{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT5045-1AG00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT5045-1AG00","canonicalUrl":"https://aoctrl.com/siemens/3RT5045-1AG00","factsUrl":"https://aoctrl.com/api/mcp/products/3RT5045-1AG00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S3, order code 3RT5045-1AG00, rated 21.1 kW at 690 V, screw-type terminals, snap-on mounting.","salesMarkdown":"The Siemens 3RT5045-1AG00 is a SIRIUS power contactor in size S3, rated for motor loads up to 21.1 kW at 690 V. The 1 000 V insulation voltage and 6 kV rated surge voltage put it in the IEC 60947-4-1 class for industrial motor switching. At 690 V it handles 21.1 kW; at 400 V and 60 °C ambient it's rated 66 kW — the thermal derate from 40 °C to 60 °C drops the minimum permissible conductor from 50 mm² to 35 mm². The AC-3 maximum switching rate is 1 000 operations per hour; AC-4 (plugging/inching) drops to 300 1/h. Coil draws 6 A at 24 V, 1 A at 110 V, 0.3 A at 220 V — match your control transformer accordingly. Mounts on 35 mm or 75 mm standard DIN rail with screw and snap-on. Side-by-side mounting is allowed. Wire range for main contacts: 2x (2.5 to 16 mm²) solid/stranded or 2x (10 to 1/0 AWG). Auxiliary switch extension is available as a product extension.","metaTitle":"Siemens 3RT5045-1AG00 SIRIUS Power Contactor, S3, 690V 21.1k","metaDescription":"Siemens 3RT5045-1AG00 SIRIUS power contactor, size S3, rated 21.1 kW at 690 V. Screw terminals, snap-on DIN rail mount. Current lifecycle. Available to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"139 mm","Width":"70 mm","at AC":"5 000 1/h","Height":"146 mm","at 50 Hz":"0.27","During Storage":"-55 ... +80 °C","at AC-1 maximum":"900 1/h","at AC-3 maximum":"1 000 1/h","at AC-4 maximum":"300 1/h","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm and 75 mm standard mounting rail","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 (2.5 ... 16 mm²)","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"Power contactor","at 24 V rated value":"6 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.3 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 50 Hz rated value":"36 V","at 690 V rated value":"21.1 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","Substance Prohibitance (Date)":"03/01/2017","at 40 °C minimum permissible":"50 mm²","at 60 °C minimum permissible":"35 mm²","Insulation Voltage Rated Value":"1 000 V","at 230 V at 60 °C rated value":"38 kW","at 400 V at 60 °C rated value":"66 kW","at 690 V at 60 °C rated value":"114 kW","at AWG cables for main contacts":"2x (10 ... 1/0)","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"Yes","With Type Of Assignment 2 Required":"fuse gL/gG: 160 A","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"fuse gL/gG: 250 A","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","number of NC contacts for main contacts":"0","number of NO contacts for main contacts":"3","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)","at ambient temperature 40 °C rated value":"120 A","at ambient temperature 60 °C rated value":"100 A","Finely Stranded Without Core End Processing":"2x (10 ... 35 mm²)","Type Of Voltage Of The Control Supply Voltage":"AC","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","number of NC contacts for auxiliary contacts instantaneous contact":"0","number of NO contacts for auxiliary contacts instantaneous contact":"0"}},"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=580029&mlfb=3RT5045-1AG00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT5045-1AG00/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RT5045-1AG00?","answer":"The 3RT5045-1AC20 is a peer in the same SIRIUS S3 frame with similar ratings; verify coil voltage and auxiliary configuration against your BOM before substituting."},{"question":"What are the key dimensions of 3RT5045-1AG00?","answer":"Depth is 139 mm, width is 70 mm, height is 146 mm. These fit the standard S3 contactor footprint on DIN rail."},{"question":"What compliance documentation does Siemens provide for 3RT5045-1AG00?","answer":"RoHS compliance date is March 1, 2017. The part carries a 1 000 V insulation voltage rating and 6 kV surge voltage, consistent with IEC 60947-4-1. Pollution degree 3 is specified for industrial environments."},{"question":"Where can I buy 3RT5045-1AG00?","answer":"This part is available to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT5045-1AG00","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/3RT5045-1AG00 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}}