{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT5044-1AN20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT5044-1AN20","canonicalUrl":"https://aoctrl.com/siemens/3RT5044-1AN20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT5044-1AN20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT5044-1AN20 power contactor, S3 frame, 70 mm wide, screw/snap-on DIN rail mounting, rated AC-3e at 1000 V.","salesMarkdown":"Mounts via screw or snap-on onto 35 mm and 75 mm DIN rail, with mounting position flexibility: ±180° rotation on a vertical surface, and ±22.5° tilt forward/backward. Side-by-side mounting is permitted, which simplifies dense panel layouts. The S3 frame occupies 70 mm width and 146 mm height, with a depth of 139 mm. Main circuit connections accept screw-type terminals for 2x (2.5 to 16 mm²) solid or stranded wire, or 2x (10 to 1/0 AWG). ## Switching performance and ratings Rated for 5000 operating cycles per hour at AC, with maximum rates of 1000 cycles/h for AC-1, AC-3, and AC-3e duty, and 300 cycles/h for AC-4. The AC-3e rating at 1000 V is the headline motor-switching capability — this contactor handles motor starts and stops within that voltage and duty cycle without derating. Coil draw at 24 V is 6 A; at 110 V it drops to 1 A, and at 220/230 V to 0.3 A. The coil is rated for both 50 Hz and 60 Hz operation at 220 V with a power factor of 0.27. Power-switching capability at 60 °C ambient: 34 kW at 230 V, 59 kW at 400 V, and 102 kW at 690 V. RoHS compliant with a substance prohibition date of 03/01/2017.","metaTitle":"Siemens 3RT5044-1AN20 SIRIUS Power Contactor, S3, 70 mm","metaDescription":"Siemens SIRIUS 3RT5044-1AN20 power contactor, S3 frame, 70 mm wide, rated for AC-3e at 1000 V. Current production. Screw/snap-on 35/75 mm DIN rail. RoHS compliant since 03/01/2017.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"139 mm","Width":"70 mm","at AC":"5 000 1/h","Height":"146 mm","at 50 Hz":"0.27","at 60 Hz":"0.27","During Storage":"-55 ... +80 °C","at AC-1 maximum":"1 000 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 DIN rail","at AC-3e maximum":"1 000 1/h","Mounting Position":"+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface","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":"6 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":"220 V","at 60 Hz rated value":"220 V","at 690 V rated value":"18.6 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-3e rated value maximum":"1 000 V","Substance Prohibitance (Date)":"03/01/2017","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 400 V at 60 °C rated value":"59 kW","at 690 V at 60 °C rated value":"102 kW","at AWG cables for main contacts":"2x (10 ... 1/0)","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"Yes","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","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)","at ambient temperature 40 °C rated value":"100 A","at ambient temperature 60 °C rated value":"90 A","Finely Stranded Without Core End Processing":"2x (10 ... 35 mm²)","Type Of Voltage Of The Control Supply Voltage":"AC","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","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"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/6ccebf26e0eabe8a9821bfdd12a99568.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=580019&mlfb=3RT5044-1AN20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT5044-1AN20/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to 3RT5044-1AN20?","answer":"The peer 3RT1034-1AN60-1AA0 is a SIRIUS contactor in the S3 frame, but it carries different coil ratings and auxiliary contact configurations. Verify the coil voltage and auxiliary block match your BOM before substituting — the frame size and main terminal layout are similar, but the control circuit differs."},{"question":"What are the mounting dimensions for 3RT5044-1AN20?","answer":"Width is 70 mm, height is 146 mm, and depth is 139 mm. It mounts on 35 mm or 75 mm DIN rail via screw or snap-on."},{"question":"Will 3RT5044-1AN20 drop into a panel specified around 3RT1034-1AN60-1AA0 without rewiring?","answer":"Both are S3 frame contactors with the same width (70 mm) and similar terminal layouts for the main circuit. However, the coil ratings differ — 3RT5044-1AN20 draws 6 A at 24 V, while the peer may have a different coil. Check the coil voltage and auxiliary contact arrangement before assuming a drop-in replacement."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT5044-1AN20","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/3RT5044-1AN20 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}}