{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1034-1AC20-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1034-1AC20-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1034-1AC20-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1AC20-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S2 power contactor, 3RT1034-1AC20-1AA0, 15 kW at 400 V AC-2, screw-type terminals, 24 V 50/60 Hz coil, IP20 front.","salesMarkdown":"The Siemens 3RT1034-1AC20-1AA0 is a SIRIUS S2 power contactor — the core switching device for motor loads in a control panel. It's rated 15 kW at 400 V in AC-2 duty (slip-ring motors, reversing starts), 18.5 kW at 500 V, and 10 kW at 690 V, so it covers the common European motor voltages up to that power band. The coil is 24 V 50/60 Hz, which is the standard control voltage across most industrial panels. The S2 frame size is the mid-range in the SIRIUS contactor family; it's a fast mover for general motor switching up to about 7.5 kW direct-on-line or 15 kW in AC-2 duty. Conductor cross-section range is generous: solid up to 2x 4 mm², stranded up to 2x 25 mm², so it handles the wire sizes you'd expect for this current class without needing lug adapters. The 15 kW at 400 V AC-2 rating is the one that decides the motor size it can handle in reversing or inching applications — AC-2 is harder on contacts than AC-3 because the motor is re-energized against a rotating field. If your load is a standard squirrel-cage motor (AC-3), this contactor will switch a higher kW than the AC-2 figure; the AC-3 rating isn't listed here, but the S2 frame typically covers up to 18.5 kW at 400 V AC-3. For resistive loads (AC-1), the switching frequency can go up to 1200 operations per hour; for AC-4 (plugging/reversing at full load), it drops to 250 per hour — that's the contact wear limit. The auxiliary contacts handle 10 A at 24 V, 6 A at 230 V, 3 A at 400 V — enough for a PLC input or a small relay coil. IP20 on the front, IP00 at the terminals: the terminals are live when the panel door is open, so standard finger-safe terminal shrouds are expected. The dimensions are 112 mm high, 55 mm wide, 115 mm deep — that's the S2 envelope, which is about the size of a small relay base plus a bit of depth for the arc chamber. The 24 V coil holds in at 0.8 to 1.1 times rated voltage at 50 Hz (0.85 to 1.1 at 60 Hz), so it stays pulled in even if the control transformer sags a bit. For a maintenance planner: this is a fast mover in the SIRIUS line. Keep one on the shelf if you have multiple panels with S2 contactors — the 24 V coil variant is the most common control voltage, so it covers the majority of swap-outs. The screw terminals mean no special tooling needed for replacement; a standard screwdriver is all it takes.","metaTitle":"Siemens 3RT1034-1AC20-1AA0 SIRIUS S2 Power Contactor, 15 kW","metaDescription":"Siemens SIRIUS S2 power contactor 3RT1034-1AC20-1AA0. Rated 15 kW at 400 V AC-2. Screw terminals, 24 V 50/60 Hz coil. DIN rail snap-on. Current lifecycle stage. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"115 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 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":"screw-type 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 (20 ... 16), 2x (18 ... 14), 1x 12","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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 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 (0.75 ... 16 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=171340&mlfb=3RT1034-1AC20-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1AC20-1AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1034-1AC20-1AA0?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the depth of 3RT1034-1AC20-1AA0?","answer":"The depth is 115 mm, with a width of 55 mm and height of 112 mm."},{"question":"What wire sizes does the 3RT1034-1AC20-1AA0 accept?","answer":"Solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Stranded: 2x (0.75 to 25 mm²). The main circuit uses screw-type terminals."},{"question":"Will 3RT1034-1AC20-1AA0 drop into a panel specified around 3RT1026-1AB00?","answer":"The 3RT1026-1AB00 is an S0 frame (45 mm wide) while the 3RT1034-1AC20-1AA0 is an S2 frame (55 mm wide). The DIN rail mounting is the same, but the wider footprint and different terminal layout may require panel rework — it's not a direct mechanical swap without adjusting the rail spacing and wiring."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1034-1AC20-1AA0","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/3RT1034-1AC20-1AA0 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}}