{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1044-1AK60-ZW96","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1044-1AK60-ZW96","canonicalUrl":"https://aoctrl.com/siemens/3RT1044-1AK60-ZW96","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1044-1AK60-ZW96","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1044-1AK60-ZW96 power contactor, size S3, 37 kW at 500 V, 18.6 kW at 690 V, screw-type terminals, snap-on DIN rail mounting.","salesMarkdown":"It carries a 37 kW rating at 500 V and 18.6 kW at 690 V, so it handles medium-horsepower induction motors in pumps, fans, and compressors up to that power range. Mounts on 35 mm or 75 mm standard DIN rail via screw and snap-on fastening, and side-by-side mounting is permitted — no gap needed between units in a dense panel layout. The main current circuit uses screw-type terminals, accepting stranded conductors up to 2x 50 mm² and solid conductors from 0.5 mm² up to 4 mm² on the control side. That covers most panel wiring from signal-level through motor feeders. Rated 37 kW at 500 V (AC-3 duty) and 18.6 kW at 690 V — those are the motor-switching numbers that govern real-world load selection. AC-1 (resistive) and AC-4 (plugging/inching) ratings are lower, so don't size this contactor by the AC-1 figure if you're switching motor loads. The -25 °C low end means it starts reliably in cold plant conditions or unheated enclosures; the +60 °C ceiling accommodates panels near furnaces or in hot climates without derating the thermal curve. Front protection is IP20 with cover or box terminal; the terminal itself is IP00. That's standard for panel-mounted contactors — the IP20 front keeps fingers off live parts once the enclosure door is closed, but the terminals themselves need enclosure protection. ## DIN Rail Integration and Panel Fit At 70 mm wide, 146 mm tall, and 139 mm deep, the S3 frame fits a standard DIN-rail footprint. The 139 mm depth is the critical dimension for enclosure depth selection — make sure your cabinet has at least 150 mm clear depth behind the rail to accommodate wiring and bending radius on the screw terminals. Snap-on mounting onto 35 mm or 75 mm rail means no tools needed for installation or removal — useful for panel builders who need to swap units during commissioning without disturbing adjacent wiring.","metaTitle":"Siemens 3RT1044-1AK60-ZW96 SIRIUS Power Contactor, S3, 37 kW","metaDescription":"Siemens SIRIUS 3RT1044-1AK60-ZW96 power contactor, size S3. Rated 37 kW at 500 V, 18.6 kW at 690 V. Screw terminals, snap-on DIN rail mount. Active production. RFQ for pricing.","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":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=48594&mlfb=3RT1044-1AK60-ZW96","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1044-1AK60-ZW96/alternatives.json"},"ai":{"faq":[{"question":"What are the key motor power ratings for this contactor?","answer":"It is rated 37 kW at 500 V and 18.6 kW at 690 V under AC-3 duty (squirrel-cage motor switching). Those are the figures to use when sizing for induction motor loads."},{"question":"What wire sizes does the screw terminal accept?","answer":"For the main circuit, it accepts stranded conductors up to 2x 50 mm². For control wiring, it accepts solid conductors from 0.5 mm² up to 4 mm², or stranded from 0.75 mm² up to 2.5 mm²."},{"question":"What mounting options does this contactor support?","answer":"It mounts via screw and snap-on onto 35 mm or 75 mm standard DIN rail. Side-by-side mounting is permitted without spacing between units."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1044-1AK60-ZW96","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-ZW96 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}}