{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT7027-1AC25","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT7027-1AC25","canonicalUrl":"https://aoctrl.com/siemens/3RT7027-1AC25","factsUrl":"https://aoctrl.com/api/mcp/products/3RT7027-1AC25","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT7027-1AC25, size S0 contactor, 3-pole main contacts, AC-3 rated, 24 V AC 50/60 Hz coil, screw-type terminals, IP20 finger-safe.","salesMarkdown":"It carries three normally-open main contacts (3 NO) rated for AC-3 duty up to 690 V, with a 24 V AC coil that works on both 50 Hz and 60 Hz supplies. This is the standard screw-terminal variant — no auxiliary contacts built in, but the design accepts add-on auxiliary switch blocks when you need them. The 690 V maximum operating voltage means it's fine on 400 V and 480 V systems, and the insulation voltage is also rated at 690 V (pollution degree 3), so it's suited for industrial environments where conductive dust or condensation is present. The coil holds at 24 V AC nominal, with a closing power draw of 0.72 W and a holding power of just 0.24 W — that's low enough to keep the control transformer small and the heat inside the panel manageable. Mechanical life is solid: the contactor is rated for 800 switching operations per hour at AC-3 maximum, and 250 per hour at AC-4 (plugging/inching duty). That's typical for a size S0 — it'll handle a conveyor start-stop cycle all day, but don't hammer it with reversing starts every few seconds without checking the thermal curve. ## Installation notes from the field They accept 2x (0.5 to 1.5 mm²) solid or stranded, or 2x (0.75 to 2.5 mm²) with ferrules. That's enough for standard motor leads up to about 2.5 mm² — if you're running larger cable, step up to the next frame size or use a terminal block in between. That helps when you're squeezing it into a crowded panel or aligning it with existing busbars. The operating temperature range is -10 to +55 °C, storage from -25 to +70 °C — fine for most indoor panel environments.","metaTitle":"Siemens 3RT7027-1AC25 SIRIUS Contactor, 3-pole AC-3, 24V 50/","metaDescription":"Siemens 3RT7027-1AC25 SIRIUS contactor, size S0, 3-pole main contacts, 24V AC 50/60Hz coil. Screw terminals, IP20. Current production. Sourced to order via RFQ.","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 standard mounting rail according to DIN EN 50022","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":"24 V","at 60 Hz rated value":"24 V","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","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","operating voltage at AC-3 rated value maximum":"690 V","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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1533985&mlfb=3RT7027-1AC25","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT7027-1AC25/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for this contactor?","answer":"It is a 3-pole size S0 contactor with a 24 V AC coil (50/60 Hz), rated for AC-3 motor switching up to 690 V. The insulation voltage is 690 V, pollution degree 3, and it has IP20 finger-safe protection on the front and terminals."},{"question":"What is the mounting method for this contactor?","answer":"It uses screw and snap-on mounting onto a 35 mm standard mounting rail per DIN EN 50022. Side-by-side mounting is allowed, and the mounting position can be rotated ±180° on a vertical surface or tilted ±22.5°."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT7027-1AC25","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/3RT7027-1AC25 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}}