{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU2126-1DJ0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU2126-1DJ0","canonicalUrl":"https://aoctrl.com/siemens/3RU2126-1DJ0","factsUrl":"https://aoctrl.com/api/mcp/products/3RU2126-1DJ0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, 3RU2126-1DJ0, Class 10, S0 size, 690 V rated, contactor mounting, auxiliary switch integrated.","salesMarkdown":"Its Class 10 trip characteristic means it opens within 10 seconds at 7.2× the set current at operating temperature — the standard for standard-start induction motors, not for high-inertia loads that need a slower Class 20 or 30. Rated insulation voltage is 690 V, with power ratings of 1.1 kW at 400 V, 1.5 kW at 500 V, and 2.2 kW at 690 V. The integrated auxiliary switch provides signal feedback across the control voltage range: 2 A at 24 V, 3 A at 120 V, 2 A at 230 V, and 1 A at 400 V. Temperature compensation is active from -40 to +60 °C, and the relay operates across -40 to +70 °C ambient. The S0 footprint and contactor-mounting fastening mean it clips directly onto the matching Siemens contactor — no separate panel space needed, and the ring cable lug connection on the main circuit handles the motor leads. Mounts directly onto the matching Siemens contactor via the contactor-mounting fastening — no DIN rail or separate bracket required. The S0 size mates with the S0 contactor frame. The integrated auxiliary switch eliminates the need for a separate add-on block for the tripped signal. The substance prohibitance date of 10/01/2009 aligns with RoHS compliance. MTTF with high demand rate is 2,280 years.","metaTitle":"Siemens 3RU2126-1DJ0 SIRIUS Thermal Overload Relay, Class 10","metaDescription":"Siemens 3RU2126-1DJ0 SIRIUS thermal overload relay, Class 10, S0 size, 690 V rated, contactor-mounted. Active lifecycle, sourced to order. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Note":"for message \"Tripped\"","Depth":"85 mm","Width":"45 mm","Height":"85 mm","at 24 V":"2 A","at 60 V":"0.3 A","Per Pole":"1.9 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","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","For Main Contacts":"M4","Mounting Position":"any","Product Brand Name":"SIRIUS","Product Designation":"thermal overload relay","at 400 V rated value":"1.1 kW","at 480 V rated value":"3.2 A","at 500 V rated value":"1.5 kW","at 600 V rated value":"3.2 A","at 690 V rated value":"2.2 kW","Size Of Overload Relay":"S0","For Main Current Circuit":"Ring cable lug connection","Temperature Compensation":"-40 ... +60 °C","MTTF with high demand rate":"2 280 y","Design Of Screwdriver Shaft":"Diameter 5 ... 6 mm","Size Of The Screwdriver Tip":"Pozidriv PZ 2","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":"3.2 A","For Auxiliary And Control Circuit":"ring terminal lug connection","Between Main And Auxiliary Circuit":"440 V","Relative Humidity During Operation":"10 ... 95 %","Display Version For Switching Status":"Slide switch","For Main Contacts For Ring Cable Lug":"2.5 ... 2 N·m","Surge Voltage Resistance Rated Value":"6 kV","Of The Auxiliary And Control Contacts":"M3","Between Auxiliary And Auxiliary Circuit":"440 V","reference code according to IEC 81346-2":"F","Number Of Poles For Main Current Circuit":"3","For Auxiliary Contacts For Ring Cable Lug":"0.8 ... 1.2 N·m","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":"3.2 A","Size Of Contactor Can Be Combined Company-Specific":"S0","Outer Diameter Of The Usable Ring Cable Lug Maximum":"7.5 mm","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":"5.7 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"2.2 ... 3.2 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=271559&mlfb=3RU2126-1DJ0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RU2126-1DJ0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RU2126-1DJ0?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing confirmed at quote time."},{"question":"What is the closest functional alternative to 3RU2126-1DJ0?","answer":"The 3RU2116-1FC1 is the smaller S00 frame sibling in the same SIRIUS family. The 3RU2126-1DJ0 is the S0 frame version — physically larger, with higher current and power ratings. They are not drop-in interchangeable; the panel cutout and contactor frame differ."},{"question":"What does the 'for message Tripped' note mean on this relay?","answer":"The note indicates the integrated auxiliary switch changes state when the relay trips, providing a signal for a PLC or indicator lamp to annunciate the tripped condition."},{"question":"Will 3RU2126-1DJ0 drop into a panel specified for 3RU2116-1FC1?","answer":"No — the 3RU2126-1DJ0 is S0 frame size (45 mm wide) while the 3RU2116-1FC1 is S00 frame (smaller). The mounting hole pattern and contactor interface differ. Panel layout must accommodate the larger S0 footprint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU2126-1DJ0","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/3RU2126-1DJ0 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}}