{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1034-3XF40-0LA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1034-3XF40-0LA2","canonicalUrl":"https://aoctrl.com/siemens/3RT1034-3XF40-0LA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1034-3XF40-0LA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, S2 size, 3RT1034-3XF40-0LA2, 18.5 kW at 500 V AC-3, screw-type terminals, 55 mm width, snap-on DIN rail mounting.","salesMarkdown":"The Siemens SIRIUS 3RT1034-3XF40-0LA2 is a size S2 power contactor rated for motor switching at 18.5 kW at 500 V in AC-3 duty, and 15 kW at 400 V in AC-2 duty. Side-by-side mounting is permitted, with clearances of 10 mm upwards, downwards, forwards, and at the side. The 130 mm depth fits standard 200 mm deep enclosures without crowding the wiring duct. ## Ratings & Duty Rated for AC-3 motor switching at 18.5 kW at 500 V and 10 kW at 690 V. The AC-1 resistive load rating supports 1,200 operations per hour maximum; AC-3 duty allows 1,000 ops/h, while AC-4 (plugging/reversing) is limited to 250 ops/h. DC auxiliary contacts are rated 10 A at 24 V, 1 A at 110 V, and 0.3 A at 220 V. DC switching time is 20 to 30 ms. The contactor carries a typical mechanical life of 10 million operations.","metaTitle":"Siemens 3RT1034-3XF40-0LA2 SIRIUS Power Contactor, S2 Size,","metaDescription":"Siemens SIRIUS power contactor 3RT1034-3XF40-0LA2, S2 size, 18.5 kW at 500 V AC-3, 55 mm wide, screw terminals. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"130 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"55 mm","at DC":"20 ... 30 ms","Height":"142 mm","Upwards":"10 mm","Forwards":"10 mm","Stranded":"2x (0.75 ... 25 mm²)","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"10 mm","Rated Value":"110 V","Initial Value":"0.7","During Storage":"-55 ... +80 °C","at AC-1 maximum":"1 200 1/h","at AC-2 maximum":"750 1/h","at AC-3 maximum":"1 000 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 standard mounting rail according to DIN EN 50022","Full-Scale Value":"1.25","Size Of Contactor":"S2","Solid Or Stranded":"2x (0.75 ... 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":"18.5 kW","at 690 V rated value":"10 kW","Instantaneous Contact":"0","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at maximum AC-1 rated value":"16 mm²","at AC-2 at 400 V rated value":"15 kW","at AC-4 at 400 V rated value":"29 A","Substance Prohibitance (Date)":"05/01/2012","Design Of The Surge Suppressor":"with varistor","at AWG cables for main contacts":"2x (18 ... 2)","For Auxiliary And Control Circuit":"spring-loaded terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"fuse gL/gG: 63 A","closing power of magnet coil at DC":"15 W","holding power of magnet coil at DC":"11 W","With Type Of Coordination 1 Required":"fuse gL/gG: 125 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=536382&mlfb=3RT1034-3XF40-0LA2","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1034-3XF40-0LA2/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RT1034-3XF40-0LA2?","answer":"Submit an RFQ through this listing; we source it to order with availability and current pricing confirmed at quote time."},{"question":"What is 3RT1034-3XF40-0LA2's depth?","answer":"The listed depth is 130 mm."},{"question":"What wire sizes does the 3RT1034-3XF40-0LA2 accept on the main terminals?","answer":"The screw-type main terminals accept solid or stranded conductors: 2x (0.25 to 2.5 mm²) for solid, and 2x (0.75 to 25 mm²) for stranded."},{"question":"Will 3RT1034-3XF40-0LA2 drop into a panel specified around 3RT1044-1FB46?","answer":"The 3RT1044-1FB46 is a larger frame size (S3 vs S2) with higher current ratings; the 3RT1034-3XF40-0LA2 will not directly replace it without rewiring and checking the mounting footprint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1034-3XF40-0LA2","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/3RT1034-3XF40-0LA2 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}}