{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2140-4KB46-0NB3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2140-4KB46-0NB3","canonicalUrl":"https://aoctrl.com/siemens/3RA2140-4KB46-0NB3","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2140-4KB46-0NB3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2140-4KB46-0NB3 non-fused motor starter, S3 size, 75 A at 480 V, Class 10, direct starter, 3RT2 contactor, snap-on DIN rail.","salesMarkdown":"## Motor ratings and trip class The 3RA2140-4KB46-0NB3: At 400 V it delivers 37 kW. ## Mounting and panel fit Snap-mounts onto DIN rail or screws onto a backplate with the included push-in lug. Mounting position is vertical only. Dimensions are 332 mm high, 70 mm wide, 200 mm deep. Clearance: 50 mm above, 32 mm in front, 10 mm below, 10 mm at the sides, zero behind. ## Supplied components and wiring The starter ships with a 3RT2140-460NB3 contactor and a 3RA2942-1AA00 link module. The overload release is thermal bimetallic, electromechanical switching. Main contact wire range: stranded 10–70 mm², or two conductors 2.5–50 mm² each. Pollution degree 3, suitable for industrial environments with conductive dust or moisture. ## Operating conditions and lifecycle Rated for ambient operation -20 to +60 °C; storage -50 to +80 °C; transport -55 to +80 °C.","metaTitle":"Siemens 3RA2140-4KB46-0NB3 SIRIUS Motor Starter","metaDescription":"Siemens 3RA2140-4KB46-0NB3 SIRIUS non-fused motor starter, 75 A at 480 V, Class 10, S3 size. Active production, quoted to order. Request RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"200 mm","Width":"70 mm","title":"3RA2140-4KB46-0NB3","Height":"332 mm","Upwards":"50 mm","Forwards":"32 mm","Backwards":"0 mm","Downwards":"10 mm","Trip Class":"CLASS 10","At The Side":"10 mm","Rated Value":"20 ... 33 V","description":"COMBO NR STR PNL MTD S3 57-75A COMBO NR STR PNL MTD S3 57-75A","During Storage":"-50 ... +80 °C","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","During Transport":"-55 ... +80 °C","Fastening Method":"Snap-mounted to DIN rail or screw-mounted with additional push-in lug","Mounting Position":"vertical","Product Brand Name":"SIRIUS","Type Of Assignment":"2","Degree Of Pollution":"3","Product Designation":"non-fused motor starter 3RA2","Size Of Load Feeder":"S3","at 230 V rated value":"20 hp","at 400 V rated value":"37 kW","at 480 V rated value":"75 A","at 50 Hz rated value":"20 ... 33 V","at 60 Hz rated value":"20 ... 33 V","at 600 V rated value":"75 A","Design Of The Product":"direct starter","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","Of The Supplied Contactor":"3RT2140-460NB3","For Main Contacts Stranded":"10 ... 70 mm², 2x (2.5 ... 50 mm²)","Of The Supplied Link Module":"3RA2942-1AA00","Size Of The Circuit-Breaker":"S3","at AC-3 rated value maximum":"690 V","Design Of The Overload Release":"thermal (bimetallic)","Design Of The Switching Contact":"electromechanical","Operating Frequency Rated Value":"50 ... 60 Hz","at AWG cables for main contacts":"2x (10 ... 1/0), 1x (10 ... 2)","Design Of The Short-Circuit Trip":"magnetic","Of The Supplied Circuit-Breakers":"3RV2041-4KA10","Product Extension Auxiliary Switch":"Yes","holding power of magnet coil at DC":"2.7 W","Surge Voltage Resistance Rated Value":"6 kV","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","apparent holding power of magnet coil at AC":"3.5 VA","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","shock resistance according to IEC 60068-2-27":"6.7g / 5 ms","at 400 V according to IEC 60947-4-1 rated value":"65 000 A","operational current at AC-3 at 400 V rated value":"75 A","Type Of Electrical Connection For Main Current Circuit":"screw-type terminals","Mechanical Service Life (Switching Cycles) Of Contactor Typical":"10 000 000","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"975 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"57 ... 75 A","Connectable Conductor Cross-Section For Main Contacts Finely Stranded With Core End Processing":"1 ... 35 mm²"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3bacef01a2ea670ad983d3f46c8c4fc2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1343427&mlfb=3RA2140-4KB46-0NB3"},"ai":{"faq":[{"question":"What is the maximum motor power this starter handles at 480 V?","answer":"At 480 V it is rated 75 A, which corresponds to 75 hp. At 400 V it delivers 37 kW."},{"question":"What clearance is needed around this starter in the panel?","answer":"Allow 50 mm above, 32 mm in front, 10 mm below, and 10 mm at the sides. Zero clearance behind the unit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2140-4KB46-0NB3","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/3RA2140-4KB46-0NB3 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}}