{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2046-1KB40-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2046-1KB40-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RT2046-1KB40-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2046-1KB40-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, coupling contactor, 3RT2046-1KB40-1AA0, 24 VDC coil, S3 frame, screw-type terminals, 70 mm width, 152 mm depth, 140 mm height.","salesMarkdown":"## SIRIUS coupling contactor, S3 frame, 24 VDC coil It carries a 24 VDC coil with a peak inrush of 2.7 A, and the coil termination uses screw-type terminals. The envelope measures 70 mm wide by 140 mm tall by 152 mm deep, with a 10 mm clearance required at the side and 10 mm upward and downward for arc containment. Wire range accepts solid conductors from 2.5 to 16 mm² and stranded from 6 to 70 mm², with a dual-wire capability of 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) for auxiliary connections. ## Switching frequency and duty-cycle ratings Maximum switching frequency varies by duty class: 900 operations per hour at AC-1 (resistive), 850 at AC-3 and AC-3e (motor starting), 350 at AC-2 (slip-ring motor), and 250 at AC-4 (plugging/inching). Auxiliary contact ratings are voltage-dependent: 10 A at 24 V, 2 A at 48 V or 60 V, 1 A at 110 V, 0.9 A at 125 V, and 0.3 A at 220 V. ## Environmental limits and mechanical endurance Mechanical life of the contactor is rated at 10 million typical operations. Vibration resistance is specified at 9.8 g for 5 ms and 5.6 g for 10 ms under AC conditions.","metaTitle":"Siemens 3RT2046-1KB40-1AA0 SIRIUS Coupling Contactor, 24 VDC","metaDescription":"Siemens SIRIUS 3RT2046-1KB40-1AA0 coupling contactor, 24 VDC coil, S3 frame, screw terminals, 70 mm wide, active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"152 mm","Solid":"2.5 ... 16 mm²","Width":"70 mm","at AC":"9.8 g / 5 ms, 5.6 g / 10 ms","at DC":"38 ... 57 ms","Height":"140 mm","Upwards":"10 mm","Forwards":"20 mm","Stranded":"6 ... 70 mm²","Downwards":"10 mm","Arcing Time":"10 ... 20 ms","At The Side":"10 mm","Rated Value":"24 V","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","at AC-1 maximum":"900 1/h","at AC-2 maximum":"350 1/h","at AC-3 maximum":"850 1/h","at AC-4 maximum":"250 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","Full-Scale Value":"1.2","at AC-3e maximum":"850 1/h","For Main Contacts":"10 ... 2","Mounting Position":"standing, on horizontal mounting surface","Size Of Contactor":"S3","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Inrush Current Peak":"2.7 A","Product Designation":"Coupling 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":"20 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.8 A","at 480 V rated value":"96 A","at 500 V rated value":"2 A","at 600 V rated value":"77 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","at 1000 V rated value":"37 kW","For Auxiliary Contacts":"20 ... 14","For Main Current Circuit":"screw-type terminals","at 110/120 V rated value":"10 hp","at 200/208 V rated value":"30 hp","at 220/230 V rated value":"30 hp","at 460/480 V rated value":"75 hp","at 575/600 V rated value":"75 hp","Locked-Rotor Current Peak":"2.1 A","Relative Humidity Minimum":"10 %","Holding Current Mean Value":"40 mA","Of Main Circuit Rated Value":"8 kV","Safety-Related Switching On":"No","at AC-3 rated value maximum":"1 000 V","at AC in hot operating state":"19.8 W","at AC-2 at 400 V rated value":"45 kW","at AC-3e rated value maximum":"1 000 V","at AC-4 at 400 V rated value":"80 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"03/01/2017","Design Of The Surge Suppressor":"with varistor","Duration Of Inrush Current Peak":"50 µs","Locked-Rotor Current Mean Value":"0.9 A","at AWG cables for main contacts":"2x (10 ... 1/0), 1x (10 ... 2)","Duration Of Locked-Rotor Current":"150 ms","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"114 A","at AC-5b up to 400 V rated value":"95 A","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 160 A (690 V, 100 kA), aM: 100 A (690 V, 100 kA), BS88: 125 A (415 V, 80 kA)","Without Load Current Share Typical":"0.9 W","closing power of magnet coil at DC":"25 W","holding power of magnet coil at DC":"0.9 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)","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"6.6 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), 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":"DC","Limited To 1 S Switching At Zero Current Maximum":"1 725 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"1 297 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"946 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"610 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"486 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":"1 000 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":"50 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/7d28fa7380658c541019ac8751bc4da6.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629885&mlfb=3RT2046-1KB40-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2046-1KB40-1AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT2046-1KB40-1AA0 and get a price?","answer":"This part is sourced to order against an RFQ through independent industrial-automation distribution. Submit an RFQ for current availability and pricing — no stock count or price is published here."},{"question":"What are the key dimensions for panel layout?","answer":"The contactor measures 70 mm wide, 140 mm tall, and 152 mm deep. It requires 10 mm clearance at the side, 10 mm upward, and 10 mm downward for arc containment."},{"question":"What wire sizes does the 3RT2046-1KB40-1AA0 accept?","answer":"Solid conductors from 2.5 to 16 mm² and stranded from 6 to 70 mm². For auxiliary connections, it accepts 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²)."},{"question":"What is the closest functional alternative to 3RT2046-1KB40-1AA0?","answer":"The 3RT2036-1AC20-ZX95 is a peer in the SIRIUS contactor family but differs in frame size and coil voltage. The 3RT2046-1KB40-1AA0 is an S3 frame with a 24 VDC coil; verify the peer's frame and coil before substituting in a panel designed around this order code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2046-1KB40-1AA0","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/3RT2046-1KB40-1AA0 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}}