{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU6126-4PB1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU6126-4PB1","canonicalUrl":"https://aoctrl.com/siemens/3RU6126-4PB1","factsUrl":"https://aoctrl.com/api/mcp/products/3RU6126-4PB1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, 3RU6126-4PB1, 30-36 A adjustable, Class 10, size S0, screw terminals, stand-alone installation.","salesMarkdown":"It is designed for stand-alone installation and mounts in any position, sized for the S0 contactor frame. The 30-36 A adjustment window covers motor full-load currents in that band — set it to the nameplate FLA, and the Class 10 trip gives you 10 seconds at 600% of the set current before the bimetal opens the NC contact. That's fast enough to protect a standard induction motor during a locked-rotor event without nuisance-tripping on normal starts. Rated operational voltage is 690 V AC at 50-60 Hz, with an insulation voltage of 690 V at pollution degree 3 and a rated surge withstand of 6 kV. That puts it solidly in the 400/480 V panel range with headroom for 690 V systems. Main terminals accept 2x (0.5-1.5 mm²) solid/stranded or 2x (0.75-2.5 mm²), with a tightening torque of 2-2.5 N·m. Auxiliary terminals take 2x (0.5-1.5 mm²) or 2x (0.75-2.5 mm²) as well. AWG equivalents are 2x (16-12) and 2x (14-8) for mains, 2x (20-16) and 2x (18-14) for aux. Dimensions are 97 mm high, 45 mm wide, 95 mm deep. Side clearance to grounded parts must be at least 6 mm. It withstands 8g / 11 ms shock per IEC 60068-2-27 and is rated for installation up to 2000 m altitude. Auxiliary contact draw at 24 V is 2 A, at 110 V is 0.22 A, and at 230 V is 2 A. Per-pole power loss is 3.2 W. This relay is sized for the S0 contactor frame. It can be installed stand-alone. Width is 45 mm.","metaTitle":"Siemens 3RU6126-4PB1 SIRIUS Thermal Overload Relay, 30-36 A,","metaDescription":"Siemens SIRIUS 3RU6126-4PB1 thermal overload relay, 30-36 A adjustable, Class 10 trip, size S0 for 3RT contactors. Screw terminals, stand-alone mount. Current production. RFQ for p","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"95 mm","Width":"45 mm","title":"3RU6126-4PB1","Height":"97 mm","at 24 V":"2 A","Per Pole":"3.2 W","at 110 V":"0.22 A","at 230 V":"2 A","Trip Class":"CLASS 10","description":"Overload relay 30...36 A size S0, class 10, for motor protection stand-alone installation 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":"stand-alone installation","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":"7.5 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":"36 A","for 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","for 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":"9.6 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"30 ... 36 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/9c023c4687913a3dfe9948096811da16.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=621554&mlfb=3RU6126-4PB1"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU6126-4PB1","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/3RU6126-4PB1 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}}