{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1034-3KF44-0LA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1034-3KF44-0LA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1034-3KF44-0LA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1034-3KF44-0LA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1034-3KF44-0LA0, S2 frame power contactor, 18.5 kW at 500 V AC-3, 110 V DC coil, screw-type terminals, DIN rail mount.","salesMarkdown":"## Integrator's note on the 3RT1034-3KF44-0LA0 The Siemens SIRIUS 3RT1034-3KF44-0LA0 is a S2 frame power contactor rated for motor switching at 18.5 kW on 500 V AC-3 duty, or 10 kW at 690 V AC-3. Coil is 110 V DC, which means you need a separate DC supply or a rectifier module in the panel; verify your control transformer and rectifier sizing before wiring. RoHS compliance date is noted as May 1, 2012, so the design predates the more recent substance restrictions but meets the original RoHS directive. If your compliance team needs a Declaration of Conformity or REACH documentation, that's standard Siemens paperwork available through the supply chain. ## Termination and wiring details Main circuit terminals accept 2x (0.75...25 mm²) stranded or 2x (0.25...2.5 mm²) solid wire. At 40 °C, the minimum permissible cross-section is 16 mm² for the main conductors — that's the thermal limit for full rated current, not a mechanical minimum. Side-by-side mounting is allowed with no derating penalty, which saves panel width when stacking multiple contactors.","metaTitle":"Siemens SIRIUS 3RT1034-3KF44-0LA0 Power Contactor, S2 Frame,","metaDescription":"Siemens SIRIUS 3RT1034-3KF44-0LA0 power contactor, S2 frame, 18.5 kW at 500 V AC-3, 110 V DC coil. Screw terminals, DIN rail mount. Current production. 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":"110 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 DIN 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","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","operational current at AC-12 maximum":"10 A","for AWG cables for auxiliary contacts":"2x (24 ... 14)","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=536406&mlfb=3RT1034-3KF44-0LA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1034-3KF44-0LA0/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation is available for this part?","answer":"RoHS compliance is documented with a substance prohibition date of May 1, 2012. Standard Siemens documentation includes a Declaration of Conformity for the Low Voltage Directive and relevant IEC/EN standards. REACH and UL documentation are available through the supply chain upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1034-3KF44-0LA0","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/3RT1034-3KF44-0LA0 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}}