{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1046-3XB40-0LA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1046-3XB40-0LA2","canonicalUrl":"https://aoctrl.com/siemens/3RT1046-3XB40-0LA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1046-3XB40-0LA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S3, 55 kW at 500 V AC-3, 24 V DC coil, screw terminals, 70 x 176 x 152 mm.","salesMarkdown":"It is rated for 55 kW at 500 V and 25.4 kW at 690 V under AC-3 duty, meaning it handles the high inrush of induction motors up to those power levels without welding contacts. Side-by-side mounting is allowed with no derating gap, which saves rail space in dense layouts. Coil is 24 V DC rated, with a pickup dropout range typical for SIRIUS contactors — holds at 24 V nominal, drops out below 18 V. The DC coil draws 10 A at 24 V rated value, 2 A at 60 V, and 0.3 A at 220 V, so verify your control transformer sizing for the inrush.","metaTitle":"Siemens 3RT1046-3XB40-0LA2 SIRIUS Power Contactor, 55 kW at","metaDescription":"Siemens SIRIUS power contactor 3RT1046-3XB40-0LA2, size S3, rated 55 kW at 500 V AC-3, 24 V DC coil, screw terminals, active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"152 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"70 mm","at DC":"14 ... 20 ms","Height":"176 mm","Upwards":"10 mm","Forwards":"20 mm","Stranded":"2x (10 ... 50 mm²)","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"10 mm","Rated Value":"24 V","Initial Value":"0.7","During Storage":"-55 ... +80 °C","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","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","Instantaneous Contact":"0","Side-By-Side Mounting":"Yes","at 1000 V rated value":"37 W","For Main Current Circuit":"screw-type terminals","at maximum AC-1 rated value":"50 mm²","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","Design Of The Surge Suppressor":"with varistor","at AWG cables for main contacts":"2x (10 ... 1/0)","For Auxiliary And Control Circuit":"spring-loaded terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"fuse gL/gG: 160 A","closing power of magnet coil at DC":"19 W","holding power of magnet coil at DC":"12 W","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","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Type Of Voltage Of The Control Supply Voltage":"DC","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","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=42047&mlfb=3RT1046-3XB40-0LA2","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1046-3XB40-0LA2/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source — 3RT1044-1FB46?","answer":"The 3RT1044-1FB46 is a smaller frame size (S2) with lower current ratings. It will not drop into a panel wired for the S3 footprint without re-drilling the mounting holes and checking the lug size — the 3RT1046-3XB40-0LA2 uses screw terminals up to 50 mm², while the S2 typically handles smaller conductors."},{"question":"What is the listed depth on this component line?","answer":"Depth is 152 mm."},{"question":"What is the listed solid conductor size?","answer":"Solid conductors: 2x (0.25... 2.5 mm²)."},{"question":"Will 3RT1046-3XB40-0LA2 drop into a panel specified around 3RT1044-1FB46 without rewiring?","answer":"No — the 3RT1044-1FB46 is a size S2 contactor with different mounting dimensions and smaller terminal capacity. The 3RT1046-3XB40-0LA2 is size S3, 70 mm wide vs the S2's narrower footprint, so you would need to re-drill the DIN rail or panel holes and possibly upsize the lugs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1046-3XB40-0LA2","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/3RT1046-3XB40-0LA2 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}}