{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU1146-4MB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU1146-4MB0","canonicalUrl":"https://aoctrl.com/siemens/3RU1146-4MB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RU1146-4MB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, 3RU1146-4MB0, Size S3, Class 10, screw-type terminals, IP20 front, ATEX approved.","salesMarkdown":"The Siemens 3RU1146-4MB0 is a SIRIUS thermal overload relay, Size S3, with Class 10 trip characteristic. Mounts directly onto a contactor via the fastening method listed as contactor mounting — no DIN rail required, though the relay itself is sized for S3 contactor platforms. Spacing: 6 mm at the side, zero clearance upwards, forwards, backwards, and downwards — so it can be packed tight in a multi-row panel as long as side breathing gaps are respected. ## Wiring and terminal capacity Main circuit terminals accept solid conductors from 2x (0.5... 1.5 mm²) up to 2x (10... 50 mm²) and stranded up to 10... 70 mm². Auxiliary and control circuit terminals are screw-type. ## Protection and approvals Rated for ATEX environments (DMT 98 ATEX G 001). IP20 on the front. Surge voltage resistance rated at 8 kV.","metaTitle":"Siemens 3RU1146-4MB0 SIRIUS Thermal Overload Relay, Class 10","metaDescription":"Siemens 3RU1146-4MB0 SIRIUS thermal overload relay, Size S3, Class 10 trip, ATEX approved, 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":"3RU1146-4MB0","Height":"120 mm","Upwards":"0 mm","at 24 V":"1 A","Forwards":"0 mm","Per Pole":"7 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 80...100 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 >>3RU2146-4MB0<<","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: 200 A","Surge Voltage Resistance Rated Value":"8 kV","With Type Of Coordination 1 Required":"gG: 250 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":"21 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"80 ... 100 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$114.30","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/53c36a624ce461479de4f87f2c1b592b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=196515&mlfb=3RU1146-4MB0"},"ai":{"faq":[{"question":"What approvals does 3RU1146-4MB0 carry?","answer":"ATEX certification (DMT 98 ATEX G 001,) for explosive-gas environments, plus RoHS compliance (substance prohibition date 07/01/2006,)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU1146-4MB0","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/3RU1146-4MB0 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}}