{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT7027-1AL20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT7027-1AL20","canonicalUrl":"https://aoctrl.com/siemens/3RT7027-1AL20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT7027-1AL20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS Size S0 contactor, 3RT7027-1AL20, 3-pole, 690 V AC-3 rated, screw-type terminals, IP20, snap-on 35 mm DIN rail.","salesMarkdown":"The Siemens 3RT7027-1AL20 is a Size S0 3-pole contactor from the SIRUS series, rated for AC-3 and AC-3e duty up to 690 V. The AC-3 rated operational current is 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V — these are the motor-switching currents you size the contactor for, not the resistive (AC-1) rating. The maximum switching frequency is 800 operations per hour under AC-3 duty and 250/h under AC-4 (plugging/inching), so it handles moderate-speed cycling but isn't for high-frequency servo or reversing applications. Coil power draw is 0.72 W during closing and 0.24 W holding. Pollution degree 3. Dimensions are 45 mm wide, 85.5 mm high, 91 mm deep — fits standard S0 footprint. ## Protection coordination and wiring For type 2 coordination, use gL/gG NH 3NA fuses rated 50 A. For type 1 coordination, use 125 A fuses.","metaTitle":"Siemens 3RT7027-1AL20 SIRIUS Contactor, Size S0, 3-pole, 690","metaDescription":"Siemens 3RT7027-1AL20 SIRIUS contactor, Size S0, 3-pole, 690 V AC-3 rated, IP20, screw terminals, snap-on DIN rail. Active production, sourced to order. Request quote.","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":"230 V","at 60 Hz rated value":"230 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=1534002&mlfb=3RT7027-1AL20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT7027-1AL20/alternatives.json"},"ai":{"faq":[{"question":"What is the depth and width of 3RT7027-1AL20?","answer":"Depth is 91 mm, width is 45 mm, height is 85.5 mm — standard Size S0 footprint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT7027-1AL20","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/3RT7027-1AL20 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}}