{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1046-1BB44-3MA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1046-1BB44-3MA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1046-1BB44-3MA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1046-1BB44-3MA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1046-1BB44-3MA0, S3 size power contactor, 45 kW AC-2 at 400 V, 80 A AC-4 at 400 V, screw-type terminals, 70 mm width.","salesMarkdown":"## SIRIUS S3 power contactor, 45 kW AC-2 motor switching The Siemens 3RT1046-1BB44-3MA0 is a SIRIUS S3-size power contactor rated for 45 kW at 400 V in AC-2 duty and 80 A at 400 V in AC-4 duty. The AC-2 rating governs slip-ring motor switching, while the AC-4 figure covers plugging and inching of squirrel-cage motors — the higher inrush and breaking duty of those operations. Main circuit termination uses screw-type terminals accepting stranded conductors up to 2x 50 mm². The AC-2 rating of 45 kW at 400 V is the figure to use when switching wound-rotor motors or other loads where the starting current is moderate and the break current is near rated. The AC-4 rating of 80 A at 400 V applies when the contactor must handle the high inrush of a squirrel-cage motor during plugging or jogging — a more severe duty that generates more arc energy. For less demanding AC-3 duty (starting and running squirrel-cage motors), the contactor is rated for 55 kW at 500 V and 25.4 kW at 690 V. Maximum switching frequency varies by duty class: 900 operations per hour for AC-1 resistive loads, 850 per hour for AC-3 motor starting, and 250 per hour for the severe AC-4 duty. Coil holding current at 24 V DC is 10 A, with a dropout time of 14 to 20 ms and arcing time of 10 to 15 ms. The 70 mm width and side-by-side mounting capability mean this contactor fits standard 35 mm or 75 mm DIN rails with no additional spacing required between units. The 201 mm depth is the dimension to check against enclosure depth and gland plate clearance.","metaTitle":"Siemens 3RT1046-1BB44-3MA0 SIRIUS S3 Power Contactor, 80 A A","metaDescription":"Siemens SIRIUS 3RT1046-1BB44-3MA0 S3 power contactor, 45 kW AC-2 at 400 V, 80 A AC-4 at 400 V. Screw terminals, 70 mm wide. Active production. RFQ for lead time.","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":"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":"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=526056&mlfb=3RT1046-1BB44-3MA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1046-1BB44-3MA0/alternatives.json"},"ai":{"faq":[{"question":"What are the key motor ratings for this contactor?","answer":"The contactor is rated for 45 kW at 400 V in AC-2 duty (slip-ring motors), 55 kW at 500 V in AC-3 duty (squirrel-cage motors), and 80 A at 400 V in AC-4 duty (plugging/inching)."},{"question":"What wire sizes does the main circuit accept?","answer":"The main circuit screw terminals accept stranded conductors from 2x 10 mm² up to 2x 50 mm². Auxiliary terminals accept solid wire from 0.5 mm² to 4 mm²."},{"question":"What are the mounting dimensions?","answer":"Width is 70 mm, height is 146 mm, and depth is 201 mm. It mounts via screw and snap-on onto 35 mm or 75 mm standard DIN rails and supports side-by-side mounting."},{"question":"What compliance documentation is available?","answer":"RoHS compliance is documented with a compliance date of May 1, 2012. The contactor is rated for pollution degree 3 per IEC standards."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1046-1BB44-3MA0","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/3RT1046-1BB44-3MA0 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}}