{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1044-3EL24","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1044-3EL24","canonicalUrl":"https://aoctrl.com/siemens/3RT1044-3EL24","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1044-3EL24","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S3 power contactor, order code 3RT1044-3EL24, 24 VDC coil, screw and snap-on mounting onto 35 mm and 75 mm standard mounting rail, IP20 front, active lifecycle.","salesMarkdown":"The Siemens 3RT1044-3EL24 is a SIRIUS S3 power contactor — the S3 frame size sits between the compact S2 and the larger S6 in the SIRIUS family, sized for motor switching and resistive loads in industrial control panels. The coil is 24 VDC — a common control voltage across PLC and relay logic panels. Rated operating range at 50 Hz is 0.8 to 1.1 times rated voltage, and at 60 Hz it's 0.85 to 1.1, so the coil holds in through brownout conditions down to about 19.2 VDC. Dropout typically occurs below 18 VDC, which is standard for this class. ## Terminal and enclosure details The main power terminals accept 2x (10... 50 mm²) stranded wire — that's a big lug range, covering everything from 8 AWG up to 1/0 AWG depending on the termination method. The control/auxiliary terminals take 2x (0.25... 2.5 mm²) solid or 2x (2.5... 16 mm²) stranded, which covers standard control wiring. The front of the contactor is IP20 with a cover or box terminal; the terminal body itself is IP00, so the panel enclosure provides the overall ingress protection. It means the contactor is designed for the usual panel conditions, not for clean rooms or sealed electronics cabinets without consideration of condensation. Mechanical shock resistance is 10.6 g for 5 ms and 6.2 g for 10 ms on AC, with DC arcing time of 14 to 20 ms. Those numbers matter if the contactor is mounted near heavy switchgear or on a mobile platform. Dimensions: 163 mm high, 70 mm wide, 188 mm deep.","metaTitle":"Siemens 3RT1044-3EL24 SIRIUS S3 Power Contactor, 24 VDC Coil","metaDescription":"Siemens 3RT1044-3EL24 SIRIUS S3 power contactor, 24 VDC coil, screw and snap-on DIN rail mount, IP20 front. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"188 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"70 mm","at AC":"10.6g / 5 ms, 6.2g / 10 ms","at DC":"14 ... 20 ms","Height":"163 mm","Stranded":"2x (10 ... 50 mm²)","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 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":"230 V","at 500 V rated value":"37 kW","at 60 Hz rated value":"230 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","Design Of The Surge Suppressor":"with RC elements","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":"25 VA","apparent pick-up power of magnet coil at AC":"247 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":"0.62","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.27","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=448301&mlfb=3RT1044-3EL24","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1044-3EL24/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 3RT1044-3EL24?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What wire sizes does the 3RT1044-3EL24 accept?","answer":"Main power terminals accept 2x (10... 50 mm²) stranded. Control/auxiliary terminals accept 2x (0.25... 2.5 mm²) solid or 2x (2.5... 16 mm²) stranded. That covers standard control wiring and motor power cables up to 1/0 AWG."},{"question":"Will the 3RT1044-3EL24 drop into a panel specified for the 3RT1044-1FB46?","answer":"Mechanically yes — same S3 frame, same mounting footprint on 35 mm or 75 mm DIN rail, same side-by-side mounting allowance. Electrically, verify the coil voltage: the -3EL24 is 24 VDC, while the -1FB46 uses a different coil voltage. If your control circuit is 24 VDC, it's a direct swap."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1044-3EL24","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/3RT1044-3EL24 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}}