{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1045-1AK60","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1045-1AK60","canonicalUrl":"https://aoctrl.com/siemens/3RT1045-1AK60","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1045-1AK60","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S3 power contactor, 3RT1045-1AK60, 45 kW at 500 V, screw-type terminals, snap-on mounting on 35/75 mm rail.","salesMarkdown":"## SIRIUS S3 power contactor — 3RT1045-1AK60 The Siemens 3RT1045-1AK60 is a SIRIUS S3 power contactor rated for motor loads up to 45 kW at 500 V, with a mechanical life of 10 million operations typical. Screw-type terminals on the main circuit accept solid conductors from 2x (0.5... 1.5 mm²) up to max. 2x (0.75... 4 mm²) and stranded up to 2x (10... 50 mm²). IP20 on the front with a cover or box terminal; the terminal body itself is IP00. ## Rated for the load — what the ratings mean The 45 kW at 500 V figure is the AC-3 motor-switching rating — the one that matters for starting and stopping a standard induction motor. For resistive loads (AC-1) the switching frequency rises to 900 operations per hour; for AC-4 (plugging/inching) it drops to 300/h. The coil holds at 24 VDC, rated 10 A, and drops out cleanly within 10 to 25 ms at AC — no delayed dropout on undervoltage. ## Panel integration — footprint and wiring The contactor measures 146 mm high, 70 mm wide, 139 mm deep — size S3. Screw terminals accept solid or stranded conductors: solid up to 2x (0.75... 4 mm²) per clamp, stranded up to 2x (10... 50 mm²). The auxiliary contact block (not included) shares the same screw-terminal pitch; verify the free-wheel diode polarity on any DC coil suppression circuit before energizing.","metaTitle":"Siemens 3RT1045-1AK60 SIRIUS Power Contactor, 45 kW at 500 V","metaDescription":"Siemens 3RT1045-1AK60 SIRIUS S3 power contactor, 45 kW at 500 V, screw terminals, snap-on 35/75 mm rail. Active lifecycle. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"139 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"70 mm","at AC":"10 ... 25 ms","Height":"146 mm","Stranded":"2x (10 ... 50 mm²)","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.8 ... 1.1","Arcing Time":"10 ... 15 ms","On The Front":"IP20; IP20 on the front with cover / box terminal","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","During Storage":"-55 ... +80 °C","Of The Terminal":"IP00","at AC-1 maximum":"900 1/h","at AC-2 maximum":"400 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","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":"10 A","at 60 V rated value":"2 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":"110 V","at 500 V rated value":"45 kW","at 60 Hz rated value":"120 V","at 690 V rated value":"21.1 kW","Side-By-Side Mounting":"Yes","at 1000 V rated value":"37 W","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"37 kW","at AC-4 at 400 V rated value":"66 A","Substance Prohibitance (Date)":"05/01/2012","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 690 V at 60 °C rated value":"114 kW","at 1000 V at 60 °C rated value":"82 W","at AWG cables for main contacts":"2x (10 ... 1/0)","For Auxiliary And Control Circuit":"screw-type terminals","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","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)","Thermal Short-Time Current Limited To 10 S":"760 A","Finely Stranded Without Core End Processing":"2x (10 ... 35 mm²)","apparent holding power of magnet coil at AC":"21 VA","apparent pick-up power of magnet coil at AC":"300 VA","Type Of Voltage Of The Control Supply Voltage":"AC","Required Spacing For Grounded Parts At The Side":"6 mm","contact rating of auxiliary contacts according to UL":"A600 / Q600","Inductive Power Factor With Closing Power Of The Coil":"0.52","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.29","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","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$644.97","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=266992&mlfb=3RT1045-1AK60","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1045-1AK60/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RT1045-1AK60?","answer":"Submit an RFQ — we source this part to order and confirm both availability and current pricing at quote time. No stock figures or price lists are published here."},{"question":"What is the difference between 3RT1045-1AK60 and 3RT5045-1AF00?","answer":"The 3RT5045-1AF00 is a different series (SIRIUS 3RT5) with a different coil voltage and possibly different auxiliary contact configuration. The 3RT1045-1AK60 uses a 24 VDC coil rated 10 A; the 3RT5045-1AF00 would need its own coil specs verified. Footprint and mounting rail are the same 35/75 mm standard, but always check the terminal layout before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1045-1AK60","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/3RT1045-1AK60 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}}