{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2046-1AM20-1UA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2046-1AM20-1UA0","canonicalUrl":"https://aoctrl.com/siemens/3RT2046-1AM20-1UA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2046-1AM20-1UA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, size S3, 24 V DC coil, screw-type terminals, auxiliary switch, screw and snap-on mounting on 35 mm DIN rail.","salesMarkdown":"It includes a factory-fitted auxiliary switch block, so you don't need to order a separate side-mount for basic feedback or interlock circuits. The auxiliary contact block carries a rated current of 10 A at 24 V DC, derating to 2 A at 48 V and 60 V, and further to 0.3 A at 220 V DC. This is a resistive load curve; inductive loads (relays, small solenoids) will need a flyback diode or RC snubber to stay within the contact's make/break capability. At 230 V AC the auxiliary contacts handle 6 A, and at 400 V AC they drop to 3 A. Maximum switching rates vary by duty: 900 operations per hour at AC-1 (resistive), 850 at AC-3 (squirrel-cage motor starting), and 250 at AC-4 (plugging/inching). ## Mounting and wiring considerations The contactor accepts solid conductors from 2.5 to 16 mm² on the main power terminals, and stranded conductors from 6 to 70 mm². The auxiliary terminals accept 2x (0.5 to 1.5 mm²) solid or stranded, or 2x (0.75 to 2.5 mm²). Keep the strip length consistent with screw-clamp practice — about 10 mm for the main terminals, 8 mm for auxiliaries — to avoid insulation under the clamp. That 20 mm forward clearance is the one most often missed in dense panels — the arcing space for the main contacts plus the auxiliary wiring loop needs that room. Mounting position is standing on a horizontal surface; side or inverted mounting is not specified and should be avoided. No cross-reference or alternate MPN is required while the lifecycle remains active.","metaTitle":"Siemens 3RT2046-1AM20-1UA0 SIRIUS Power Contactor, S3, 24V D","metaDescription":"Siemens SIRIUS 3RT2046-1AM20-1UA0 power contactor, size S3, 24V DC coil, screw terminals, auxiliary switch, snap-on DIN rail. Sourced to order. Request RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"152 mm","Solid":"2.5 ... 16 mm²","Width":"70 mm","at AC":"10 ... 21 ms","title":"3RT2046-1AM20-1UA0","Height":"140 mm","Upwards":"10 mm","Forwards":"20 mm","Stranded":"6 ... 70 mm²","at 50 Hz":"0.35","at 60 Hz":"0.41","Downwards":"10 mm","Arcing Time":"10 ... 20 ms","At The Side":"10 mm","description":"Contactor, AC-3, 45 kW/400 V 1 NO+1 NC, 208 V AC/50/60 Hz 3-pole, 3 NO, Size S3 Screw terminal","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 DIN rail according to DIN EN 60715","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","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":"6 A","at 400 V rated value":"3 A","at 440 V rated value":"0.8 A","at 480 V rated value":"96 A","at 50 Hz rated value":"208 V","at 500 V rated value":"2 A","at 60 Hz rated value":"208 V","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 200/208 V rated value":"25 hp","at 220/230 V rated value":"30 hp","at 460/480 V rated value":"50 hp","at 575/600 V rated value":"50 hp","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"8 kV","Safety-Related Switching On":"Yes","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)":"12/05/2017","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":"25 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)","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), 2x (18 ... 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), 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":"AC","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,"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=1093249&mlfb=3RT2046-1AM20-1UA0"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2046-1AM20-1UA0","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/3RT2046-1AM20-1UA0 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}}