{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT7027-1AH05","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT7027-1AH05","canonicalUrl":"https://aoctrl.com/siemens/3RT7027-1AH05","factsUrl":"https://aoctrl.com/api/mcp/products/3RT7027-1AH05","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S0 contactor, 3RT7027-1AH05, 3-pole, screw terminals, 690 V AC-3 / AC-3e rated, 55 mm wide, IP20 finger-safe.","salesMarkdown":"The 3RT7027-1AH05 is a Siemens SIRIUS S0-frame contactor — size S0 is the compact workhorse for motor loads up to the 690 V AC-3 / AC-3e rated maximum. The AC-3 and AC-3e ratings both top out at 690 V. The 6 kV surge voltage resistance and pollution degree 3 mean this contactor holds up in the dirtier electrical environments you find near motors and drives. Auxiliary contacts are rated for PLC-level signals — the spec calls out acceptability for PLC control at 17 V, 5 mA. The IP20 finger-safe enclosure on front and terminals means the panel builder doesn't need extra shrouding for routine access. Operating range is -10 to +55 °C, storage from -25 to +70 °C. That's fine for most indoor control panels; if the panel sits near a furnace or in a desert warehouse, watch the upper end. Shock resistance of 12.5g at 5 ms and 7.8g at 10 ms handles forklift bumps and door slams. ## Coil and switching cycle limits The DC magnet coil draws 0.82 W on closing and 0.24 W holding. The coil power is built into the S0 frame design; no external coil suppression needed for basic use. Maximum switching rate at AC-3 / AC-3e is 800 operations per hour; at AC-4 it drops to 250 per hour. AC-4 is plugging or inching duty — if your application jogs the motor repeatedly, you're limited to one cycle every 14 seconds. For normal starting (AC-3), one every 4.5 seconds is fine.","metaTitle":"Siemens 3RT7027-1AH05 Contactor, S0 Frame, 3-Pole","metaDescription":"Siemens 3RT7027-1AH05 S0 contactor, 3-pole, 690 V AC-3/AC-3e rated, 55 mm wide, IP20. Active production. Sourced to order against 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 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":"48 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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1533997&mlfb=3RT7027-1AH05","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT7027-1AH05/alternatives.json"},"ai":{"faq":[{"question":"Is 3RT7027-1AH05 compatible with 3RT7026-1AH05?","answer":"Both are S0-frame contactors from the same SIRIUS series, so they share the same mounting footprint and terminal layout. The 3RT7027 is a higher-current variant within the S0 frame. Verify the specific coil voltage and auxiliary configuration for your application."},{"question":"Where can I buy 3RT7027-1AH05?","answer":"This part is sourced to order against an RFQ. Availability and pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT7027-1AH05","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/3RT7027-1AH05 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}}