{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1044-1AK60","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1044-1AK60","canonicalUrl":"https://aoctrl.com/siemens/3RT1044-1AK60","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1044-1AK60","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1044-1AK60, S3 frame, 37 kW at 500 V AC-3, screw-type terminals, snap-on mounting for 35 mm and 75 mm rail, IP20 front.","salesMarkdown":"It's rated 37 kW at 500 V AC-3 and 18.6 kW at 690 V AC-3, which means it handles the full-load current of a 37 kW induction motor on a 500 V line or a smaller motor on a 690 V supply without derating the contactor. Mounting is screw-and-snap-on onto standard 35 mm or 75 mm DIN rail, so it drops into any panel that already uses the SIRIUS S3 footprint. The 37 kW at 500 V AC-3 rating is the motor-switching figure that governs real use — AC-3 covers starting and disconnecting squirrel-cage motors under load. The 50 Hz and 60 Hz operating range is 0.8 to 1.1 times the rated voltage, so it holds in on weak grids or genset supplies. That's enough for a conveyor start-stop duty cycle running 8 hours a day, but not for a high-speed pick-and-place application where you'd need a dedicated motor-contactor with a higher mechanical endurance. The contactor is 70 mm wide, 146 mm high, and 139 mm deep — the S3 footprint. The front has IP20 protection with the cover or box terminal installed, which is the usual for a panel interior; the terminal itself is IP00, meaning it's not touch-safe until the enclosure door is closed. Wire sizes: solid conductors accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²), and stranded goes up to 2x (10 to 50 mm²). The main circuit terminals are screw-type, so you'll need a torque screwdriver — no spring-cage here. For sourcing, this is a quoted-to-order line item. The SIRIUS S3 contactor family is widely stocked by Siemens distributors, but the exact 3RT1044-1AK60 variant with screw terminals and the 500 V / 690 V rating block may not sit on every shelf. An RFQ is the right move to confirm lead time and quantity breaks.","metaTitle":"Siemens 3RT1044-1AK60 SIRIUS Power Contactor, 37 kW at 500 V","metaDescription":"Siemens SIRIUS 3RT1044-1AK60 power contactor, S3 frame, 37 kW at 500 V AC-3, screw terminals, snap-on 35/75 mm rail, IP20 front. Current lifecycle stage.","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","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":"110 V","at 500 V rated value":"37 kW","at 60 Hz rated value":"120 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":"$228.60","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=380338&mlfb=3RT1044-1AK60","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1044-1AK60/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to the 3RT1044-1AK60?","answer":"The 3RT1036-1AB00 is a smaller SIRIUS contactor (S2 frame) with a lower current rating, so it won't drop into the same panel without rewiring. The 3RT1044-1AK60 is the S3 frame; the 3RT1036 is physically smaller and rated for lower motor power. If you need the same footprint and terminal layout, stay with the S3 frame — the 3RT1044 is the correct size."},{"question":"What is the depth of the 3RT1044-1AK60?","answer":"The depth is 139 mm, which is the S3 frame dimension. This matters for enclosure depth clearance when mounting on a 35 mm or 75 mm DIN rail."},{"question":"What solid conductor sizes does the 3RT1044-1AK60 accept?","answer":"The main circuit terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid conductors, with a maximum of 2x (0.75 to 4 mm²). Stranded conductors go up to 2x (10 to 50 mm²)."},{"question":"Will the 3RT1044-1AK60 drop into a panel specified around the 3RT1036-1AB00 without rewiring?","answer":"No. The 3RT1044-1AK60 is an S3 frame contactor (70 mm wide, 146 mm high, 139 mm deep), while the 3RT1036-1AB00 is an S2 frame. The mounting hole pattern and terminal positions are different, so you would need to re-drill the mounting plate and re-route the wiring. Stick with the same frame size for a drop-in replacement."},{"question":"What compliance documentation does Siemens provide for the 3RT1044-1AK60?","answer":"As a Siemens SIRIUS product, this contactor carries CE marking for the European market and is designed to meet IEC/EN 60947-4-1 for contactors and motor-starters. UL and CSA listings are typical for the SIRIUS line, but the exact certification numbers depend on the specific variant and should be confirmed on the nameplate or via the Siemens Industry Online Support portal."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1044-1AK60","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/3RT1044-1AK60 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}}