{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT6027-1KF40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT6027-1KF40","canonicalUrl":"https://aoctrl.com/siemens/3RT6027-1KF40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT6027-1KF40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS coupling contactor, size S0, 110 V AC coil, screw-type terminals, 45 mm width, 107 mm depth, snap-on DIN rail mounting.","salesMarkdown":"Rated for AC-3 motor switching up to 690 V and 27.5 kW at 400 V at 60 °C, this contactor handles typical three-phase induction motor loads in the 30 kW class. The AC-3e maximum operating frequency of 750 switching cycles per hour is the practical limit for frequent starting — above that, the contactor's thermal capacity is the constraint, not the coil. For resistive (AC-1) duty the switching rate climbs to 1 000 1/h, and for demanding AC-4 (plugging/reversing) it drops to 250 1/h. The 110 V coil draws 6 A at 24 V and 1 A at 110 V, which matters when sizing the control transformer — the inrush is brief but the holding current is what the PLC output or relay must sustain. ## Mounting and physical integration At 45 mm wide, 85 mm high, and 107 mm deep, the S0 frame fits standard 45 mm-wide DIN-rail slots — side-by-side mounting is permitted, so multiple contactors can pack tightly on the rail. Screw terminals accept 2x (0.5 to 1.5 mm²) solid or stranded, or 2x (0.75 to 2.5 mm²), with AWG equivalents 2x (16 to 12) and 2x (14 to 8). The varistor surge suppressor is built in — no external snubber needed for the coil.","metaTitle":"Siemens 3RT6027-1KF40 SIRIUS coupling contactor, 110 V coil","metaDescription":"Siemens 3RT6027-1KF40 SIRIUS coupling contactor, 110 V AC coil, size S0, screw terminals, 45 mm wide, 107 mm deep. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"107 mm","Width":"45 mm","at DC":"1 500 1/h","title":"3RT6027-1KF40","Height":"85 mm","Rated Value":"110 V","description":"Power Contactor DC 77...137,5 V AC3 7.5 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":"Coupling 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 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","Design Of The Surge Suppressor":"with varistor","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":"No","With Type Of Assignment 2 Required":"gL/gG LV HRC 3NA, DIAZED 5SB, NEOZED 5SE: 35 A","closing power of magnet coil at DC":"4.5 W","holding power of magnet coil at DC":"4.5 W","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":"DC","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/ecb7827ccadf93a2713c1e2b91e2e914.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=580221&mlfb=3RT6027-1KF40"},"ai":{"faq":[{"question":"Does the 3RT6027-1KF40 have screw terminals?","answer":"Yes, both the main current circuit and the auxiliary/control circuit use screw-type terminals."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT6027-1KF40","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/3RT6027-1KF40 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}}