{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2046-3KB44-3MA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2046-3KB44-3MA0","canonicalUrl":"https://aoctrl.com/siemens/3RT2046-3KB44-3MA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2046-3KB44-3MA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2046-3KB44-3MA0 coupling contactor, size S3, 24 VDC coil, spring-type terminals, screw and snap-on 35 mm DIN rail mounting, 140 x 70 x 152 mm.","salesMarkdown":"The Siemens 3RT2046-3KB44-3MA0 is a SIRIUS coupling contactor in size S3, designed to switch loads in control panels via a 24 VDC coil. The spring-type terminals on the coil accept solid conductors 2.5 to 16 mm² and stranded up to 70 mm² — no tool needed for the control wiring, which speeds up panel build and eliminates screw torque variation. Rated auxiliary switching capacity at 24 V is 10 A, dropping to 2 A at 48 V and 60 V, 1 A at 110 V, and 0.3 A at 220 V — so the same auxiliary contact block handles mixed-voltage control circuits without derating surprises. It mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715, and the mounting position is flexible: +/-180° rotation on a vertical surface, plus +/-22.5° tilt forward/backward. That means it fits into tight enclosures or odd-angle subpanels without forced air routing. ## Clearance and integration The contactor body is 140 mm high, 70 mm wide, 152 mm deep. Main contacts: 2 normally open (NO). Auxiliary contacts are present, and the auxiliary wiring accepts 2x (0.5 to 2.5 mm²) solid or stranded. ## Switching performance and environmental limits Maximum switching frequencies: 900 cycles/hour at AC-1 (resistive), 850 at AC-3 and AC-3e (squirrel-cage motors), 350 at AC-2 (slip-ring motors), and 250 at AC-4 (plugging/inching). Coil inrush peaks at 2.7 A; dropout delay on DC is 38 to 57 ms. Shock resistance: 16.3 g for 5 ms (AC) and 10 g for 10 ms. Coil pickup threshold: initial value 0.8 (80% of rated voltage), full-scale value 1.2 (120%) — so it pulls in reliably down to 19.2 VDC and holds through transients up to 28.8 VDC.","metaTitle":"Siemens 3RT2046-3KB44-3MA0 SIRIUS Coupling Contactor, S3, 24","metaDescription":"Siemens SIRIUS 3RT2046-3KB44-3MA0 coupling contactor, size S3, 24 VDC coil, spring-type terminals, screw/snap-on 35 mm DIN rail. Active production. Sourced to order.","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":"16.3g / 5 ms, 10.g / 10 ms","at DC":"38 ... 57 ms","title":"3RT2046-3KB44-3MA0","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","description":"COUPL. CONT.,AC3:45KW/400V, 2NO+2NC, 24 V DC, 3-POLE, 3NO, SIZE: S3, SCREW TERMINALS, 1NO+1NC, VARISTOR INTEGR., PERM. MOUNT. AUX. SWITCH, SUITABLE FOR 2A PLC-OUTPUTS","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Spring-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 DIN 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":"+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface","Size Of Contactor":"S3","Solid Or Stranded":"2x (0.5 ... 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)":"09/06/2017","Design Of The Surge Suppressor":"with varistor","Duration Of Inrush Current Peak":"50 µs","Locked-Rotor Current Mean Value":"0.9 A","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":"spring-loaded 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":"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":"6.6 W","for AWG cables for auxiliary contacts":"2x (20 ... 16)","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":"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":"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,"stockQuantity":0,"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=1075480&mlfb=3RT2046-3KB44-3MA0"},"ai":{"faq":[{"question":"What is the depth of this contactor?","answer":"152 mm."},{"question":"What solid conductor range does the coil terminal accept?","answer":"2.5 to 16 mm² solid."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2046-3KB44-3MA0","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/3RT2046-3KB44-3MA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}