{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT7027-1AB05","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT7027-1AB05","canonicalUrl":"https://aoctrl.com/siemens/3RT7027-1AB05","factsUrl":"https://aoctrl.com/api/mcp/products/3RT7027-1AB05","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT7027-1AB05, Size S0 contactor, 3-pole, 24 VAC 50/60 Hz coil, screw-type terminals, IP20 front and terminal protection.","salesMarkdown":"## Siemens SIRIUS 3RT7027-1AB05 — Size S0 Contactor, 24 VAC Coil The front and terminal areas carry IP20 protection, suitable for enclosed panel installations where finger-safe access is required. Coil power draw is 0.82 W on closing and 0.24 W holding at DC, making it compatible with standard 24 V control transformers and PLC outputs without excessive inrush burden. The Size S0 footprint (55 mm wide, 85.5 mm high, 91 mm deep) fits standard panel layouts; side-by-side mounting is permitted without derating gaps. Ambient operating range is -10 to +55 °C; storage range -25 to +70 °C. Screw terminals accept 2x (0.5…1.5 mm²) solid or stranded, or 2x (0.75…2.5 mm²) finely stranded with ferrule. ## Switching Performance and Contact Ratings Rated operational current at AC-3 (motor switching) is 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V. Maximum switching frequency is 800 cycles/hour at AC-3 and 250 cycles/hour at AC-4 (plugging/reversing). For DC-13 (solenoid/brake) loads at 220 V, the contactor is rated 0.3 A. Surge voltage resistance is 6 kV, and shock resistance is 12.5g / 5 ms (sine pulse at AC). Auxiliary contacts are rated for PLC-level reliability (17 V, 5 mA), ensuring clean signal switching to digital inputs without contact wetting issues. ## Protection and Coordination For type of coordination 2 (short-circuit protection with minimal damage to contactor), use gL/gG NH fuse 3NA: 50 A. For type 1 coordination (no damage to enclosure/personnel, contactor may need replacement), use 125 A. The contactor supports product extension auxiliary switch blocks (screw-type for auxiliary/control circuit), allowing field addition of NO/NC aux contacts without removing wiring.","metaTitle":"Siemens 3RT7027-1AB05 SIRIUS Contactor, 24 VAC Coil, Size S0","metaDescription":"Siemens SIRIUS 3RT7027-1AB05 Size S0 contactor, 24 VAC 50/60 Hz coil, 3-pole, IP20, screw terminals. Active lifecycle, 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":"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 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":"0.82 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","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=1533982&mlfb=3RT7027-1AB05","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT7027-1AB05/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions of the 3RT7027-1AB05?","answer":"Width is 55 mm, height is 85.5 mm, and depth is 91 mm. It is a Size S0 frame contactor."},{"question":"Will the 3RT7027-1AB05 fit a panel designed for the 3RT6027-1AC20?","answer":"Both are Size S0 contactors on a 35 mm DIN rail footprint, so the 3RT7027-1AB05 will mechanically drop into the same panel without rewiring. Verify coil voltage — the 3RT7027-1AB05 uses a 24 VAC coil, while the 3RT6027-1AC20 may differ."},{"question":"How do I get current pricing and availability for the 3RT7027-1AB05?","answer":"Submit an RFQ through this listing. The part is sourced to order through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What compliance documentation is available for the 3RT7027-1AB05?","answer":"The contactor carries IP20 front and terminal protection, pollution degree 3 rating, and surge voltage resistance of 6 kV. Standard Siemens SIRIUS documentation (CE, UL/CSA pending verification) applies. Request specific certificates with your RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT7027-1AB05","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/3RT7027-1AB05 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}}