{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1044-3AV00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1044-3AV00","canonicalUrl":"https://aoctrl.com/siemens/3RT1044-3AV00","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1044-3AV00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S3, 3RT1044-3AV00, 37 kW at 500 V, 55 A AC-4 at 400 V, screw terminals, snap-on mounting.","salesMarkdown":"The Siemens 3RT1044-3AV00 is a SIRIUS size S3 power contactor — screw-type terminals on the main circuit, rated for motor switching up to 37 kW at 500 V and 18.6 kW at 690 V. The 37 kW rating at 500 V is the AC-3 motor-switching figure — that's the real-world number for sizing across a pump, fan, or conveyor. The front is IP20 with the cover or box terminal installed; the terminal area itself is IP00, so panel builders need to account for clearance and creepage distances inside the enclosure. Main circuit terminals accept solid conductors from 0.25 to 2.5 mm² (two per clamp) and stranded from 10 to 50 mm² (two per clamp). The auxiliary/control circuit takes 2x 0.25–2.5 mm² solid or 2x 10–50 mm² stranded. All are screw-type — no special tooling needed, but torque to the manufacturer's spec on the nameplate.","metaTitle":"Siemens 3RT1044-3AV00 SIRIUS Power Contactor, 37 kW at 500 V","metaDescription":"Siemens 3RT1044-3AV00 SIRIUS size S3 power contactor. 37 kW at 500 V, 55 A AC-4 at 400 V. Screw terminals, snap-on DIN rail. Current production. Sourced to order. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"139 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":"400 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":"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=331669&mlfb=3RT1044-3AV00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1044-3AV00/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of the 3RT1044-3AV00?","answer":"Depth is 139 mm, height is 146 mm, width is 70 mm — size S3 footprint."},{"question":"Will the 3RT1044-3AV00 drop into a panel specified for 3RT1044-1FB46?","answer":"Both are size S3 SIRIUS contactors with the same mounting rail (35/75 mm) and screw terminals. The 3RT1044-3AV00 uses a different coil voltage and auxiliary configuration — verify the control circuit before swapping, but the mechanical fit is identical."},{"question":"Where can I buy the 3RT1044-3AV00?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1044-3AV00","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/3RT1044-3AV00 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}}