{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1034-1BB40-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1034-1BB40-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1034-1BB40-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1BB40-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S2 power contactor, 3RT1034-1BB40-1AA0, 24 VDC coil, screw-type terminals, 18.5 kW at 500 V, IP20 front, snap-on DIN rail.","salesMarkdown":"Rated 18.5 kW at 500 V in AC-3 duty (motor switching), this contactor handles the typical 3-phase induction motor load profile. The AC-1 resistive rating supports 1200 operations per hour; AC-3 motor duty allows 1000 ops/h, while the more severe AC-4 (plugging/reversing) is limited to 250 ops/h. That spread tells you the thermal capacity is there for high-duty-cycle conveyor or pump applications, but you need to derate for frequent inching or reversing. Coil pickup is guaranteed at 0.8x rated voltage (19.2 VDC), dropout at 1.1x (26.4 VDC). The DC arcing time runs 20–30 ms, which is typical for DC-operated contactors and matters when coordinating with upstream semiconductor fuses or fast-acting breakers. Main circuit terminals accept solid conductors from 2x (0.5 to 1.5 mm²) up to max 2x (0.75 to 4 mm²), and stranded conductors from 2x (0.75 to 25 mm²). The auxiliary/control circuit accepts 2x (0.75 to 16 mm²) solid or stranded.","metaTitle":"Siemens 3RT1034-1BB40-1AA0 SIRIUS S2 Power Contactor, 24 VDC","metaDescription":"Siemens SIRIUS 3RT1034-1BB40-1AA0 power contactor, size S2, 24 VDC coil, screw terminals. Rated 18.5 kW at 500 V. Current production. 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 (0.5 ... 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":"24 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=340347&mlfb=3RT1034-1BB40-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1BB40-1AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RT1034-1BB40-1AA0?","answer":"The Siemens 3RT5034-1BW40 and 3RT5034-1AP00 are in the same SIRIUS family but differ in coil voltage and terminal style. The 3RT1044-1FB46 is a larger frame (S3 vs S2) with higher current ratings — it will not drop into the same panel footprint without rewiring and resizing the DIN rail space. No exact drop-in second-source exists outside the Siemens SIRIUS range."},{"question":"What solid conductor sizes does 3RT1034-1BB40-1AA0 accept?","answer":"The main circuit terminals accept solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and max 2x (0.75 to 4 mm²). The auxiliary circuit accepts 2x (0.75 to 16 mm²) solid or stranded."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1034-1BB40-1AA0","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/3RT1034-1BB40-1AA0 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}}