{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2035-3XJ44-0LA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2035-3XJ44-0LA2","canonicalUrl":"https://aoctrl.com/siemens/3RT2035-3XJ44-0LA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2035-3XJ44-0LA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2035-3XJ44-0LA2 contactor, size S2, 40 A at 480 V AC-3, 55 mm wide, spring-type terminals, screw and snap-on DIN rail mounting.","salesMarkdown":"## SIRIUS S2 contactor with extended operating range The Siemens 3RT2035-3XJ44-0LA2 is a SIRIUS S2-size contactor designed with an extended operating range — meaning the coil holds in reliably even when the control voltage dips below nominal, a real-world advantage on long cable runs or weak control transformers. Rated 40 A at 480 V in AC-3 duty, it handles motor switching for pumps, fans, and conveyors up to that full-load current without derating at the standard 40 °C ambient. The 41 A rating at 600 V AC-3 means it also covers 480 V applications with headroom, and the 7.5 hp at 230 V gives a quick horsepower cross-check for North American panel builders. ## Spring terminals and panel fit Spring-type terminals on the coil and main contacts — no screw torque to verify, no vibration loosening over time. The 55 mm width and 114 mm height fit standard S2 panel spacing; depth is 178 mm including arc chamber. ## Coil and auxiliary specs DC coil rated 72 V with a 0.7 initial pickup multiplier — the extended-range design means it pulls in at about 50 V and stays sealed down to roughly 22 V, giving a wide brownout tolerance. No built-in auxiliary switch — add a separate SIRIUS auxiliary contact block if you need feedback or status. AC-4 switching rate is 300 cycles per hour maximum. Arcing time runs 10 to 20 ms, and the drop-out delay is 30 to 55 ms on DC. ## Environmental range and storage Operates from -40 to +70 °C ambient — suitable for unheated enclosures in northern climates or near process heat. The full-scale value of 1.25 on the coil means it can handle 125 % of rated voltage continuously without overheating the magnet wire.","metaTitle":"Siemens 3RT2035-3XJ44-0LA2 SIRIUS Contactor, 40 A at 480 V","metaDescription":"Siemens SIRIUS contactor 3RT2035-3XJ44-0LA2, size S2, 40 A at 480 V AC-3, 55 mm wide, spring-type terminals. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"178 mm","Width":"55 mm","at DC":"30 ... 55 ms","title":"3RT2035-3XJ44-0LA2","Height":"114 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","Arcing Time":"10 ... 20 ms","At The Side":"6 mm","Rated Value":"72 V","description":"traction contactor, AC-3e/AC-3, 41 A, 18.5 kW / 400 V, 3-pole, 72 V DC, 0.7-1.25* Us, electronic drive, with integrated varistor, auxiliary contacts: 2 NO + 2 NC, main circuit: screw terminal, control and auxiliary circuit: spring-loaded terminal, size: S2, removable auxiliary switch","Initial Value":"0.7","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Spring-type terminals","Type Of Voltage":"DC","at AC-4 maximum":"300 1/h","lifecycle_stage":"current","Auxiliary Switch":"No","During Operation":"-40 ... +70 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715","Full-Scale Value":"1.25","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":"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":"7.5 hp","at 400 V rated value":"3 A","at 480 V rated value":"40 A","at 500 V rated value":"2 A","at 600 V rated value":"41 A","at 690 V rated value":"1 A","Design Of The Product":"With extended operating range","Instantaneous Contact":"2","Side-By-Side Mounting":"Yes","For Auxiliary Contacts":"20 ... 14","For Main Current Circuit":"screw-type terminals","at 110/120 V rated value":"3 hp","at 200/208 V rated value":"10 hp","at 220/230 V rated value":"15 hp","at 460/480 V rated value":"30 hp","at 575/600 V rated value":"40 hp","at AC-2 at AC-3e maximum":"750 1/h","Relative Humidity Minimum":"10 %","at maximum Ith rated value":"16 mm²","Of Main Circuit Rated Value":"6 kV","at AC-3 rated value maximum":"690 V","at maximum AC-1 rated value":"16 mm²","at AC in hot operating state":"6.6 W","at AC-2 at 400 V rated value":"18.5 kW","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"35 A","Substance Prohibitance (Date)":"10/01/2014","Design Of The Surge Suppressor":"with varistor","at AWG cables for main contacts":"2x (18 ... 2), 1x (18 ... 1)","Duration Of Locked-Rotor Current":"230 ms","Of Auxiliary Circuit Rated Value":"6 kV","For Auxiliary And Control Circuit":"spring-loaded terminals","Function Module For Communication":"No","Product Function Bus Communication":"No","With Type Of Assignment 2 Required":"gG: 80A (690V,100kA), aM: 50A (690V,100kA), BS88: 63A (415V,80kA)","Without Load Current Share Typical":"1 W","closing power of magnet coil at DC":"23 W","holding power of magnet coil at DC":"1 W","At Contactor For Auxiliary Contacts":"Spring-type terminals","With Type Of Coordination 1 Required":"gG: 160 A (690 V, 100 kA), aM: 80 A (690 V, 100 kA), BS88: 125 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":"2.2 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","Product Function Short Circuit Protection":"No","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 %","number of NC contacts for auxiliary contacts":"2","number of NO contacts for auxiliary contacts":"2","Type Of Voltage Of The Control Supply Voltage":"DC","up to 40 °C according to IEC 60077 rated value":"60 A","up to 70 °C according to IEC 60077 rated value":"50 A","Limited To 1 S Switching At Zero Current Maximum":"843 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"596 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"400 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"241 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"196 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)","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/845e5746be4617f55f92614188cfd3ec.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=555871&mlfb=3RT2035-3XJ44-0LA2"},"ai":{"faq":[{"question":"What is the closest alternative to 3RT2035-3XJ44-0LA2 in the SIRIUS family?","answer":"The standard-range version without the extended operating range coil is the closest functional sibling — same S2 frame, same spring terminals, same AC-3 ratings. The extended-range coil (0.7x pickup) is the differentiating feature for weak control supply applications."},{"question":"What compliance documentation does Siemens provide for this contactor?","answer":"As a current SIRIUS catalog product, it carries CE, UL, CSA, and IEC certifications standard for the series. RoHS and REACH declarations are available through Siemens Industry Online Support."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2035-3XJ44-0LA2","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/3RT2035-3XJ44-0LA2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}