{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1034-1BF40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1034-1BF40","canonicalUrl":"https://aoctrl.com/siemens/3RT1034-1BF40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1BF40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1034-1BF40, S2 frame power contactor, screw terminals, 55 mm width, 130 mm depth, AC-2 15 kW / AC-4 29 A at 400 V.","salesMarkdown":"Rated for AC-2 duty at 15 kW and AC-4 reversing duty at 29 A, both at 400 V, this contactor handles slip-ring motor starting and reversing applications where frequent jogging or inching is required. The terminals themselves are IP00 — no touch protection at the wiring point, so panel builders should plan for terminal shrouds or additional guarding. RoHS compliance date is noted as May 1, 2012, and the part carries a substance prohibitance declaration for REACH compliance. At 55 mm wide and 130 mm deep, the S2 frame occupies one standard DIN-rail module position. Side-by-side mounting is permitted — no derating required for adjacent contactors at rated current. The coil terminals accept 2x 0.5–1.5 mm² solid or 2x 0.75–2.5 mm² stranded. Strip length for screw terminals follows standard practice — 10–12 mm for the larger conductors. ## Coil and switching characteristics The 110 V DC coil draws 10 A at 24 V inrush and 1 A at 110 V holding. Dropout time is 20–30 ms, arcing time 10–15 ms — fast enough for most safety circuits but verify coordination with upstream overcurrent devices. Electrical life depends on duty: 1,200 ops/hour at AC-1, 1,000 at AC-3, 750 at AC-2, and 250 at AC-4 — the reversing duty class limits switching frequency to about 4 operations per minute.","metaTitle":"Siemens 3RT1034-1BF40 SIRIUS Power Contactor, S2 Frame, 55 m","metaDescription":"Siemens SIRIUS 3RT1034-1BF40 power contactor, S2 size, 55 mm width, screw terminals, 130 mm depth. Current production. AC-2 15 kW / AC-4 29 A at 400 V. DIN-rail mount. IP20 front.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"130 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 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":"screw-type 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 (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)","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=274541&mlfb=3RT1034-1BF40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1BF40/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation is available for this contactor?","answer":"The part carries a RoHS compliance date of May 1, 2012, and a substance prohibitance declaration for REACH. It is a Siemens SIRIUS product with standard CE and UL certifications typical for the series."},{"question":"Will the 3RT1034-1BF40 drop into a panel designed for the 3RT1036-1AB00?","answer":"Both are SIRIUS S2-frame contactors with the same 55 mm width and DIN-rail mounting pattern, so the mechanical footprint is identical. The key difference is the coil voltage — this unit is 110 V DC, while the 3RT1036-1AB00 uses a different coil. Verify coil supply compatibility before substitution."},{"question":"What are the main circuit terminal capacities?","answer":"Solid conductors: 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², max 2x 0.75–4 mm². Stranded: 2x 0.75–25 mm². Minimum cross-section at 40 °C is 16 mm² for full rated current."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1034-1BF40","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/3RT1034-1BF40 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}}