{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1034-1XB40-0LA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1034-1XB40-0LA2","canonicalUrl":"https://aoctrl.com/siemens/3RT1034-1XB40-0LA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1XB40-0LA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S2 power contactor, order code 3RT1034-1XB40-0LA2, 24 VDC coil, screw terminals, rated 15 kW at 400 V AC-3, 130 mm depth.","salesMarkdown":"The Siemens 3RT1034-1XB40-0LA2 is a SIRUS S2 power contactor — a panel-mounted, 24 VDC-coiled switching device for motor loads up to 15 kW in AC-3 duty at 400 V, or 18.5 kW at 500 V. The AC-3 motor rating is the one that governs real use: 15 kW at 400 V and 18.5 kW at 500 V. That means it switches a standard 4-pole induction motor up to that mechanical output under full load — not just the resistive AC-1 current. For resistive loads (AC-1), the contactor is rated for 1 200 operations per hour; for AC-3 motor switching, 1 000 ops/hour; for the heavy inrush of AC-4 reversing or inching, 250 ops/hour. Coil is 24 VDC, rated 10 A pickup at 24 V. The dropout threshold is below 18 V (0.7 × 24 V), and the DC operating time is 20 to 30 ms. Arcing time runs 10 to 15 ms — relevant for coordination with upstream fuses or breakers. Auxiliary contacts handle 6 A at 230 V, 3 A at 400 V, and 0.3 A at 220 V DC — enough for pilot duty on 24 VDC PLC inputs or small relay coils. The contactor carries a mechanical service life of 10 million operations typical. Clearance distances: 10 mm upwards, downwards, forwards, and to the side. Side-by-side mounting is permitted, which saves rail space in a dense panel.","metaTitle":"Siemens 3RT1034-1XB40-0LA2 SIRIUS S2 Power Contactor, 24 VDC","metaDescription":"Siemens SIRIUS S2 power contactor, 24 VDC coil, 15 kW at 400 V AC-3. Screw terminals, DIN rail mount. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"130 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 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":"24 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":"screw-type 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 (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","Finely Stranded Without Core End Processing":"2x (0.75 ... 16 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=213651&mlfb=3RT1034-1XB40-0LA2","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1XB40-0LA2/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RT1034-1XB40-0LA2?","answer":"The 3RT1044-1FB46 is a physically larger frame (S3 vs S2) with higher AC-3 ratings; it will not drop into a panel wired for the S2 without re-drilling the mounting holes and checking bus bar spacing. The 3RT5034-1BW40 is a different series (SIRIUS 3RT5) with a different terminal layout. Neither is a direct swap without panel rework."},{"question":"Where can I buy 3RT1034-1XB40-0LA2?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the depth of 3RT1034-1XB40-0LA2?","answer":"The depth is 130 mm. Overall dimensions: 142 mm height, 55 mm width."},{"question":"What wire sizes does the 3RT1034-1XB40-0LA2 accept?","answer":"Main circuit screw terminals accept stranded conductors 2x (0.75 to 25 mm²). Solid wire: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1034-1XB40-0LA2","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/3RT1034-1XB40-0LA2 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}}