{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU6126-1FB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU6126-1FB0","canonicalUrl":"https://aoctrl.com/siemens/3RU6126-1FB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RU6126-1FB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, thermal overload relay, 3RU6126-1FB0, adjustable 3.5–5 A, Class 10, size S0, screw-type terminals, contactor mounting.","salesMarkdown":"## Motor protection relay, size S0, 3.5–5 A It mounts directly onto a size S0 contactor, forming a compact motor starter package. ## Integration with S0 contactors Fastening method is contactor mounting — the relay snaps onto the S0 contactor without additional brackets. The screw-type terminals on both main and auxiliary circuits accept 2x (0.5–1.5 mm²) solid or stranded, or 2x (0.75–2.5 mm²) with ferrules. Tightening torque for main contacts is 2 to 2.5 N·m. The 85 mm depth and 45 mm width leave room for side-by-side spacing; Siemens requires 6 mm clearance to grounded parts at the side. The relay withstands 8g shock at 11 ms per IEC 60068-2-27. The substance prohibitance date of 05/01/2012 confirms RoHS compliance since that date.","metaTitle":"Siemens 3RU6126-1FB0 SIRIUS Overload Relay, 3.5–5 A, Class 1","metaDescription":"Siemens 3RU6126-1FB0 SIRIUS thermal overload relay, 3.5–5 A adjustable, Class 10, size S0 for contactor mounting. Screw terminals. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"85 mm","Width":"45 mm","title":"3RU6126-1FB0","Height":"85 mm","at 24 V":"2 A","Per Pole":"2.2 W","at 110 V":"0.22 A","at 230 V":"2 A","Trip Class":"CLASS 10","description":"Overload relay 3.5...5.0 A size S0, class 10, for motor protection for mounting onto contactors main circuit: screw terminal AUX. circuit: screw terminal manual automatic reset","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 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Thermal overload relay","For Main Current Circuit":"screw-type terminals","power loss [W] total typical":"6.1 W","Operating Voltage Rated Value":"690 V","Substance Prohibitance (Date)":"05/01/2012","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"5 A","at AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 8)","For Auxiliary And Control Circuit":"screw-type terminals","Relative Humidity During Operation":"0 ... 90 %","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","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","shock resistance according to IEC 60068-2-27":"8g / 11 ms","Required Spacing For Grounded Parts At The Side":"6 mm","Size Of Contactor Can Be Combined Company-Specific":"S0","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Arrangement Of Electrical Connectors For Main Current Circuit":"Top and bottom","Tightening Torque For Main Contacts With Screw-Type Terminals":"2 ... 2.5 N·m","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":"3.5 ... 5 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0b2264fcf87fa707ded651cc96cdb893.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=621535&mlfb=3RU6126-1FB0"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RU6126-1FB0?","answer":"The 3RU6126-1FB0 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 adjustable current range on 3RU6126-1FB0?","answer":"The adjustable current response value is 3.5 to 5 A."},{"question":"What contactor size does 3RU6126-1FB0 mount onto?","answer":"It mounts onto a size S0 contactor using the contactor mounting fastening method."},{"question":"What compliance documentation does 3RU6126-1FB0 have?","answer":"The substance prohibitance date of 05/01/2012 confirms RoHS compliance since that date. Rated insulation voltage is 690 V at pollution degree 3, with a surge voltage resistance of 6 kV."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU6126-1FB0","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/3RU6126-1FB0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}