{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1044-3AF04","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1044-3AF04","canonicalUrl":"https://aoctrl.com/siemens/3RT1044-3AF04","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1044-3AF04","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1044-3AF04, S3 frame, 30 kW AC-2 at 400 V, 55 A AC-4, screw terminals, snap-on DIN rail.","salesMarkdown":"The headline motor-switching rating is 30 kW under AC-2 duty at 400 V — that's the category for slip-ring motors, wound-rotor drives, and other loads where starting current and switching frequency are moderate. For the heavier AC-4 duty (plugging, inching, reversing), it's rated 55 A at 400 V, which covers frequent jogging or reversing cycles without derating the contactor prematurely. The contactor carries a mechanical life of 10 million operations typical, and the electrical endurance varies by duty: up to 1,000 cycles per hour in AC-1 and AC-3, 400 cycles per hour in AC-2, and 300 cycles per hour in AC-4. That means it's built for continuous process lines where the contactor cycles several times a minute, not just a start-stop once per shift. The coil draws 10 A at 24 V rated value, with lower draws at higher control voltages — 6 A at 230 V, 3 A at 400 V, and 1 A at 110 V. The main circuit uses screw-type terminals, accepting solid conductors 2x (0.25 to 2.5 mm²) and stranded 2x (10 to 50 mm²). The IP20 front protection (IP20 on the front with cover or box terminal) means it's safe for finger contact in a closed panel, while the terminal itself is IP00 — so it requires enclosure protection against tools and debris. The contactor carries a substance prohibitance date of 05/01/2012, indicating RoHS compliance (EU RoHS 2011/65/EU). That covers most indoor industrial installations, including non-conditioned electrical rooms in warm climates.","metaTitle":"Siemens 3RT1044-3AF04 SIRIUS Power Contactor, 30 kW AC-2, S3","metaDescription":"Siemens 3RT1044-3AF04 SIRIUS power contactor, S3 size, 30 kW at AC-2 400 V, 55 A AC-4. Screw terminals, snap-on DIN rail. Current production. RoHS compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"188 mm","Solid":"2x (0.25 ... 2.5 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":"110 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":"spring-loaded 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 (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":"600 A","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 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":"2","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=216921&mlfb=3RT1044-3AF04","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1044-3AF04/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions for panel layout?","answer":"The contactor measures 146 mm height, 70 mm width, and 188 mm depth. It mounts on 35 mm or 75 mm standard DIN rails via screw and snap-on."},{"question":"What compliance documentation is available?","answer":"The part has a RoHS substance prohibitance date of 05/01/2012, confirming compliance with EU RoHS. It is rated for pollution degree 3, suitable for industrial environments."},{"question":"Can this contactor handle reversing or jogging duty?","answer":"Yes, it is rated 55 A at AC-4 duty at 400 V, which covers plugging, inching, and reversing applications. The maximum switching frequency in AC-4 is 300 cycles per hour."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1044-3AF04","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/3RT1044-3AF04 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}}