU2126-4CC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU2126-4CC0","canonicalUrl":"https://aoctrl.com/siemens/3RU2126-4CC0","factsUrl":"https://aoctrl.com/api/mcp/products/3RU2126-4CC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, size S0, CLASS 10, 690 V rated, 22 A at 480/600 V, 11 kW at 400/500 V, spring-loaded terminals, integrated auxiliary switch.","salesMarkdown":"It mounts directly to a contactor (contactor mounting) and uses spring-loaded terminals for the main circuit. The CLASS 10 trip class means it will trip within 10 seconds at 7.2× the set current — standard for standard-duty motor starting, not for high-inertia loads that need CLASS 20 or 30. Rated voltage is 690 V, with AC-3e switching rated up to that same 690 V. At 400 V it handles 11 kW; at 480 V and 600 V it carries 22 A; at 690 V it handles 18.5 kW. The auxiliary switch is integrated — no add-on block needed for a remote trip signal. The thermal release design compensates for ambient temperature from -40 to +60 °C, so it won't nuisance-trip in a hot panel or cold warehouse. ## Integration notes Spring-loaded terminals accept 2 × (0.5 to 2.5 mm²) solid or stranded wire. The screwdriver shaft diameter is 3 mm; tip size is 3.0 × 0.5 mm. Depth is 84 mm, width 45 mm, height 102 mm — fits standard S0 footprint panels.","metaTitle":"Siemens 3RU2126-4CC0 SIRIUS Thermal Overload Relay, CLASS 10","metaDescription":"Siemens 3RU2126-4CC0 SIRIUS thermal overload relay, CLASS 10, 690 V rated, 22 A at 480/600 V, 11 kW at 400/500 V. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Overload Relays"],"specifications":{"Note":"for message \"Tripped\"","Depth":"84 mm","Width":"45 mm","Height":"102 mm","at 24 V":"2 A","at 60 V":"0.3 A","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","at 690 V":"0.75 A","Trip Class":"CLASS 10","Rated Value":"690 V","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-40 ... +70 °C","During Transport":"-55 ... +80 °C","Fastening Method":"Contactor mounting","Mounting Position":"any","Solid Or Stranded":"2x (0.5 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"thermal overload relay","at 400 V rated value":"11 kW","at 480 V rated value":"22 A","at 500 V rated value":"11 kW","at 600 V rated value":"22 A","at 690 V rated value":"18.5 kW","Size Of Overload Relay":"S0","For Main Current Circuit":"spring-loaded terminals","Temperature Compensation":"-40 ... +60 °C","MTTF with high demand rate":"2 280 a","Design Of Screwdriver Shaft":"Diameter 3 mm","Size Of The Screwdriver Tip":"3,0 x 0,5 mm","at AC-3e rated value maximum":"690 V","Substance Prohibitance (Date)":"10/01/2009","Design Of The Auxiliary Switch":"integrated","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"22 A","at AWG cables for main contacts":"1x (18 ... 8)","For Auxiliary And Control Circuit":"spring-loaded terminals","Between Main And Auxiliary Circuit":"440 V","Relative Humidity During Operation":"10 ... 95 %","Display Version For Switching Status":"Slide switch","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 14)","Between Auxiliary And Auxiliary Circuit":"440 V","reference code according to IEC 81346-2":"F","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number Of Poles For Main Current Circuit":"3","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","shock resistance according to IEC 60068-2-27":"8g / 11 ms","operational current at AC-3e at 400 V rated value":"22 A","Size Of Contactor Can Be Combined Company-Specific":"S0","contact rating of auxiliary contacts according to UL":"B600 / R300","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Arrangement Of Electrical Connectors For Main Current Circuit":"Top and bottom","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse 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":"$30.48","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/de9812b4c91a91582801636a4b34f3fe.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=66980&mlfb=3RU2126-4CC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RU2126-4CC0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RU2126-4CC0 and how do I get a price?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time."},{"question":"What is the trip class of 3RU2126-4CC0?","answer":"It is CLASS 10, meaning it will trip within 10 seconds at 7.2× the current setting — suited for standard motor starting."},{"question":"What is the rated voltage and power of 3RU2126-4CC0?","answer":"Rated voltage is 690 V. At 400 V it handles 11 kW; at 480 V and 600 V it carries 22 A; at 690 V it handles 18.5 kW."},{"question":"Does 3RU2126-4CC0 have an integrated auxiliary switch?","answer":"Yes, the auxiliary switch is integrated — no separate add-on block is required for a remote trip indication."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU2126-4CC0","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/3RU2126-4CC0 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}}