{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2035-3XF40-0LA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2035-3XF40-0LA2","canonicalUrl":"https://aoctrl.com/siemens/3RT2035-3XF40-0LA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2035-3XF40-0LA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S2, 110 V DC coil, spring-type terminals, 480 V 40 A rated, screw and snap-on DIN rail mount.","salesMarkdown":"## Siemens SIRIUS 3RT2035-3XF40-0LA2 — 110 V DC Power Contactor, Size S2 The Siemens SIRIUS 3RT2035-3XF40-0LA2 is a size S2 power contactor with a 110 V DC coil, spring-type terminals, and a rated operational current of 40 A at 480 V and 41 A at 600 V. The DC coil pulls 1.5 A inrush and picks up at 0.7 × rated voltage (77 V), dropping out at 1.25 × rated (137.5 V). Opening delay on DC is 30–55 ms; arcing time runs 10–20 ms. These numbers matter for sequencing logic — if your PLC output is rated for 24 V DC at 2 A, it will handle the coil inrush, but verify the holding current after pick-up. For AC-4 duty (plugging/reversing), the maximum switching rate is 300 operations per hour — useful for jogging or reversing conveyors where the contactor cycles frequently. ## Mounting and Clearance — Panel Fit Footprint is 55 mm wide × 114 mm high × 130 mm deep. Spring-type terminals accept 2 × (0.5–2.5 mm²) solid or stranded wire. No screw torque to verify — just strip and insert. The part is in current lifecycle stage — no end-of-life notice, no successor announced.","metaTitle":"Siemens 3RT2035-3XF40-0LA2 SIRIUS Power Contactor, 110 V DC","metaDescription":"Siemens SIRIUS 3RT2035-3XF40-0LA2 power contactor, 110 V DC coil, size S2, spring-type terminals, 480 V 40 A rating, current lifecycle stage, available to order. DIN rail mount.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"130 mm","Width":"55 mm","at DC":"30 ... 55 ms","Height":"114 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","Arcing Time":"10 ... 20 ms","At The Side":"6 mm","Rated Value":"110 V","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":"Yes","During Operation":"-40 ... +70 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN 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","Inrush Current Peak":"1.5 A","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":"7.5 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.6 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":"1","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","Locked-Rotor Current Peak":"0.8 A","Relative Humidity Minimum":"10 %","Holding Current Mean Value":"12 mA","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","Duration Of Inrush Current Peak":"50 µs","Locked-Rotor Current Mean Value":"0.45 A","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)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"2.2 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","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":"1","number of NO contacts for auxiliary contacts":"1","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 / 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)","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=466555&mlfb=3RT2035-3XF40-0LA2","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2035-3XF40-0LA2/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RT2035-3XF40-0LA2?","answer":"The 3RT2037-1AL20-ZX95 is a size S2 contactor from the same SIRIUS family, but it uses a different coil voltage and terminal type — verify coil compatibility before substituting. The 3RT2026-1BB40-0UA0 and 3RT2025-2BB44-ZX95 are also SIRIUS contactors but in smaller frame sizes; they will not drop into a panel wired for the size S2 footprint without rewiring."},{"question":"What compliance documentation does this brand provide for 3RT2035-3XF40-0LA2?","answer":"As a Siemens SIRIUS product, it typically ships with a declaration of conformity to IEC/EN 60947-4-1, RoHS compliance, and UL/CSA recognition. Specific certificates can be provided with the order upon request."},{"question":"Where can I buy 3RT2035-3XF40-0LA2?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm offer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2035-3XF40-0LA2","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/3RT2035-3XF40-0LA2 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}}