{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1044-1AN10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1044-1AN10","canonicalUrl":"https://aoctrl.com/siemens/3RT1044-1AN10","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1044-1AN10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S3 power contactor, 3RT1044-1AN10, screw-type terminals, 55 A at AC-4 400 V, 70 mm wide, active production.","salesMarkdown":"This is a screw-and-snap-on mount onto 35 mm or 75 mm standard DIN rail — the same footprint as any SIRIUS S3 frame. At 70 mm wide and 146 mm tall, it'll drop into existing panel layouts without re-drilling. The front is IP20 with the cover or box terminal fitted, which is the usual protection for inside a cabinet. The terminal area itself is IP00, so keep that in mind during installation — no live parts exposed outside the enclosure. ## Wiring and terminations Screw terminals accept solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and up to 2x (0.75 to 4 mm²) maximum. For stranded wire, it handles 2x (10 to 50 mm²) — that's the main power feed. The control circuit terminals are sized for 2x (2.5 to 16 mm²) solid or stranded. That's plenty of lug space for a 55 A contactor; you won't be fighting undersized wire clamps. The part is RoHS compliant per the substance prohibition date of May 1, 2012.","metaTitle":"Siemens 3RT1044-1AN10 SIRIUS Power Contactor, S3, 55 A AC-4","metaDescription":"Siemens 3RT1044-1AN10 SIRIUS S3 power contactor, 55 A rated at AC-4, 400 V. Active production. Screw terminals, 35/75 mm rail mount. RoHS compliant.","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 60 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":"60 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 500 V rated value":"37 kW","at 60 Hz rated value":"220 V","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":"20 VA","apparent pick-up power of magnet coil at AC":"232 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":"0.55","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.28","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=354207&mlfb=3RT1044-1AN10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1044-1AN10/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of the 3RT1044-1AN10?","answer":"The depth is 139 mm, which is standard for the S3 frame size."},{"question":"What solid conductor sizes does the 3RT1044-1AN10 accept?","answer":"The screw terminals accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and a maximum of 2x (0.75 to 4 mm²) solid wire."},{"question":"What compliance documentation is available for the 3RT1044-1AN10?","answer":"The part carries a RoHS substance prohibition date of May 1, 2012, indicating compliance with the RoHS directive. It is a Siemens SIRIUS product, so typical documentation includes a CE declaration and UL/CSA file numbers, though those specifics are not in this record."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1044-1AN10","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/3RT1044-1AN10 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}}