{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1044-1AH00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1044-1AH00","canonicalUrl":"https://aoctrl.com/siemens/3RT1044-1AH00","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1044-1AH00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S3, 30 kW at AC-2 400 V, 55 A at AC-4 400 V, screw-type terminals, 70 mm width, 146 mm height, 139 mm depth.","salesMarkdown":"It's rated for 30 kW at AC-2 duty on 400 V (the standard for slip-ring motors and high-inertia starts) and can handle 55 A at AC-4 duty on 400 V, which covers plugging and inching operations where the contactor breaks full motor current. ## Duty-cycle and switching life This contactor is rated for 1,000 operations per hour at AC-1 (resistive loads) and AC-3 (standard squirrel-cage motor starting), 400 ops/h at AC-2, and 300 ops/h at AC-4. For comparison, the 3RT5044-1BM40 is the same S3 frame but with a different coil voltage or auxiliary configuration — same mounting footprint, same main current path, so it's a drop-in swap if the coil matches your control voltage. ## Wiring and environmental fit Terminal wiring: the main circuit screw terminals accept solid wire 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²), and stranded wire 2x (10 to 50 mm²). Auxiliary/control terminals take 2x (2.5 to 16 mm²) solid or stranded. The coil draws 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, and 6 A at 230 V — watch your control transformer sizing.","metaTitle":"Siemens 3RT1044-1AH00 SIRIUS Power Contactor, 30 kW AC-2, 55","metaDescription":"Siemens 3RT1044-1AH00 SIRIUS S3 power contactor. 30 kW at AC-2 400 V, 55 A at AC-4 400 V. Screw terminals, DIN-rail mount. Current lifecycle. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"139 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"70 mm","at AC":"10 ... 19 ms","Height":"146 mm","Stranded":"2x (10 ... 50 mm²)","at 50 Hz":"0.8 ... 1.1","Arcing Time":"10 ... 15 ms","On The Front":"IP20; IP20 on the front with cover / box terminal","1 Rated Value":"50 Hz","During Storage":"-55 ... +80 °C","Of The Terminal":"IP00","at AC-1 maximum":"1 000 1/h","at AC-2 maximum":"400 1/h","at AC-3 maximum":"1 000 1/h","at AC-4 maximum":"300 1/h","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm and 75 mm standard mounting rail","Size Of Contactor":"S3","Solid Or Stranded":"2x (2.5 ... 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 50 Hz rated value":"48 V","at 500 V rated value":"37 kW","at 690 V rated value":"18.6 kW","Side-By-Side Mounting":"Yes","at 1000 V rated value":"30 W","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"30 kW","at AC-4 at 400 V rated value":"55 A","Substance Prohibitance (Date)":"05/01/2012","at 40 °C minimum permissible":"35 mm²","at 60 °C minimum permissible":"35 mm²","Insulation Voltage Rated Value":"1 000 V","at 230 V at 60 °C rated value":"34 kW","at 690 V at 60 °C rated value":"102 kW","at 1000 V at 60 °C rated value":"66 W","at AWG cables for main contacts":"2x (10 ... 1/0)","For Auxiliary And Control Circuit":"screw-type terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 125 A","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"fuse gL/gG: 250 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","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Thermal Short-Time Current Limited To 10 S":"600 A","Finely Stranded Without Core End Processing":"2x (10 ... 35 mm²)","apparent holding power of magnet coil at AC":"21 VA","apparent pick-up power of magnet coil at AC":"218 VA","Type Of Voltage Of The Control Supply Voltage":"AC","Required Spacing For Grounded Parts At The Side":"6 mm","contact rating of auxiliary contacts according to UL":"A600 / Q600","Inductive Power Factor With Closing Power Of The Coil":"0.61","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.26","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":"0","number of NO contacts for auxiliary contacts instantaneous contact":"0","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=109145&mlfb=3RT1044-1AH00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1044-1AH00/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RT1044-1AH00?","answer":"The depth is 139 mm. Width is 70 mm, height is 146 mm. It fits the S3 frame footprint common across Siemens SIRIUS contactors."},{"question":"Will 3RT1044-1AH00 drop into a panel wired for 3RT1044-1FB46?","answer":"Both are SIRIUS S3 frame contactors with the same physical dimensions and screw-terminal main circuit, so they share the same mounting footprint and bus-bar spacing. The difference is in the coil voltage and auxiliary contact configuration — check that your control voltage matches the coil rating before swapping."},{"question":"What compliance documentation does Siemens provide for 3RT1044-1AH00?","answer":"The part carries a substance prohibitance date of 05/01/2012, indicating RoHS compliance from that date. Standard Siemens SIRIUS documentation includes CE declaration, UL/CSA listings, and REACH compliance data available on request."},{"question":"Where can I buy 3RT1044-1AH00?","answer":"This part is sourced to order through our independent distribution network. Submit an RFQ and we'll confirm availability and current pricing — no minimum order quantity for standard requests."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1044-1AH00","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/3RT1044-1AH00 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}}