{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2038-1AH20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2038-1AH20","canonicalUrl":"https://aoctrl.com/siemens/3RT2038-1AH20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2038-1AH20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, Size S2, 3RT2038-1AH20, 65 A at 480 V AC-3, screw terminals, auxiliary switch, screw and snap-on 35 mm DIN rail mounting.","salesMarkdown":"The Siemens 3RT2038-1AH20 is a SIRIUS Size S2 power contactor rated for 65 A at 480 V in AC-3 duty — that's the motor-switching current, not the resistive-heater number. It carries an auxiliary switch built in, and the coil termination is screw-type, so no special crimp tool on the panel bench. The body is 55 mm wide, 114 mm tall, 130 mm deep — that's a standard S2 footprint, so it lines up with the rest of the SIRIUS 3RT2 family on the rail. Clearance: 10 mm up, down, and forward; 6 mm to the side. ## Switching capacity and life This contactor's AC-3 rating is 65 A at 480 V — that's the motor load it'll switch day in, day out. AC-4 (plugging/inching) drops to 150 operations per hour maximum, while AC-3 runs at 500 ops/hr and AC-1 (resistive) at 700 ops/hr. Arcing time runs 10 to 20 ms; closing time 10 to 18 ms at AC coil. ## Coil and auxiliary specs The auxiliary switch is included from the factory — no add-on module to order separately for basic signaling. Coil voltage and frequency are specified for 50 Hz (0.36 A) and 60 Hz (0.39 A) at 48 V. The contactor also carries rated switching capacities at 24 V (10 A), 48 V (2 A), 60 V (2 A), 110 V (1 A), 125 V (0.9 A), 220 V (0.3 A), 400 V (3 A), and 440 V (0.6 A) — useful if you're running the auxiliary contacts at a different voltage than the main power. ## Environmental limits Main contacts rated 18 to 1.","metaTitle":"Siemens 3RT2038-1AH20 SIRIUS Power Contactor, 65 A at 480 V","metaDescription":"Siemens SIRIUS 3RT2038-1AH20 power contactor, Size S2, 65 A at 480 V AC-3. Screw terminals, auxiliary switch, DIN rail mount. Current production — sourced to order.","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":"Screw-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 DIN rail according to DIN EN 60715","at AC-3e maximum":"500 1/h","For Main Contacts":"18 ... 1","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":"S2","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 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":"48 V","at 500 V rated value":"2 A","at 60 Hz rated value":"48 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","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":"screw-type 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":"Screw-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)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"5.7 W","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","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)","mirror contact according to IEC 60947-4-1":"Yes","with low demand rate according to SN 31920":"40 %","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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=503123&mlfb=3RT2038-1AH20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2038-1AH20/alternatives.json"},"ai":{"faq":[{"question":"Will 3RT2038-1AH20 drop into a panel specified around 3RT2015-1AV02?","answer":"The 3RT2038-1AH20 is a larger frame (Size S2) compared to the 3RT2015 series (Size S0), so it will not physically drop into the same DIN rail footprint without panel rework. The 55 mm width vs the S0's narrower body means you need to check your enclosure fill factor and bus bar spacing."},{"question":"What compliance documentation does this brand provide for 3RT2038-1AH20?","answer":"Siemens SIRIUS contactors typically carry UL, CSA, and CE certifications per the series standard. Specific document packages (declaration of conformity, RoHS/REACH statements) are available on request with the RFQ."},{"question":"What are the key dimensions of 3RT2038-1AH20?","answer":"Width 55 mm, height 114 mm, depth 130 mm. Mounting clearances: 10 mm up/down/forward, 6 mm to the side."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2038-1AH20","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/3RT2038-1AH20 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}}