{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1034-3AC20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1034-3AC20","canonicalUrl":"https://aoctrl.com/siemens/3RT1034-3AC20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1034-3AC20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, size S2, 3RT1034-3AC20, 15 kW AC-2 at 400 V, screw and snap-on mounting on 35 mm DIN rail.","salesMarkdown":"## SIRIUS 3RT1034-3AC20 — Power Contactor, Size S2 The Siemens SIRIUS 3RT1034-3AC20 is a size S2 power contactor rated for 15 kW in AC-2 duty at 400 V — the utilisation category for slip-ring motor starting and reversing, where the contactor makes and breaks the rotor current at reduced voltage. Per the datasheet, the mechanical life is typical 10 million operations; the electrical life at AC-3 duty is rated at 1 000 switching cycles per hour maximum, and at AC-4 (plugging/inching) it drops to 250 cycles per hour. The enclosure face carries an IP20 rating (finger-safe terminals on the front); the terminal area itself is rated IP00, meaning the wiring compartment is open to the panel environment — standard practice for enclosed contactor panels, but something to note if you're running this in a dust-prone cabinet without a separate enclosure. ## Wiring and Terminal Data Main current circuit terminals are screw-type. Solid conductors: 2x (0.25... 2.5 mm²). Stranded conductors: 2x (0.75... 25 mm²). The 25 mm² upper end on stranded is generous for a size S2 — it accommodates larger cable lugs without a terminal reducer. Depth is 115 mm, width 55 mm, height 112 mm; the 55 mm width matches the standard S2 footprint, so panel cut-outs and gland-plate planning are straightforward.","metaTitle":"Siemens 3RT1034-3AC20 SIRIUS Power Contactor, 15 kW AC-2 at","metaDescription":"Siemens SIRIUS 3RT1034-3AC20 power contactor, size S2. Rated 15 kW AC-2 at 400 V. Current lifecycle stage. Screw and snap-on DIN rail mounting. Available to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"115 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"55 mm","at AC":"7 ... 20 ms","Height":"112 mm","Stranded":"2x (0.75 ... 25 mm²)","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","Arcing Time":"10 ... 15 ms","On The Front":"IP20","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","During Storage":"-55 ... +80 °C","Of The Terminal":"IP00","at AC-1 maximum":"1 200 1/h","at AC-2 maximum":"750 1/h","at AC-3 maximum":"1 000 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 standard mounting rail according to DIN EN 50022","Size Of Contactor":"S2","Solid Or Stranded":"2x (0.75 ... 16 mm²)","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"power contactor","at 24 V rated value":"10 A","at 60 V rated value":"2 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":"6 A","at 400 V rated value":"3 A","at 50 Hz rated value":"24 V","at 500 V rated value":"18.5 kW","at 60 Hz rated value":"24 V","at 690 V rated value":"10 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"15 kW","at AC-4 at 400 V rated value":"29 A","Substance Prohibitance (Date)":"05/01/2012","at 40 °C minimum permissible":"16 mm²","at 60 °C minimum permissible":"10 mm²","Insulation Voltage Rated Value":"690 V","at 230 V at 60 °C rated value":"18 kW","at 690 V at 60 °C rated value":"54 kW","at AWG cables for main contacts":"2x (18 ... 2)","For Auxiliary And Control Circuit":"spring-loaded terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 63 A","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"fuse gL/gG: 125 A","at AWG cables for auxiliary contacts":"2x (24 ... 14)","operational current at AC-12 maximum":"10 A","number of NC contacts for main contacts":"0","number of NO contacts for main contacts":"3","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Thermal Short-Time Current Limited To 10 S":"320 A","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","apparent holding power of magnet coil at AC":"11.3 VA","apparent pick-up power of magnet coil at AC":"127 VA","Type Of Voltage Of The Control Supply Voltage":"AC","Required Spacing For Grounded Parts At The Side":"6 mm","contact rating of auxiliary contacts according to UL":"A600 / Q600","Inductive Power Factor With Closing Power Of The Coil":"0.73","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.41","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":"0","number of NO contacts for auxiliary contacts instantaneous contact":"0","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000"}},"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=459146&mlfb=3RT1034-3AC20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1034-3AC20/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to 3RT1034-3AC20?","answer":"The 3RT1026-1AB00 is a smaller frame size (S0) with lower current ratings — it will not drop into a panel wired for the S2 footprint without rewiring and re-drilling the mounting rail. For a direct S2 replacement, the 3RT5034-1BW40 and 3RT5034-1AP00 are in the same frame size but belong to the SIRIUS 3RT5 series; verify coil voltage and auxiliary contact configuration before substituting."},{"question":"What compliance documentation is available for 3RT1034-3AC20?","answer":"As a Siemens SIRIUS product, this contactor carries CE marking for the European market and is designed to meet IEC 60947-4-1. RoHS and REACH declarations are typically available from Siemens documentation portals. UL/CSA listings are standard for the SIRIUS range but should be confirmed against the specific variant's UL file number."},{"question":"How do I get current pricing and availability for 3RT1034-3AC20?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1034-3AC20","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/3RT1034-3AC20 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}}