{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1034-3EL28-0KS6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1034-3EL28-0KS6","canonicalUrl":"https://aoctrl.com/siemens/3RT1034-3EL28-0KS6","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1034-3EL28-0KS6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S2, 3RT1034-3EL28-0KS6, screw-type terminals, 18.5 kW at 500 V, 10 kW at 690 V, DIN rail mount.","salesMarkdown":"The 3RT1034-3EL28-0KS6: Rated at 18.5 kW at 500 V and 10 kW at 690 V, this contactor handles motor loads typical of medium-voltage distribution in European 400 V / 690 V industrial networks. The 500 V rating covers common 400 V motor applications with headroom; the 690 V rating suits higher-voltage drives or pump/motor circuits in mining, marine, or heavy industry. Main circuit connections use screw-type terminals accepting 2x (0.75... 25 mm²) stranded or 2x (0.25... 2.5 mm²) solid wire. The S2 frame size keeps the footprint compact at 55 mm wide × 129 mm tall × 164 mm deep, fitting standard 55 mm DIN-rail spacing. Maximum switching frequency varies by duty: 1,200 cycles/hour at AC-1 (resistive), 1,000 at AC-3 (motor start/run), 750 at AC-2 (slip-ring motors), and 250 at AC-4 (plugging/inching). Coil operating range spans 0.8–1.1 × rated voltage at 50 Hz and 0.85–1.1 at 60 Hz. Auxiliary contact ratings: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 2 A at 60 V.","metaTitle":"Siemens 3RT1034-3EL28-0KS6 SIRIUS Power Contactor, S2, 18.5","metaDescription":"Siemens SIRIUS 3RT1034-3EL28-0KS6 power contactor, size S2, rated 18.5 kW at 500 V and 10 kW at 690 V. Screw terminals, DIN rail mount, IP20 front. Current active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"164 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"55 mm","at AC":"15g / 5 ms, 8g / 10 ms","at DC":"20 ... 30 ms","Height":"129 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":"230 V","at 500 V rated value":"18.5 kW","at 60 Hz rated value":"230 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","Design Of The Surge Suppressor":"with RC elements","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":"2","number of NO contacts for auxiliary contacts instantaneous contact":"2","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=456202&mlfb=3RT1034-3EL28-0KS6","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1034-3EL28-0KS6/alternatives.json"},"ai":{"faq":[{"question":"What are the key motor ratings for this contactor?","answer":"It is rated for 18.5 kW at 500 V and 10 kW at 690 V, covering typical 400 V motor applications with margin and higher-voltage industrial loads."},{"question":"What mounting and wiring does this contactor require?","answer":"It snaps onto a 35 mm DIN rail per EN 50022 (screw or snap-on). Main circuit terminals accept 2x (0.75–25 mm²) stranded or 2x (0.25–2.5 mm²) solid wire via screw-type connections."},{"question":"What is the operating temperature range?","answer":"Operating range is -25 to +60 °C; storage range is -55 to +80 °C. The front is IP20, but terminals are IP00, so panel enclosure is required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1034-3EL28-0KS6","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/3RT1034-3EL28-0KS6 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}}