{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1034-3KB44-0LA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1034-3KB44-0LA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1034-3KB44-0LA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1034-3KB44-0LA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, Size S2, 24 VDC coil, 18.5 kW at 500 V AC-3, screw terminals, DIN rail mount.","salesMarkdown":"The 18.5 kW rating at 500 V AC-3 tells you it handles standard squirrel-cage motor starting and running up to that power — the AC-3 duty class covers starting and disconnecting motors under load. For more demanding applications like reversing or plugging, the AC-4 rating of 29 A at 400 V gives the thermal capacity for those higher-stress cycles. The 24 VDC coil draws 10 A at rated voltage, with a dropout delay of 20 to 30 ms and arcing time of 10 to 15 ms. That dropout window matters for control logic timing — if your PLC or safety relay needs a fast drop, factor in that 20 ms minimum before the main contacts open. Side-by-side mounting is supported — no derating gap required for adjacent contactors in the same row. Main power terminals are screw-type accepting 2x (0.75 to 25 mm²) stranded or 2x (0.25 to 2.5 mm²) solid. The minimum 16 mm² at 40 °C tells you the smallest wire gauge for full rated current at elevated ambient. Coil terminals use the same screw clamp range. IP00 on the front and terminals means it's an open device — install inside a panel with at least IP54 enclosure for anything beyond a clean dry location. ## Switching frequency and coil data Maximum switching rates: 1200 cycles/hour at AC-1 (resistive), 750 at AC-2 (slip-ring motors), 1000 at AC-3 (squirrel-cage motors), and 250 at AC-4 (reversing/inching). The AC-4 limit is the binding one for high-duty applications — if your cycle rate exceeds 250 per hour in a reversing crane or conveyor, step up to a larger frame. Coil pickup at 0.7 of rated voltage, dropout at 1.25 of rated. That 0.7 factor means the coil pulls in reliably even if the 24 VDC supply droops. RoHS compliance date is 05/01/2012, covering the EU RoHS directive.","metaTitle":"Siemens 3RT1034-3KB44-0LA0 SIRIUS Power Contactor, 18.5 kW a","metaDescription":"Siemens SIRIUS power contactor, Size S2, 24 VDC coil, 18.5 kW at 500 V AC-3. Screw terminals, DIN rail mount. 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":"167 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"80 mm","at DC":"20 ... 30 ms","Height":"110 mm","Stranded":"2x (0.75 ... 25 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":"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","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":"18.5 kW","at 690 V rated value":"10 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","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","at 40 °C minimum permissible":"16 mm²","at 60 °C minimum permissible":"10 mm²","Design Of The Surge Suppressor":"with varistor","Insulation Voltage Rated Value":"690 V","at 230 V at 60 °C rated value":"18 kW","at 690 V at 60 °C rated value":"54 kW","at AWG cables for main contacts":"2x (18 ... 2)","For Auxiliary And Control Circuit":"spring-loaded terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 63 A","closing power of magnet coil at DC":"46 W","holding power of magnet coil at DC":"14 W","Surge Voltage Resistance Rated Value":"6 kV","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","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Thermal Short-Time Current Limited To 10 S":"320 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=97549&mlfb=3RT1034-3KB44-0LA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1034-3KB44-0LA0/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RT1034-3KB44-0LA0?","answer":"The depth is 167 mm, with a width of 80 mm and height of 110 mm."},{"question":"What compliance documentation is available for 3RT1034-3KB44-0LA0?","answer":"RoHS compliance date is 05/01/2012. The part is a Siemens SIRIUS product; standard manufacturer declarations for CE, UL, and IEC are available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1034-3KB44-0LA0","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/3RT1034-3KB44-0LA0 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}}