{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2038-3CL24-3MA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2038-3CL24-3MA0","canonicalUrl":"https://aoctrl.com/siemens/3RT2038-3CL24-3MA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2038-3CL24-3MA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S2 power contactor, 3RT2038-3CL24-3MA0, 65 A at 480 V, 15 hp at 230 V, spring-type terminals, screw and snap-on 35 mm DIN rail mount.","salesMarkdown":"The Siemens SIRIUS 3RT2038-3CL24-3MA0 is a Size S2 power contactor rated for 65 A at 480 V and 15 hp at 230 V, built for switching motor loads in industrial control panels. Its spring-type terminals on the magnet coil and screw/snap-on mounting onto 35 mm DIN rail per DIN EN 60715 mean it lands in a standard panel footprint without special tooling — the 55 mm width and 114 mm height fit a typical 8-module wide enclosure row, provided the 178 mm depth is accounted for in gland-plate planning. ## Duty-cycle limits and thermal reality The contactor is rated for AC-3e maximum switching frequency of 500 1/h and AC-4 maximum at 150 1/h — the AC-4 figure governs plugging or inching duty where the motor is reversed or jogged under load. At AC-1 resistive loads it can cycle up to 700 1/h, but the thermal limit for the coil and main contacts is set by the operating ambient range of -25 to +60 °C, with storage tolerance from -55 to +80 °C. The mechanical endurance of 10 million typical cycles holds the unit on the grid for years in a pump or fan application, provided the electrical load does not exceed the rated making and breaking capacity at the selected duty class. ## Auxiliary contact capacity and wiring The main contact configuration is 18 normally open and 1 normally closed (18...1), and the auxiliary switch is listed as absent — meaning the contactor carries no factory-fitted auxiliary block. The auxiliary contact ratings at 24 V rated value is 6 A, at 48 V rated value 2 A, at 110 V rated value 1 A, and at 230 V rated value 0.3 A. The wire size accepted is 2x (0.5 to 2.5 mm²) solid or stranded, which is standard for control wiring in a 600 V class panel. The spring-type terminals on the coil eliminate the need for screwdriver torque checks during commissioning, provided the strip length is held to the manufacturer's specification.","metaTitle":"Siemens 3RT2038-3CL24-3MA0 SIRIUS Power Contactor, 65 A at 4","metaDescription":"Siemens SIRIUS 3RT2038-3CL24-3MA0 power contactor, S2 frame, 65 A at 480 V, 15 hp at 230 V, spring-type terminals, screw and snap-on DIN rail mount, current lifecycle stage, availa","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"178 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":"No","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 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Power contactor","at 24 V rated value":"6 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","Design Of The Surge Suppressor":"with varistor","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)","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 ... 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)","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 / Q600","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":"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=173816&mlfb=3RT2038-3CL24-3MA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2038-3CL24-3MA0/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RT2038-3CL24-3MA0?","answer":"The listed depth is 178 mm, which must be accounted for in gland-plate planning when mounting in a standard enclosure."},{"question":"What are the key ratings of 3RT2038-3CL24-3MA0?","answer":"The contactor is rated for 65 A at 480 V, 15 hp at 230 V, with a main contact configuration of 18 normally open and 1 normally closed. The auxiliary contact at 24 V rated value is 6 A, and the coil uses spring-type terminals."},{"question":"Where can I buy 3RT2038-3CL24-3MA0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution, with availability and current pricing confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2038-3CL24-3MA0","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/3RT2038-3CL24-3MA0 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}}