{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1046-1BB40-0UA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1046-1BB40-0UA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1046-1BB40-0UA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1046-1BB40-0UA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, Size S3, 3RT1046-1BB40-0UA0, 55 kW at 500 V AC-3, screw-type terminals, IP20 front, snap-on 35/75 mm DIN rail.","salesMarkdown":"Its AC-3 rating of 55 kW at 500 V means it handles standard squirrel-cage motors up to that power — the rating that typically governs the selection for pump, fan, and conveyor duty. The 80 A AC-4 rating at 400 V covers the more demanding reversing or inching applications where the contactor makes and breaks stalled rotor current. Snaps onto standard 35 mm or 75 mm DIN rail — no tools needed for the rail mount, though the screw-type main circuit terminals (accepting up to 2x 50 mm² stranded) will need a screwdriver. The 70 mm width and 146 mm height fit a standard S3 footprint, so it drops into existing panel layouts sized for that frame. Side-by-side mounting is permitted, which saves rail space when grouping multiple contactors. ## Environmental and Protection Rated IP20 on the front with the cover or box terminal fitted — sufficient for enclosed panel use where operators don't contact live parts. The terminal itself is IP00 (no finger protection at the wiring point), so the panel door or enclosure provides the outer safeguard. Operating temperature range of -25 to +60 °C covers most indoor industrial environments; storage range extends to -55 to +80 °C.","metaTitle":"Siemens 3RT1046-1BB40-0UA0 SIRIUS Power Contactor, Size S3,","metaDescription":"Siemens SIRIUS 3RT1046-1BB40-0UA0 power contactor, Size S3, rated 55 kW at 500 V AC-3. Screw terminals, IP20 front, snap-on DIN rail. Active lifecycle. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"152 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"70 mm","at DC":"14 ... 20 ms","Height":"146 mm","Stranded":"2x (10 ... 50 mm²)","Arcing Time":"10 ... 15 ms","Rated Value":"24 V","On The Front":"IP20; IP20 on the front with cover / box terminal","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of The Terminal":"IP00","at AC-1 maximum":"900 1/h","at AC-2 maximum":"350 1/h","at AC-3 maximum":"850 1/h","at AC-4 maximum":"250 1/h","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm and 75 mm standard mounting rail","Full-Scale Value":"1.1","Size Of Contactor":"S3","Solid Or Stranded":"2x (2.5 ... 16 mm²)","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"power contactor","at 24 V rated value":"10 A","at 60 V rated value":"2 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.3 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 500 V rated value":"55 kW","at 690 V rated value":"25.4 kW","Side-By-Side Mounting":"Yes","at 1000 V rated value":"37 W","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"45 kW","at AC-4 at 400 V rated value":"80 A","Substance Prohibitance (Date)":"05/01/2012","at 40 °C minimum permissible":"50 mm²","at 60 °C minimum permissible":"35 mm²","Insulation Voltage Rated Value":"1 000 V","at 230 V at 60 °C rated value":"38 kW","at 690 V at 60 °C rated value":"114 kW","at 1000 V at 60 °C rated value":"98 W","at AWG cables for main contacts":"2x (10 ... 1/0)","For Auxiliary And Control Circuit":"screw-type terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 160 A","closing power of magnet coil at DC":"15 W","holding power of magnet coil at DC":"15 W","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"fuse gL/gG: 250 A","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","number of NC contacts for main contacts":"0","number of NO contacts for main contacts":"3","reference code according to IEC 81346-2":"Q","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","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Thermal Short-Time Current Limited To 10 S":"760 A","Finely Stranded Without Core End Processing":"2x (10 ... 35 mm²)","Type Of Voltage Of The Control Supply Voltage":"DC","Required Spacing For Grounded Parts At The Side":"6 mm","contact rating of auxiliary contacts according to UL":"A600 / Q600","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","number of NC contacts for auxiliary contacts instantaneous contact":"0","number of NO contacts for auxiliary contacts instantaneous contact":"0","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=26525&mlfb=3RT1046-1BB40-0UA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1046-1BB40-0UA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1046-1BB40-0UA0 and what is the lead time?","answer":"This part is sourced to order through independent distribution. Availability and current pricing are confirmed at quote time against an RFQ — no stock figures or lead-time numbers are published here, but a quote request will return real-time supply posture."},{"question":"What is the closest functional alternative to 3RT1046-1BB40-0UA0?","answer":"The 3RT1044-1FB46 is a smaller Size S2 contactor in the same SIRIUS family. It will not drop into a panel wired for the S3 frame without rewiring — the footprint, terminal spacing, and current ratings differ. The 3RT1046-1BB40-0UA0 is the correct fit for the S3 frame and 55 kW AC-3 rating."},{"question":"What compliance documentation does this brand provide?","answer":"RoHS compliance is documented with a substance prohibition date of 05/01/2012. The SIRIUS series typically carries UL, CSA, and CE certifications, though specific approval markings for this variant should be verified against the nameplate or manufacturer declaration."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1046-1BB40-0UA0","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/3RT1046-1BB40-0UA0 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}}