{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2027-2AK64-3MA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2027-2AK64-3MA0","canonicalUrl":"https://aoctrl.com/siemens/3RT2027-2AK64-3MA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2027-2AK64-3MA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT2027-2AK64-3MA0, Size S0, 45 mm width, spring-type terminals, screw and snap-on mounting on 35 mm DIN rail.","salesMarkdown":"The magnet coil uses spring-type terminals, so you're wiring the control circuit without a screwdriver — just strip, push, and pull to verify the hold. This contactor occupies 45 mm of DIN rail width, with a depth of 144 mm and height of 102 mm — that's a standard S0 footprint, so it fits alongside other SIRIUS S0 gear without surprises on the layout. The main contacts accept solid or stranded wire from 1 to 10 mm², and you can double up 2x (0.5 to 2.5 mm²) on the same terminal if you're looping through. The auxiliary contact block is not included (: No auxiliary switch), so if your circuit needs a feedback contact, you'll add a separate block on the front or side. Switching frequency depends on the duty class: at AC-1 (resistive loads) it's rated for 1,000 operations per hour maximum; at AC-3 (standard motor starting) it's 750 ops/h; at AC-4 (plugging or inching) it drops to 250 ops/h. That AC-3 ceiling of 750 cycles per hour is typical for a contactor this size — enough for a conveyor start/stop cycle every 4.8 seconds, but not for high-speed indexing. The rated operational current at 50 Hz is 0.25 A and at 60 Hz is 0.28 A, which reflects the coil draw, not the main contact rating. The contactor is rated for a 5 hp motor at 230 V, and the auxiliary contact ratings span from 6 A at 24 V down to 0.3 A at 220 V, with specific values at 48 V (2 A), 60 V (2 A), 110 V (1 A), 125 V (0.9 A), 400 V (3 A), and 440 V (0.6 A). Those are the make/break capacities for the integrated auxiliary contacts — use them for PLC inputs or relay coils, not motor loads. Mechanical endurance is typical 10 million operations, so it'll outlast most machines if the electrical load stays within the AC-3 curve. ## Where this class of part is used Power contactors like this one are the workhorses inside motor control centers, pump panels, conveyor control cabinets, and HVAC starter assemblies.","metaTitle":"Siemens 3RT2027-2AK64-3MA0 SIRIUS Power Contactor, Size S0,","metaDescription":"Siemens SIRIUS 3RT2027-2AK64-3MA0 power contactor, Size S0, 45 mm wide, spring-type terminals, screw and snap-on DIN rail mounting. Current lifecycle stage.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"144 mm","Solid":"1 ... 10 mm²","Width":"45 mm","at AC":"4 ... 16 ms","Height":"102 mm","Upwards":"10 mm","Forwards":"10 mm","Stranded":"1 ... 10 mm²","at 50 Hz":"0.25","at 60 Hz":"0.28","Downwards":"10 mm","Arcing Time":"10 ... 10 ms","At The Side":"6 mm","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Spring-type terminals","at AC-1 maximum":"1 000 1/h","at AC-2 maximum":"750 1/h","at AC-3 maximum":"750 1/h","at AC-4 maximum":"250 1/h","lifecycle_stage":"current","Auxiliary Switch":"No","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":"750 1/h","For Main Contacts":"18 ... 8","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":"S0","Solid Or Stranded":"2x (0.5 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Power contactor","at 24 V rated value":"6 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":"5 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.6 A","at 480 V rated value":"27 A","at 50 Hz rated value":"110 V","at 500 V rated value":"2 A","at 60 Hz rated value":"120 V","at 600 V rated value":"27 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Auxiliary Contacts":"20 ... 14","For Main Current Circuit":"spring-loaded terminals","at 110/120 V rated value":"2 hp","at 200/208 V rated value":"10 hp","at 220/230 V rated value":"10 hp","at 460/480 V rated value":"20 hp","at 575/600 V rated value":"25 hp","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"6 kV","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"6.3 W","at AC-2 at 400 V rated value":"15 kW","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"22 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"10/01/2009","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"44 A","at AC-5b up to 400 V rated value":"26.5 A","For Auxiliary And Control Circuit":"spring-loaded terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 50A (690V,100kA), aM: 25A (690V, 100kA), BS88: 50A (415V, 80kA)","Without Load Current Share Typical":"10.5 W","At Contactor For Auxiliary Contacts":"Spring-type terminals","With Type Of Coordination 1 Required":"gG: 125A (690V,100kA), aM: 50A (690V,100kA), BS88: 125A (415V,80kA)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"2.3 W","for AWG cables for auxiliary contacts":"2x (20 ... 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)","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":"AC","Limited To 1 S Switching At Zero Current Maximum":"499 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"341 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"260 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"199 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"162 A; Use minimum cross-section acc. to AC-1 rated value","contact rating of auxiliary contacts according to UL":"A600 / Q600","Of Main Circuit With Degree Of Pollution 3 Rated Value":"690 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":"10 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":"$62.23","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=266103&mlfb=3RT2027-2AK64-3MA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2027-2AK64-3MA0/alternatives.json"},"ai":{"faq":[{"question":"What wire sizes does the 3RT2027-2AK64-3MA0 accept?","answer":"The main contacts accept solid or stranded wire from 1 to 10 mm², and you can double up 2x (0.5 to 2.5 mm²) on the same terminal."},{"question":"What is the physical size of the 3RT2027-2AK64-3MA0?","answer":"It is 45 mm wide, 144 mm deep, and 102 mm high, fitting the standard S0 frame footprint for DIN rail mounting."},{"question":"Does the 3RT2027-2AK64-3MA0 include an auxiliary contact block?","answer":"No, the auxiliary switch is not included with this order code. An external auxiliary contact block must be added separately if needed."},{"question":"What is the maximum switching frequency for motor starting with this contactor?","answer":"At AC-3 duty (standard motor starting), the maximum switching frequency is 750 operations per hour."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2027-2AK64-3MA0","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/3RT2027-2AK64-3MA0 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}}