{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU1146-4EB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU1146-4EB0","canonicalUrl":"https://aoctrl.com/siemens/3RU1146-4EB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RU1146-4EB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, S3 size, CLASS 10, screw terminals, ATEX, IP20 front, 140 mm depth.","salesMarkdown":"It mounts directly onto a contactor (contactor mounting), so it integrates into a motor starter assembly on a DIN-rail panel without additional brackets or wiring trays. It carries ATEX certification (DMT 98 ATEX G 001), so it's approved for use in explosive-gas atmospheres (Zone 1 or 2) when paired with the correct upstream protection and housed in a certified enclosure — a critical detail for chemical, oil-and-gas, or grain-handling lines. The auxiliary contact ratings cover both 24 V DC (1 A) and 120 V AC (3 A) control circuits, so it can signal a PLC input directly at 24 V or drive a 120 V alarm circuit without an interposing relay — saves a part on the BOM. With a depth of 140 mm, width of 70 mm, and height of 120 mm, it's a standard S3 footprint; verify the enclosure depth clearance before panel layout, especially if the contactor behind it adds length. ## Wiring and conductor sizing Main circuit terminals accept solid conductors from 2x (0.5 to 1.5 mm²) up to 2x (0.75 to 2.5 mm²) for auxiliary side, and stranded conductors up to 10 to 70 mm² on power side. Auxiliary contacts use screw-type terminals, same as the main circuit — consistent tooling for the panel builder, no need to switch between spring-cage and screw drivers on the same starter. No official successor has been announced; the 3RU1146-4EB0 remains the current order code for this S3 thermal overload relay. Shock-resistant to 8g for 10 ms, so it holds up to the vibration on a compressor skid or a conveyor drive end.","metaTitle":"Siemens 3RU1146-4EB0 SIRIUS thermal overload relay, CLASS 10","metaDescription":"Siemens 3RU1146-4EB0 SIRIUS thermal overload relay, CLASS 10 trip, ATEX certified, IP20 front, 140 mm depth. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"140 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Width":"70 mm","title":"3RU1146-4EB0","Height":"120 mm","Upwards":"0 mm","at 24 V":"1 A","Forwards":"0 mm","Per Pole":"4.5 W","Stranded":"2x (10 ... 50 mm²), 10 ... 70 mm²","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","Backwards":"0 mm","Downwards":"0 mm","Trip Class":"CLASS 10","At The Side":"6 mm","description":"Overload relay 22...32 A For motor protection Size S3, Class 10 Contactor mounting Main circuit: Screw terminal Auxiliary circuit: Screw terminal Manual-Automatic-Reset!!! Phased-out product!!! Successor is SIRIUS 3RU2 Preferred successor type is >>3RU2136-4EB0<<","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-20 ... +70 °C","During Transport":"-55 ... +80 °C","Fastening Method":"Contactor mounting","Shock Resistance":"8g / 10 ms","Mounting Position":"with vertical mounting surface +/-135° rotatable, with vertical mounting surface +/- 45° tiltable to the front and back","Product Brand Name":"SIRIUS","Type Of Protection":"DMT 98 ATEX G 001","Product Designation":"thermal overload relay","Size Of Overload Relay":"S3","For Main Current Circuit":"screw-type terminals","Substance Prohibitance (Date)":"07/01/2006","protection class IP on the front":"IP20","For Auxiliary And Control Circuit":"screw-type terminals","Relative Humidity During Operation":"100 %","With Type Of Assignment 2 Required":"gG: 80 A","Surge Voltage Resistance Rated Value":"8 kV","With Type Of Coordination 1 Required":"gG: 160 A","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","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","Touch Protection Against Electrical Shock":"finger-safe","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","Size Of Contactor Can Be Combined Company-Specific":"S3","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 6 A, quick: 10 A","insulation voltage with degree of pollution 3 at AC rated value":"1 000 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":"13.5 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"22 ... 32 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$63.50","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a1cc6aeb65368ffa6f10c2f4149decf6.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=343954&mlfb=3RU1146-4EB0"},"ai":{"faq":[{"question":"Will the 3RU1146-4EB0 drop into a panel specified around the 3RT5036-1AB00 contactor?","answer":"The 3RU1146-4EB0 uses contactor mounting and is part of the same SIRIUS S3 platform as the 3RT5036-1AB00, so it physically mates to that contactor without rewiring — verify the screw-terminal torque specs match your panel's existing wiring."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU1146-4EB0","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/3RU1146-4EB0 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}}