{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT6027-1AD20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT6027-1AD20","canonicalUrl":"https://aoctrl.com/siemens/3RT6027-1AD20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT6027-1AD20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S0 power contactor, 3RT6027-1AD20, screw-type terminals, 45 mm width, rated 27.5 kW at 400 V AC-3, snap-on 35 mm DIN rail mounting.","salesMarkdown":"## Mounting and integration — what fits where The 45 mm width (S0 frame) is a standard slot — three of these side-by-side take 135 mm, which fits a typical 200 mm wide enclosure gland plate. The screw terminals on the main circuit accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded wire — common for control wiring up to the 10 mm² minimum permissible at 40 °C for the power circuit. The built-in auxiliary contact block is rated 6 A at 24 V, 10 A at 230 V, and 3 A at 400 V — so for a 24 VDC PLC output driving the coil, you're good for 6 A, which covers most pilot-duty solenoids and contactor coils. The 690 V rated insulation voltage matches the main circuit, so the aux contacts share the same isolation class as the power path. ## Switching frequency and mechanical life — route-duty expectations For AC-3 motor switching (the common case), the maximum is 750 operations per hour; AC-4 (plugging/inching) drops to 250 per hour. If your application cycles a conveyor motor every 10 seconds, that's 360 per hour — within the AC-3 limit. The 5,000 operations per hour at AC rating is the no-load mechanical maximum, so don't plan on switching a motor that fast.","metaTitle":"Siemens 3RT6027-1AD20 SIRIUS S0 Power Contactor, 27.5 kW at","metaDescription":"Siemens 3RT6027-1AD20 SIRIUS S0 power contactor. 27.5 kW motor rating at 400 V AC-3. 45 mm wide, screw terminals, snap-on DIN rail. Current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"97 mm","Width":"45 mm","at AC":"5 000 1/h","title":"3RT6027-1AD20","Height":"85 mm","at 50 Hz":"0.25","at 60 Hz":"0.28","description":"Contactor AC 42 V 50/60 HZ AC3 15 kW 400 V AUX contacts 1 NO +1 NC 3-pole, size S0 screw terminal","During Storage":"-55 ... +80 °C","at AC-1 maximum":"1 000 1/h","at AC-3 maximum":"750 1/h","at AC-4 maximum":"250 1/h","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 50022","at AC-3e maximum":"750 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)","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"Power contactor","at 24 V rated value":"6 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.3 A","at 230 V rated value":"10 A","at 400 V rated value":"3 A","at 50 Hz rated value":"42 V","at 60 Hz rated value":"42 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","Substance Prohibitance (Date)":"05/01/2012","at 40 °C minimum permissible":"10 mm²","at 60 °C minimum permissible":"10 mm²","Insulation Voltage Rated Value":"690 V","at 230 V at 60 °C rated value":"15.5 kW","at 400 V at 60 °C rated value":"27.5 kW","at 690 V at 60 °C rated value":"47.5 kW","for AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 8)","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"Yes","With Type Of Assignment 2 Required":"gL/gG LV HRC 3NA, DIAZED 5SB, NEOZED 5SE: 35 A","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"gL/gG LV HRC 3NA, DIAZED 5SB, NEOZED 5SE: 100 A","operational current at AC-12 maximum":"10 A","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","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":"1 faulty switching per 100 million (17 V, 1 mA)","at ambient temperature 40 °C rated value":"50 A","at ambient temperature 60 °C rated value":"42 A","Type Of Voltage Of The Control Supply Voltage":"AC","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Required Spacing With Side-By-Side Mounting At The Side":"0 mm","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","number of NC contacts for auxiliary contacts instantaneous contact":"1","number of NO contacts for auxiliary contacts instantaneous contact":"1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0c7920fe9f4d0980a4c31518bce112ef.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=723085&mlfb=3RT6027-1AD20"},"ai":{"faq":[{"question":"Where can I buy 3RT6027-1AD20?","answer":"The 3RT6027-1AD20 is sourced to order through independent distribution channels. Availability and current pricing are confirmed at quote time against an RFQ — submit one to get a firm commitment."},{"question":"What is 3RT6027-1AD20's width and depth for panel layout?","answer":"The width is 45 mm (S0 frame) and the depth is 97 mm, with a height of 85 mm. The 45 mm width is the critical dimension for DIN-rail fill — three units side-by-side occupy 135 mm."},{"question":"Will 3RT6027-1AD20 drop into a panel designed for 3RT6028-1AB00 without rewiring?","answer":"Both are S0-frame contactors with the same 45 mm width and screw-type terminals, so the physical footprint and terminal layout are the same. The 3RT6028-1AB00 is a higher-current variant (typically 32 A vs 27.5 kW at 400 V for this one), so the wiring gauge may differ for the main circuit, but the panel cutout and DIN-rail position are identical."},{"question":"What compliance documentation does Siemens provide for 3RT6027-1AD20?","answer":"The part carries a substance prohibitance date of 05/01/2012, indicating RoHS and REACH compliance. The rated insulation voltage of 690 V and pollution degree 3 support IEC 60947-4-1 certification for industrial control panels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT6027-1AD20","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/3RT6027-1AD20 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}