{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT7027-1AH20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT7027-1AH20","canonicalUrl":"https://aoctrl.com/siemens/3RT7027-1AH20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT7027-1AH20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT7027-1AH20, size S0 contactor, 3-pole main contacts (3 NO), screw-type terminals, AC control supply voltage, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"The screw-type terminals on both main and auxiliary circuits are standard for panel wiring, accepting 2x (0.5 to 2.5 mm²) solid or stranded conductors. The AC-3 rated operational voltage maximum is 690 V, meaning this contactor is sized for 400 V or 480 V motor circuits with headroom, but also covers 690 V applications common in mining or heavy industrial installations. For auxiliary contact reliability, the part is specified as acceptable for PLC control at 17 V, 5 mA — a key detail when driving the contactor coil from a 24 VDC PLC output via an interface relay, ensuring the low-energy signal doesn't miss a pickup. The AC coil's holding power is 0.24 W DC, with closing power at 0.72 W DC. Mechanical endurance is supported by a maximum switching rate of 800 operations per hour at AC-3 and 250 per hour at AC-4. The contactor is rated for shock resistance of 12.5g at 5 ms and 7.8g at 10 ms sine pulse.","metaTitle":"Siemens 3RT7027-1AH20 SIRIUS Contactor, 3-Pole, AC Coil, Siz","metaDescription":"Siemens 3RT7027-1AH20 SIRIUS contactor, size S0, 3-pole, AC coil. Rated AC-3 max 690 V. Screw terminals, snap-on DIN rail mount. Current lifecycle stage. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"91 mm","Width":"45 mm","Height":"85.5 mm","at 50 Hz":"0.24","at 60 Hz":"0.24","On The Front":"IP20","During Storage":"-25 ... +70 °C","Of The Terminal":"IP20","at AC-3 maximum":"800 1/h","at AC-4 maximum":"250 1/h","lifecycle_stage":"current","During Operation":"-10 ... +55 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","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)","Degree Of Pollution":"3","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 50 Hz rated value":"48 V","at 60 Hz rated value":"48 V","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","Insulation Voltage Rated Value":"690 V","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"Yes","With Type Of Assignment 2 Required":"gL/gG NH 3NA: 50 A","closing power of magnet coil at DC":"0.72 W","holding power of magnet coil at DC":"0.24 W","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"gL/gG NH 3NA: 125 A","shock resistance with sine pulse at AC":"12.5g / 5 ms, 7.8g / 10 ms","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":"acceptability for PLC control (17 V, 5 mA)","Type Of Voltage Of The Control Supply Voltage":"AC","operating voltage at AC-3 rated value maximum":"690 V","operational current at DC-13 at 220 V rated value":"0.3 A","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Required Spacing With Side-By-Side Mounting At The Side":"0 mm","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","Connectable Conductor Cross-Section For Main Contacts Finely Stranded With Core End Processing":"6 mm²","Connectable Conductor Cross-Section For Auxiliary Contacts Finely Stranded With Core End Processing":"0.5 ... 2.5 mm²"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8fda9e8cdd4e5df578e2b8c28aec601b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1533999&mlfb=3RT7027-1AH20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT7027-1AH20/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to 3RT7027-1AH20?","answer":"The 3RT6018-1AB02 is a peer from the same SIRIUS family, but it is a different size and rating class. The 3RT7027-1AH20 is a size S0 contactor with an AC coil and screw terminals, while the 3RT6018-1AB02 is a different variant. Verify the specific ratings (coil voltage, pole count, terminal type) against your BOM before substituting."},{"question":"Where can I buy 3RT7027-1AH20 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at the time of quote — submit an RFQ for a firm price and lead time."},{"question":"Will 3RT7027-1AH20 drop into a panel specified around 3RT6018-1AB02 without rewiring?","answer":"Not without checking. Both are SIRIUS contactors, but the 3RT7027-1AH20 is size S0 with screw terminals and an AC coil, while the 3RT6018-1AB02 is a different variant. Compare the terminal layout, coil voltage, and mounting footprint against your existing panel wiring before assuming a direct swap."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT7027-1AH20","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/3RT7027-1AH20 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}}