{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1044-1AP64","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1044-1AP64","canonicalUrl":"https://aoctrl.com/siemens/3RT1044-1AP64","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1044-1AP64","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S3, 3RT1044-1AP64, rated 37 kW at 500 V AC-3, 50/60 Hz, screw-type terminals, IP20 front protection.","salesMarkdown":"## SIRIUS power contactor, size S3 — 37 kW at 500 V The Siemens 3RT1044-1AP64 is a SIRIUS power contactor in size S3, rated for motor switching at 37 kW on a 500 V AC-3 supply. It handles the same load at 690 V for 18.6 kW, so it covers 400 V class motors comfortably with headroom. The contactor is rated for both 50 Hz and 60 Hz networks, with an operating range of 0.8 to 1.1 times nominal frequency — stable for variable-frequency drive input switching or direct-on-line starts. Screw-type terminals on the main circuit accept solid conductors from 0.5 mm² up to 4 mm² per clamp, and stranded runs from 10 mm² to 50 mm². That covers panel wiring from control-circuit taps up to the motor feeder. The auxiliary contacts handle 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V — enough for PLC feedback or status indication on the line side. At 70 mm wide, 146 mm tall, and 188 mm deep, it fits a standard size S3 footprint — expect to leave clearance for the arcing space and terminal access. Electrical endurance depends on the duty category: AC-1 (resistive loads) allows up to 1,000 operations per hour, AC-3 (motor starting) also 1,000 per hour, AC-2 (slip-ring motors) 400 per hour, and AC-4 (plugging/inching) 300 per hour. The arcing time sits between 10 and 15 ms, with total AC switching time from coil energization to main contact closure at 10 to 19 ms.","metaTitle":"Siemens 3RT1044-1AP64 SIRIUS Power Contactor, Size S3, 37 kW","metaDescription":"Siemens 3RT1044-1AP64 SIRIUS power contactor, size S3, rated 37 kW at 500 V AC-3. Screw terminals, IP20 front. Current lifecycle stage. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"188 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","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":"50 Hz","2 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 50 Hz rated value":"220 V","at 500 V rated value":"37 kW","at 60 Hz rated value":"240 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":"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=366774&mlfb=3RT1044-1AP64","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1044-1AP64/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for 3RT1044-1AP64?","answer":"Rated 37 kW at 500 V AC-3, 18.6 kW at 690 V AC-3. Mechanical life is 10 million operations. Screw terminals accept solid 0.5–4 mm² and stranded 10–50 mm². IP20 front protection."},{"question":"Where can I buy 3RT1044-1AP64?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the difference between 3RT1044-1AP64 and 3RT1044-1FB46?","answer":"The 3RT1044-1FB46 is a functionally similar SIRIUS contactor in the same size S3 frame. The primary difference is the coil voltage and terminal configuration — the 1AP64 uses screw-type terminals, while the 1FB46 uses spring-cage terminals. Both mount on the same DIN rail footprint and share the same power ratings, so a panel designed for one can accept the other without rewiring the main circuit, though the control wiring termination method changes."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1044-1AP64","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/3RT1044-1AP64 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}}