{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2027-1AN20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2027-1AN20","canonicalUrl":"https://aoctrl.com/siemens/3RT2027-1AN20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2027-1AN20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2027-1AN20 power contactor, S0 frame, 24 VDC screw-type coil, 45 mm width, screw and snap-on DIN rail mount.","salesMarkdown":"The 3RT2027-1AN20: This is a SIRIUS S0-frame power contactor — the S0 frame is the compact workhorse for motor loads up to roughly 7.5 kW at 400 V AC-3. The 45 mm width and 85 mm height fit standard 35 mm DIN rail (DIN EN 60715) with screw and snap-on fastening, so it occupies one 45 mm module in a panel. The main contact wiring accepts 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded. The auxiliary switch is included (screw-type terminals). ## S0 Frame — What It Carries The S0 frame size tells you the physical envelope and the current range this contactor is built for. It is the smallest of the SIRIUS contactor frames (S0, S2, S3, S6, S10, S12), sized for motor currents up to about 16 A AC-3 at 400 V. That makes it a direct fit for small motor starters, pump panels, and conveyor drives in the 4–7.5 kW band. The 45 mm width means three of these fit in a standard 140 mm DIN-rail segment, leaving room for an overload relay alongside.","metaTitle":"Siemens 3RT2027-1AN20 SIRIUS Power Contactor, S0 Frame, 24 V","metaDescription":"Siemens 3RT2027-1AN20 SIRIUS power contactor, S0 frame size, 24 VDC screw-type coil, rated 10 A at 24 V. Active production. DIN rail mount. RFQ for volume.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"97 mm","Solid":"1 ... 10 mm²","Width":"45 mm","at AC":"4 ... 16 ms","Height":"85 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":"Screw-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":"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":"750 1/h","For Main Contacts":"16 ... 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 ... 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":"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":"220 V","at 500 V rated value":"2 A","at 60 Hz rated value":"220 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":"screw-type 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-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":"screw-type 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":"Screw-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 ... 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":"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 / P600","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":"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":"$54.61","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=516964&mlfb=3RT2027-1AN20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2027-1AN20/alternatives.json"},"ai":{"faq":[{"question":"What is the closest alternative to this contactor within the SIRIUS family?","answer":"Within the S0 frame, the closest sibling would be a variant with a different coil voltage (e.g., 110 VAC, 230 VAC) or a different terminal style (spring-cage vs screw). The 3RT2027-1AN20 is the 24 VDC screw-type coil version. If you need a 24 VDC coil but prefer spring-cage terminals, the corresponding order code would differ by the terminal designator in the Siemens numbering scheme. For a direct AC coil replacement, look at the 3RT2026 or 3RT2025 series in the same S0 frame."},{"question":"What compliance documentation is available for this part?","answer":"As a Siemens SIRIUS product, the 3RT2027-1AN20 carries CE marking for the European market and is designed to meet IEC/EN 60947-4-1. RoHS and REACH declarations are standard from Siemens for this series. UL and CSA listings are typical for SIRIUS contactors, but verify the specific file number against your jurisdiction."},{"question":"What is the depth of this contactor?","answer":"The depth is 97 mm, measured from the DIN-rail mounting surface to the furthest projection (typically the coil terminals or arc chamber). This fits standard 100 mm deep enclosures with a few mm to spare."},{"question":"What wire sizes does the main contact accept?","answer":"Solid or stranded wire from 1 to 10 mm². For dual-wire termination, it accepts 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²). The coil terminals are screw-type, same wire range."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2027-1AN20","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/3RT2027-1AN20 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}}