{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2038-3AL20-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2038-3AL20-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RT2038-3AL20-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2038-3AL20-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, Size S2, 3RT2038-3AL20-1AA0, 65 A at 480 V AC-3, screw and snap-on DIN rail mounting, spring-type coil terminals.","salesMarkdown":"## SIRIUS Size S2 power contactor — 65 A at 480 V, spring-type coil terminals The Siemens 3RT2038-3AL20-1AA0 is a SIRIUS Size S2 power contactor rated for 65 A at 480 V in AC-3 duty, making it suited for switching three-phase motor loads up to that current in a standard 480 V distribution panel. The coil connection uses spring-type terminals, which speed wiring and resist vibration loosening compared to screw clamps. The contactor carries an auxiliary switch block with a configuration of 18 normally-open and 1 normally-closed main contacts, giving flexibility for feedback or interlock circuits without an add-on block. ## Mounting and integration — DIN rail snap-on, 130 mm depth Dimensions are 130 mm deep, 114 mm high, and 55 mm wide — the Size S2 frame fits a standard 55 mm wide DIN-rail slot. The mounting position is standing on a horizontal surface. ## Switching performance across duty classes Maximum operating frequency varies by duty: 700 operations per hour at AC-1 (resistive), 350/h at AC-2 (slip-ring motors), 500/h at AC-3 (squirrel-cage motors), and 150/h at AC-4 (plugging/inching). The AC-3e rating also lists 500/h. Arcing time is 10 to 20 ms; switching time at AC is 10 to 18 ms. For DC switching, the contactor is rated at 24 V for 10 A, 48 V for 2 A, 60 V for 2 A, 110 V for 1 A, 125 V for 0.9 A, 220 V for 0.3 A, 400 V for 3 A, and 440 V for 0.6 A — useful for DC brake or control circuits on the same contactor.","metaTitle":"Siemens 3RT2038-3AL20-1AA0 SIRIUS Power Contactor, 65 A at 4","metaDescription":"Siemens SIRIUS 3RT2038-3AL20-1AA0 power contactor, Size S2, 65 A at 480 V AC-3. Screw and snap-on DIN rail mount. Spring-type coil terminals. Available to order; request RFQ for cu","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"130 mm","Width":"55 mm","at AC":"10 ... 18 ms","Height":"114 mm","Upwards":"10 mm","Forwards":"10 mm","at 50 Hz":"0.36","at 60 Hz":"0.39","Downwards":"10 mm","Arcing Time":"10 ... 20 ms","At The Side":"6 mm","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Spring-type terminals","at AC-1 maximum":"700 1/h","at AC-2 maximum":"350 1/h","at AC-3 maximum":"500 1/h","at AC-4 maximum":"150 1/h","lifecycle_stage":"current","Auxiliary Switch":"Yes","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715","at AC-3e maximum":"500 1/h","For Main Contacts":"18 ... 1","Mounting Position":"standing, on horizontal mounting surface","Size Of Contactor":"S2","Solid Or Stranded":"2x (0.5 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Power contactor","at 24 V rated value":"10 A","at 48 V rated value":"2 A","at 60 V rated value":"2 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 125 V rated value":"0.9 A","at 220 V rated value":"0.3 A","at 230 V rated value":"15 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.6 A","at 480 V rated value":"65 A","at 50 Hz rated value":"230 V","at 500 V rated value":"2 A","at 60 Hz rated value":"230 V","at 600 V rated value":"62 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Auxiliary Contacts":"20 ... 14","For Main Current Circuit":"screw-type terminals","at 110/120 V rated value":"5 hp","at 200/208 V rated value":"20 hp","at 220/230 V rated value":"25 hp","at 460/480 V rated value":"50 hp","at 575/600 V rated value":"60 hp","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"6 kV","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"17.1 W","at AC-2 at 400 V rated value":"37 kW","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"55 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"10/01/2014","at AWG cables for main contacts":"2x (18 ... 2), 1x (18 ... 1)","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"79.2 A","at AC-5b up to 400 V rated value":"66.4 A","For Auxiliary And Control Circuit":"spring-loaded terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 160A (690V,100kA), aM: 80A (690V,100kA), BS88: 125A (415V,80kA)","Without Load Current Share Typical":"17.2 W","At Contactor For Auxiliary Contacts":"Spring-type terminals","With Type Of Coordination 1 Required":"gG: 250 A (690 V, 100 kA), aM: 160 A (690 V, 100 kA), BS88: 200 A (415 V, 80 kA)","at AWG cables for auxiliary contacts":"2x (20 ... 14)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"5.7 W","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)","Number Of Poles For Main Current Circuit":"3","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","mirror contact according to IEC 60947-4-1":"Yes","with low demand rate according to SN 31920":"40 %","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","with high demand rate according to SN 31920":"73 %","Type Of Voltage Of The Control Supply Voltage":"AC","Limited To 1 S Switching At Zero Current Maximum":"1 298 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"898 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"640 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"414 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"333 A; Use minimum cross-section acc. to AC-1 rated value","contact rating of auxiliary contacts according to UL":"A600 / P600","Of Main Circuit With Degree Of Pollution 3 Rated Value":"690 V","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","Of Auxiliary Circuit With Degree Of Pollution 3 Rated Value":"690 V","For Short-Circuit Protection Of The Auxiliary Switch Required":"gG: 10 A (500 V, 1 kA)","minimum cross-section in main circuit at maximum AC-1 rated value":"35 mm²","number of NC contacts for auxiliary contacts instantaneous contact":"1","number of NO contacts for auxiliary contacts instantaneous contact":"1","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":"https://cdn.aoctrl.com/902fcb333954acc639ba909da339031f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=475678&mlfb=3RT2038-3AL20-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2038-3AL20-1AA0/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions of this contactor?","answer":"The contactor measures 130 mm deep, 114 mm high, and 55 mm wide — the Size S2 frame fits a standard 55 mm DIN-rail slot."},{"question":"What is the maximum current rating at 480 V?","answer":"The contactor is rated for 65 A at 480 V in AC-3 duty, suitable for switching three-phase motor loads up to that current."},{"question":"Where can I buy 3RT2038-3AL20-1AA0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote to confirm current availability and pricing."},{"question":"Does 3RT2038-3AL20-1AA0 drop into a panel specified for 3RT2015-2AP02?","answer":"The 3RT2038 is a Size S2 frame (55 mm wide), while the 3RT2015 is a smaller Size S0 frame. The physical footprint and terminal layout differ, so direct drop-in replacement without rewiring or rail repositioning is not expected. Verify panel layout and wiring before substitution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2038-3AL20-1AA0","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/3RT2038-3AL20-1AA0 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}}