{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1034-1XB44-0LA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1034-1XB44-0LA2","canonicalUrl":"https://aoctrl.com/siemens/3RT1034-1XB44-0LA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1XB44-0LA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS size S2 power contactor, 24 VDC coil, 18.5 kW at 500 V AC-3, screw terminals, 55 x 142 x 179 mm.","salesMarkdown":"The Siemens SIRIUS 3RT1034-1XB44-0LA2 is a size S2 power contactor with a 24 VDC coil, rated for motor switching at 18.5 kW at 500 V AC-3 and 10 kW at 690 V AC-3. It carries 2 instantaneous auxiliary contacts rated 10 A at 24 V and 6 A at 230 V, which is enough to signal a PLC input or drive a small indicator lamp without an interposing relay. The coil pickup-to-dropout ratio is 0.7, meaning it holds in at around 16.8 V and drops out below that. Dropout time on DC is 20 to 30 ms — fast enough for most E-stop circuits but not a safety contactor; that's a separate device. Mechanical life is rated 10 million operations. Switching frequency tops out at 1200 ops/h in AC-1, 1000 in AC-3, and 250 in AC-4 — that last one is the one to watch if you're jogging or inching a motor under load; it's the contact wear limit. Side-by-side mounting is allowed — no derating gap required between units, which saves rail space in a dense panel. Clearance to grounded metal is 10 mm in all directions (up, down, forward, side). Auxiliary terminals accept 2x (0.5 to 1.5 mm²) solid or 2x (0.75 to 2.5 mm²) stranded, with a maximum of 2x (0.75 to 4 mm²). That covers standard control wiring. If the panel ambient hits 70 °C, the contactor is still within its rated band — no forced derating needed.","metaTitle":"Siemens 3RT1034-1XB44-0LA2 SIRIUS Power Contactor, 24 VDC, 1","metaDescription":"Siemens SIRIUS 3RT1034-1XB44-0LA2 power contactor, size S2, 24 VDC coil, 18.5 kW at 500 V AC-3. Active lifecycle. Screw terminals. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"179 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":"2","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=109708&mlfb=3RT1034-1XB44-0LA2","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1XB44-0LA2/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RT1034-1XB44-0LA2?","answer":"The 3RT1044-1FB46 is a larger-frame sibling but shares the same 24 VDC coil voltage and screw-terminal wiring style. It will not drop into the same panel footprint without rewiring — the 3RT1044 frame is physically larger and draws more coil power. If the BOM is frozen to the S2 size, the 3RT1034-1XB44-0LA2 is the correct fit."},{"question":"Will 3RT1034-1XB44-0LA2 drop into a panel that was specified around 3RT1044-1FB46 without rewiring?","answer":"No — the 3RT1044-1FB46 is a larger frame (S3 vs S2) and has different mounting hole patterns and terminal positions. The 3RT1034-1XB44-0LA2 is physically smaller (55 mm wide vs the 3RT1044's wider footprint) and uses the same screw-terminal style, so the wiring method is similar, but the panel cutout and DIN-rail layout must be rechecked."},{"question":"Where can I buy 3RT1034-1XB44-0LA2?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1034-1XB44-0LA2","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/3RT1034-1XB44-0LA2 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}}