{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1046-1BF44","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1046-1BF44","canonicalUrl":"https://aoctrl.com/siemens/3RT1046-1BF44","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1046-1BF44","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, order code 3RT1046-1BF44, size S3, screw-type terminals, 55 kW at 500 V AC-3, snap-on mounting for 35 mm and 75 mm rail.","salesMarkdown":"It carries a 55 kW rating at 500 V in AC-3 duty, which is the standard category for squirrel-cage motors during starting and disconnection under load — that 55 kW figure is the key selection parameter for sizing the contactor to the motor nameplate. The contactor snaps onto 35 mm or 75 mm standard mounting rail, so panel integration is straightforward: no drilling, just clip and wire. AC-3 switching at 400 V delivers 45 kW, and at 690 V it delivers 25.4 kW — the voltage derating is normal for contactors, and the 690 V figure matters if you are running a 690 V motor in a European or marine installation. The main current circuit uses screw-type terminals, accepting solid wire from 2x (0.5... 1.5 mm²) up to max 2x (0.75... 4 mm²) for the control circuit, and stranded wire 2x (10... 50 mm²) for the power circuit. That means the power lugs handle up to 50 mm² stranded — common for 55 kW motor feeds. The IP20 rating on the front with cover or box terminal means the front is touch-safe; the terminal itself is IP00, so the wiring compartment needs enclosure protection. Side-by-side mounting is allowed, which saves panel width when grouping multiple contactors. The contactor measures 146 mm high, 70 mm wide, and 201 mm deep. The 70 mm width is the same as the S3 frame standard, so it shares a common footprint with other SIRIUS S3 devices for uniform panel layout. The depth of 201 mm includes the overhang of the screw terminals — allow clearance for the outgoing cable bend radius, especially with 50 mm² stranded conductors.","metaTitle":"Siemens 3RT1046-1BF44 SIRIUS Power Contactor, S3, 55 kW at 5","metaDescription":"Siemens 3RT1046-1BF44 SIRIUS power contactor, size S3, rated 55 kW at 500 V AC-3. Screw terminals, snap-on 35/75 mm rail. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"201 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":"110 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":"2","number of NO contacts for auxiliary contacts instantaneous contact":"2","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=282373&mlfb=3RT1046-1BF44","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1046-1BF44/alternatives.json"},"ai":{"faq":[{"question":"What is 3RT1046-1BF44 used for?","answer":"This is a SIRIUS power contactor used to switch three-phase motor loads in industrial control panels, typically for pumps, conveyors, fans, and compressors up to 55 kW at 500 V AC-3."},{"question":"Where can I buy 3RT1046-1BF44 and how is it quoted?","answer":"This part is sourced to order through independent distribution. Availability and current pricing are confirmed at quote time against an RFQ — no stock or price is published here. Submit an RFQ for a firm quote with lead time."},{"question":"What are the key dimensions of 3RT1046-1BF44?","answer":"Height is 146 mm, width is 70 mm, and depth is 201 mm. It snaps onto 35 mm or 75 mm standard mounting rail."},{"question":"What compliance documentation does Siemens provide for 3RT1046-1BF44?","answer":"The part carries a substance prohibitance date of 05/01/2012, indicating RoHS compliance per the EU directive. Standard Siemens documentation includes CE declaration, UL/CSA file numbers, and REACH SVHC data on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1046-1BF44","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/3RT1046-1BF44 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}}