{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1034-3BD40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1034-3BD40","canonicalUrl":"https://aoctrl.com/siemens/3RT1034-3BD40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1034-3BD40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, 3RT1034-3BD40, S2 size, 18.5 kW at 500 V AC-3, screw-type terminals, DIN rail snap-on mounting, IP20 front, IP00 terminals.","salesMarkdown":"The S2 footprint is 55 mm wide, 112 mm tall, 130 mm deep — a standard slice that fits alongside other SIRIUS gear. Main circuit terminals are screw-type, accepting 2x (0.75…25 mm²) stranded or 2x (0.25…2.5 mm²) solid. Auxiliary terminals take 2x (0.75…16 mm²) solid or stranded. ## Ratings That Drive Selection AC-3 motor switching is the headline: 18.5 kW at 500 V and 10 kW at 690 V. AC-3 allows 1 000 ops/h; AC-4 jogging is limited to 250 ops/h. The coil picks up at 80 % of rated control voltage (42 V) and drops out at 110 %, so it holds in during sags but releases cleanly on brownout.","metaTitle":"Siemens 3RT1034-3BD40 SIRIUS Power Contactor, S2 Size, 18.5","metaDescription":"Siemens SIRIUS 3RT1034-3BD40 power contactor, S2 size, rated 18.5 kW at 500 V AC-3. Current production. Screw terminals, DIN rail mount. IP20 front. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"130 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"55 mm","at DC":"20 ... 30 ms","Height":"112 mm","Stranded":"2x (0.75 ... 25 mm²)","Arcing Time":"10 ... 15 ms","Rated Value":"42 V","On The Front":"IP20","Initial Value":"0.8","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","Full-Scale Value":"1.1","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 500 V rated value":"18.5 kW","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","closing power of magnet coil at DC":"13.3 W","holding power of magnet coil at DC":"13.3 W","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)","Type Of Voltage Of The Control Supply Voltage":"DC","Required Spacing For Grounded Parts At The Side":"6 mm","contact rating of auxiliary contacts according to UL":"A600 / Q600","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","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=61286&mlfb=3RT1034-3BD40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1034-3BD40/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to the 3RT1034-3BD40?","answer":"The 3RT1034-1AN60-1AA0 is a peer in the same SIRIUS S2 frame. The main difference is the coil voltage and terminal type — the -3BD40 uses screw terminals, while the -1AN60-1AA0 carries a different coil variant. Both share the same S2 footprint and AC-3 motor ratings, so a panel designed for one can accept the other without rewiring, provided the coil supply matches."},{"question":"What compliance documentation does the 3RT1034-3BD40 carry?","answer":"RoHS compliance is confirmed with a substance prohibition date of May 1, 2012. The contactor is designed for IEC and EN standards (pollution degree 3, EN 50022 rail). UL/CSA listing is typical for SIRIUS contactors but not explicitly confirmed in this variant's entry."},{"question":"What wire sizes does the 3RT1034-3BD40 accept?","answer":"Main circuit screw terminals accept 2x (0.75…25 mm²) stranded or 2x (0.25…2.5 mm²) solid. Auxiliary terminals accept 2x (0.75…16 mm²) solid or stranded. At 40 °C the minimum permissible conductor is 16 mm² for the main circuit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1034-3BD40","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/3RT1034-3BD40 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}}