{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU7126-1JB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU7126-1JB0","canonicalUrl":"https://aoctrl.com/siemens/3RU7126-1JB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RU7126-1JB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, size S0, CLASS 10, rated operational current 10 A, screw terminals, 3RU7126-1JB0.","salesMarkdown":"The Siemens 3RU7126-1JB0 is a SIRIUS thermal overload relay in size S0, CLASS 10, rated at 10 A operational current. It mounts directly onto a S0 contactor (fastening method: contactor mounting), forming a compact motor starter package for a DIN-rail panel. Mounts directly onto a S0 contactor (contactor mounting). The mounting position allows vertical surface installation with ±135° rotation and ±45° tilt forward/backward. Required spacing to grounded parts at the side is 6 mm. ## Ratings & Environment Rated operational current 10 A at AC, 690 V operating voltage, 50/60 Hz. Three poles for the main current circuit. Trip class CLASS 10. Ambient operating temperature -20 to +55 °C; transport/storage -25 to +70 °C. Humidity 0 to 90% during operation. Installation altitude up to 2000 m. Surge voltage resistance 6 kV. Power loss 6.6 W typical at rated current. Screw terminals for main and auxiliary circuits.","metaTitle":"Siemens 3RU7126-1JB0 SIRIUS Thermal Overload Relay, CLASS 10","metaDescription":"Siemens 3RU7126-1JB0 SIRIUS thermal overload relay, size S0, CLASS 10, rated current 10 A. Current production. Sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"96 mm","Width":"45 mm","Height":"97 mm","at 24 V":"3 A","Per Pole":"2.2 W","at 230 V":"2 A","Trip Class":"CLASS 10","On The Front":"IP20","Of The Terminal":"IP20","lifecycle_stage":"current","During Operation":"-20 ... +55 °C","During Transport":"-25 ... +70 °C","Fastening Method":"Contactor mounting","Mounting Position":"with vertical mounting surface +/-135° rotatable, with vertical mounting surface +/- 45° tiltable to the front and back","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Thermal overload relay","Size Of Overload Relay":"S0","For Main Current Circuit":"screw-type terminals","power loss [W] total typical":"6.6 W","Operating Voltage Rated Value":"690 V","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"10 A","For Auxiliary And Control Circuit":"screw-type terminals","Relative Humidity During Operation":"0 ... 90 %","Surge Voltage Resistance Rated Value":"6 kV","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","Type Of Voltage For Main Current Circuit":"AC/DC","For Main Contacts With Screw-Type Terminals":"2 ... 2.5 N·m","shock resistance according to IEC 60068-2-27":"8g / 11 ms","Required Spacing For Grounded Parts At The Side":"6 mm","For Auxiliary Contacts With Screw-Type Terminals":"0.8 ... 1.2 N·m","Size Of Contactor Can Be Combined Company-Specific":"S0","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","operational current of auxiliary contacts at DC-13 at 24 V":"1 A","Arrangement Of Electrical Connectors For Main Current Circuit":"Top and bottom","insulation voltage with degree of pollution 3 at AC rated value":"690 V","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":"7 ... 10 A","Design Of The Fuse Link For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 6 A, quick: 10 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a7ef429bfe2d1136ff998f9af093818e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1534243&mlfb=3RU7126-1JB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RU7126-1JB0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RU7126-1JB0 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at the time of quote."},{"question":"When sourcing 3RU7126-1JB0, what's the closest functional second-source — 3RU2116-1FC1?","answer":"The 3RU2116-1FC1 is a SIRIUS thermal overload relay in size S00, not S0. It will not directly drop into a panel designed for the S0-footprint 3RU7126-1JB0 without mechanical adaptation. The S00 frame is physically smaller and mounts to S00 contactors, not S0."},{"question":"What is 3RU7126-1JB0's listed depth (96 mm) on this component line?","answer":"The listed depth is 96 mm."},{"question":"What is 3RU7126-1JB0's listed width (45 mm) on this component line?","answer":"The listed width is 45 mm."},{"question":"Will 3RU7126-1JB0 drop into a panel that was specified around 3RU2116-1FC1 without rewiring?","answer":"No. The 3RU2116-1FC1 is a size S00 relay; the 3RU7126-1JB0 is size S0. The S0 frame has different mounting holes and terminal spacing. Mechanical adaptation is required."},{"question":"What compliance documentation does this brand provide for 3RU7126-1JB0 (RoHS, REACH, UL, IEC)?","answer":"The evidence does not list specific compliance documentation for this order code. Standard Siemens SIRIUS documentation applies; confirm with your Siemens contact for RoHS/REACH/UL declarations specific to this variant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU7126-1JB0","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/3RU7126-1JB0 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}}