{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1044-1AU60","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1044-1AU60","canonicalUrl":"https://aoctrl.com/siemens/3RT1044-1AU60","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1044-1AU60","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S3, 3RT1044-1AU60, screw terminals, 55 A AC-4 at 400 V, snap-on DIN rail.","salesMarkdown":"It is rated for AC-4 duty at 55 A at 400 V, meaning it can handle the severe inrush and plugging duty of reversing or jogging motor applications up to that current. For AC-2 duty (slip-ring motors), it is rated at 30 kW at 400 V. The main power circuit uses screw-type terminals, accepting solid conductors up to 4 mm² (2x) and stranded conductors up to 50 mm² (2x). This is a wired connection, not push-in, so plan for screwdriver torqueing during installation. The contactor carries an IP20 rating on the front with the cover or box terminal installed, which is standard for panel-mount gear — it keeps fingers out but is not rated for washdown. AC-4 covers starting and plugging of squirrel-cage motors — the high inrush and repeated switching that cooks underrated contacts. If your application involves reversing, inching, or jogging, use this rating for contactor selection, not the higher AC-3 or AC-1 values. The AC-3 rating (not directly listed in the provided specs) would typically be higher, suitable for normal motor start/run duty, but the AC-4 figure governs the toughest cycle. The contactor's mechanical life is typical at 10 million operations, and it supports side-by-side mounting without derating. Maximum switching frequency ranges from 300 cycles/hour at AC-4 up to 1000 cycles/hour at AC-1 and AC-3, so it can keep up with high-speed cycling in packaging or material handling lines. The contactor is 70 mm wide, 146 mm tall, and 139 mm deep. That depth includes the terminals and arc chamber, so account for it when laying out the DIN rail and enclosure depth — 139 mm is not shallow, and you'll need clearance for wiring behind the panel. The screw terminals on the main circuit accept 2x (0.5 to 4 mm²) solid or 2x (10 to 50 mm²) stranded, so plan for proper ferrule sizing and torque settings per Siemens guidelines. The snap-on feature speeds installation, but the screw adds security for high-vibration environments. Side-by-side mounting is permitted, which saves rail space when multiple contactors are ganged for multi-motor control.","metaTitle":"Siemens 3RT1044-1AU60 SIRIUS Power Contactor, 55 A AC-4, S3","metaDescription":"Siemens 3RT1044-1AU60 SIRIUS power contactor, size S3, rated 55 A at 400 V AC-4. Screw terminals, snap-on DIN rail. Current production. RFQ for pricing and lead time.","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 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":"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 500 V rated value":"37 kW","at 60 Hz rated value":"277 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=456468&mlfb=3RT1044-1AU60","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1044-1AU60/alternatives.json"},"ai":{"faq":[{"question":"What are the key electrical ratings for this contactor?","answer":"The key rating is AC-4 at 55 A at 400 V, which governs reversing and jogging duty. For AC-2 slip-ring motor duty, it is rated at 30 kW at 400 V. The contactor also has a rated operational voltage of up to 690 V and various auxiliary contact ratings at different control voltages."},{"question":"How does the 3RT1044-1AU60 compare to the 3RT1036-1AB00?","answer":"The 3RT1044-1AU60 is a size S3 frame, larger than the 3RT1036 which is typically a smaller frame. The 3RT1044 carries a higher AC-4 current rating (55 A vs lower for the 1036) and uses screw terminals for the main circuit, while the 3RT1036 may have different terminal options. They are not direct drop-in replacements; the 3RT1044 requires more panel space and has different mounting and wiring requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1044-1AU60","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/3RT1044-1AU60 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}}