{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT7027-1AG20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT7027-1AG20","canonicalUrl":"https://aoctrl.com/siemens/3RT7027-1AG20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT7027-1AG20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT7027-1AG20, size S0 3-pole contactor, 690 V rated insulation voltage, screw-type terminals for main and control circuits, IP20 front and terminal protection.","salesMarkdown":"The Siemens 3RT7027-1AG20 is a size S0 3-pole contactor from the SIRIUS family, rated for main circuit insulation voltage up to 690 V. It uses screw-type terminals on both the main and auxiliary/control circuits, so it's a direct fit for existing panel wiring practices that prefer screw clamping over spring-cage. The auxiliary contact block is field-addable. Auxiliary contact ratings at 230 V are 6 A, at 400 V are 3 A, and at 690 V are 1 A — these are the continuous current limits for the built-in auxiliary contacts, not the main poles. The coil holding power is only 0.24 W DC, which keeps the control transformer load low in a multi-contactor panel. The front and terminal areas are both IP20 — finger-safe but not protected against water ingress, so it belongs inside a rated enclosure. For short-circuit coordination, with type 2 coordination required, use a gL/gG NH 3NA 50 A fuse; with type 1 coordination, a 125 A fuse. This matters when sizing upstream protection to avoid contactor damage during a fault. ## Integration notes Dimensions are 91 mm deep, 45 mm wide, 85.5 mm tall — the S0 footprint. The 45 mm width means it occupies two 22.5 mm module spaces on the DIN rail, standard for this frame size. The shock resistance is 12.5g for 5 ms and 7.8g for 10 ms sine pulse — robust enough for most industrial panel environments. Wire sizes accepted: 2x (0.5 to 1.5 mm²) solid/stranded and 2x (0.75 to 2.5 mm²) with ferrule, for both main and control circuits. The screw terminals are standard for North American and European panel builds.","metaTitle":"Siemens 3RT7027-1AG20 SIRIUS Contactor, 3-Pole, 690 V, Screw","metaDescription":"Siemens 3RT7027-1AG20 SIRIUS contactor, size S0, 3-pole, 690 V rated insulation, screw terminals, IP20, active production. Sourced to order against RFQ.","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 DIN rail according to DIN EN 50022","at AC-3e maximum":"800 1/h","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":"110 V","at 60 Hz rated value":"110 V","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-3 rated value maximum":"690 V","at AC-3e rated value maximum":"690 V","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","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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1533993&mlfb=3RT7027-1AG20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT7027-1AG20/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to 3RT7027-1AG20?","answer":"The 3RT6026-1AN20 is a size S0 contactor from the same SIRIUS family, but it uses spring-cage terminals instead of screw terminals. Verify terminal type and auxiliary contact configuration before substituting — the mounting footprint and main pole ratings are similar."},{"question":"Will 3RT7027-1AG20 drop into a panel specified around 3RT6026-1AN20 without rewiring?","answer":"Both are size S0 and mount on 35 mm DIN rail with the same footprint, so mechanical fit is the same. The key difference is terminal type: 3RT7027-1AG20 uses screw terminals, while 3RT6026-1AN20 uses spring-cage. If the panel is wired for spring-cage, you may need to change terminal adapters or re-terminate."},{"question":"What compliance documentation does Siemens provide for 3RT7027-1AG20?","answer":"The part carries IP20 front and terminal protection. For specific RoHS, REACH, UL, or IEC declarations, request the manufacturer's compliance documentation at quote time — the evidence does not list these certs directly."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT7027-1AG20","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/3RT7027-1AG20 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}}