{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1046-3KB44-0LA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1046-3KB44-0LA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1046-3KB44-0LA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1046-3KB44-0LA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, S3 frame, 3RT1046-3KB44-0LA0, 80 A AC-4 at 400 V, 55 kW AC-3 at 500 V, screw-type terminals, 24 VDC coil, IP00 front and terminals.","salesMarkdown":"The Siemens SIRIUS 3RT1046-3KB44-0LA0 is an S3-frame power contactor built for motor switching and general load control in industrial panels. It's rated for 80 A in AC-4 duty at 400 V — that's the severe inching and plugging category where contact wear is highest — and delivers 55 kW at 500 V in AC-3 (start-run) service, or 25.4 kW at 690 V. The 24 VDC coil draws 10 A inrush at rated voltage, so size your control transformer and cable accordingly; the coil holds on a clean 24 VDC rail. This contactor snaps onto both 35 mm and 75 mm DIN rails — standard for European cabinets — and also accepts screw fixing for vibration-prone environments. Dimensions are 145 mm high by 95 mm wide by 191 mm deep. Side-by-side mounting is supported, so you can gang multiple units without a gap block, but watch the derating when packing tightly: the IP00 front and terminals mean it's intended for enclosed panels, not open air. ## Terminal details and wiring Screw-type terminals on the main circuit accept solid wire 2x (0.25...2.5 mm²) and stranded 2x (10...50 mm²), with a mid-range of 2x (2.5...16 mm²) for solid or stranded. That covers everything from control wiring to motor feeders up to 50 mm². The substance prohibition date of 05/01/2012 aligns with RoHS compliance; expect a declaration of conformity covering RoHS and REACH with the shipment.","metaTitle":"Siemens SIRIUS 3RT1046-3KB44-0LA0 power contactor, S3, 80 A","metaDescription":"Siemens SIRIUS 3RT1046-3KB44-0LA0 S3 power contactor. 80 A AC-4 at 400 V, 55 kW AC-3 at 500 V. Screw terminals, 24 VDC coil. Active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"191 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"95 mm","at DC":"14 ... 20 ms","Height":"145 mm","Stranded":"2x (10 ... 50 mm²)","Arcing Time":"10 ... 15 ms","Rated Value":"24 V","On The Front":"IP00","Initial Value":"0.7","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":"-40 ... +70 °C","Fastening Method":"screw and snap-on mounting onto 35 mm and 75 mm standard mounting rail","Full-Scale Value":"1.25","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","Design Of The Surge Suppressor":"with varistor","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":"spring-loaded terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 160 A","closing power of magnet coil at DC":"78 W","holding power of magnet coil at DC":"23 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 (24 ... 14)","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 (0.25 ... 1.5 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 (0.25 ... 2.5 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":"1","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=76955&mlfb=3RT1046-3KB44-0LA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1046-3KB44-0LA0/alternatives.json"},"ai":{"faq":[{"question":"What are the key motor-switching ratings for this contactor?","answer":"AC-3 duty: 55 kW at 500 V and 25.4 kW at 690 V. AC-4 duty: 80 A at 400 V. AC-2 at 400 V: 45 kW. These are the numbers that govern motor fit — the AC-4 rating tells you how it handles reversing or jogging duty without premature contact wear."},{"question":"What compliance documentation comes with this part?","answer":"RoHS compliance is confirmed by the substance prohibition date of 05/01/2012. Expect a declaration of conformity covering RoHS and REACH; UL and IEC certifications are typical for the SIRIUS line but are not explicitly listed in this spec record."},{"question":"What wire sizes does the screw terminal accept?","answer":"Solid wire: 2x (0.25...2.5 mm²). Stranded: 2x (10...50 mm²). Also accepts 2x (2.5...16 mm²) for solid or stranded. That covers control circuits up to heavy motor feeders."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1046-3KB44-0LA0","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/3RT1046-3KB44-0LA0 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}}