{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1034-3BF40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1034-3BF40","canonicalUrl":"https://aoctrl.com/siemens/3RT1034-3BF40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1034-3BF40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1034-3BF40 power contactor, size S2, 110 V coil, screw terminals, 29 A AC-4 at 400 V, 18.5 kW at 500 V, IP20 front, for DIN rail mounting.","salesMarkdown":"It carries a 110 V coil and is rated for AC-4 duty at 29 A at 400 V, meaning it can handle severe inrush and plugging duty for motors up to that current. At 500 V it is rated for 18.5 kW motor output, and at 690 V for 10 kW. The main circuit uses screw-type terminals, accepting solid wires from 0.25 to 2.5 mm² and stranded wires from 0.75 to 25 mm². The AC-2 rating at 15 kW at 400 V covers slip-ring motor starting. For resistive loads (AC-1), the maximum switching frequency is 1200 operations per hour; for AC-3 (standard squirrel-cage motor start/run) it is 1000 ops/h, and for AC-4 it drops to 250 ops/h due to the heavier electrical wear. The auxiliary contact ratings at 24 V (10 A), 110 V (1 A), and 230 V (6 A) cover typical PLC or relay interface levels. Dimensions: width 55 mm, height 112 mm, depth 130 mm. The contactor is rated for use in enclosures with pollution degree 3.","metaTitle":"Siemens SIRIUS 3RT1034-3BF40 Power Contactor, 110 V Coil, 29","metaDescription":"Siemens SIRIUS 3RT1034-3BF40 power contactor, 110 V coil, 29 A AC-4 at 400 V, 18.5 kW at 500 V. Current lifecycle stage. DIN rail mount. RoHS compliant.","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":"110 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=38522&mlfb=3RT1034-3BF40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1034-3BF40/alternatives.json"},"ai":{"faq":[{"question":"What are the key power ratings for this contactor?","answer":"AC-4 at 400 V is 29 A; AC-2 at 400 V is 15 kW; motor output at 500 V is 18.5 kW; at 690 V is 10 kW. Coil voltage is 110 V."},{"question":"What is the physical size and mounting?","answer":"Width 55 mm, height 112 mm, depth 130 mm. Mounts on 35 mm DIN rail per EN 50022 via screw or snap-on. Side-by-side mounting is permitted."},{"question":"What compliance documentation is available?","answer":"RoHS compliant with a substance prohibition date of May 1, 2012. The product is part of the Siemens SIRIUS brand."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1034-3BF40","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/3RT1034-3BF40 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}}