{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT7027-1AF05","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT7027-1AF05","canonicalUrl":"https://aoctrl.com/siemens/3RT7027-1AF05","factsUrl":"https://aoctrl.com/api/mcp/products/3RT7027-1AF05","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT7027-1AF05, size S0 3-pole contactor, 690 V AC-3/AC-3e rated maximum, 3 NO main contacts, screw-type terminals for main and control circuits, IP20 front and terminal protection, screw and snap-on mounting on 35 mm DIN rail.","salesMarkdown":"The 3RT7027-1AF05 is a size S0 contactor from the Siemens SIRIUS family, rated for AC-3 and AC-3e duty up to 690 V maximum. The 3 NO main contacts handle motor switching in the S0 frame, which is the standard footprint for 15–30 A motor loads in European panel builds. The AC-3 maximum switching rate of 800 operations per hour sets the thermal cycling limit for repetitive starting; the AC-4 rate of 250/h applies when plugging or inching is part of the duty cycle — exceed that and the contactor will overheat before the overload relay trips. Screw-type terminals on both main and control circuits mean this is the version for panel shops that prefer screw clamps over spring-cage; the terminal accepts 2x (0.5…1.5 mm²) solid or 2x (0.75…2.5 mm²) stranded, so it covers the common motor control wiring sizes without adapters. The auxiliary contact reliability is specified for PLC-level control (17 V, 5 mA), meaning the silver-alloy contacts are designed to switch dry logic signals without needing a separate interface relay. That saves a DIN-rail slot in panels where the PLC output directly commands the contactor coil. Side-by-side mounting is permitted with no derating gap, which is the usual SIRIUS S0 arrangement for multi-contactor motor starter groups. The product extension for auxiliary switches is supported, so a side-mount auxiliary contact block can be added later without replacing the contactor. That is useful when a BOM revision adds a feedback signal to the PLC after the initial build. Fuse coordination is specified for both type 1 and type 2.","metaTitle":"Siemens 3RT7027-1AF05 S0 Contactor, 3-Pole, 690V AC-3, Screw","metaDescription":"Siemens 3RT7027-1AF05 size S0 contactor, 3-pole, 690V AC-3 max, 3 NO main contacts, screw terminals, IP20, DIN rail mount. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"91 mm","Width":"55 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 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":"0.82 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":"1","number of NO contacts for auxiliary contacts instantaneous contact":"1","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/0481b9dfedfecfb2b5481fd175539c08.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1533988&mlfb=3RT7027-1AF05","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT7027-1AF05/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RT7027-1AF05?","answer":"Submit an RFQ through this listing. The part is sourced to order against an RFQ; availability and current pricing are confirmed at quote time through independent distribution channels."},{"question":"What is the closest functional second-source to 3RT7027-1AF05?","answer":"The 3RT6026-1AN20 is a size S0 contactor from the same SIRIUS family, but it uses spring-cage terminals instead of screw-type. The 3RT7027-1AF05 has screw terminals on both main and control circuits, so swapping to a spring-cage variant may require terminal adapter changes in the panel wiring schedule."},{"question":"Will 3RT7027-1AF05 drop into a panel specified around 3RT6026-1AN20 without rewiring?","answer":"The 3RT7027-1AF05 uses screw-type terminals while the 3RT6026-1AN20 uses spring-cage terminals. Both are size S0 with the same DIN-rail footprint and mounting hole pattern, so the mechanical fit is identical. However, the terminal type difference means the wiring method changes — screw terminals require a screwdriver for termination, spring-cage does not. If the panel was wired for spring-cage, the screw terminals will accept the same wire sizes (2x 0.5…1.5 mm² solid or 2x 0.75…2.5 mm² stranded), but the termination tooling and torque specification differ."},{"question":"What compliance documentation does Siemens provide for 3RT7027-1AF05?","answer":"Siemens provides the standard IEC 60947-4-1 compliance documentation for this contactor series, including the datasheet with rated operational voltages, currents, and coordination data. Specific RoHS, REACH, and UL documentation should be requested at quote time as they vary by manufacturing batch and destination."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT7027-1AF05","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/3RT7027-1AF05 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}}