{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1034-1BB44","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1034-1BB44","canonicalUrl":"https://aoctrl.com/siemens/3RT1034-1BB44","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1BB44","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1034-1BB44, 24 VDC coil, S2 frame size, screw-type terminals, 18.5 kW at 500 V, IP20 front, DIN rail mount.","salesMarkdown":"Rated for 18.5 kW at 500 V and 10 kW at 690 V, this contactor handles the motor starting and running currents typical of pumps, fans, and conveyors in the 10–20 kW range on 400 V three-phase systems. The 24 VDC coil keeps control voltage low for PLC or safety-relay output cards. The front is IP20 (finger-safe), while the terminal area is IP00 — expect to cover the terminals in a panel with the standard finger-duct or terminal shroud. At AC-4 (plugging / inching duty), it is rated 29 A at 400 V, so if your application requires frequent reversing or jogging, stay within that current envelope. AC-1 (resistive load) maximum operating frequency is 1200 cycles per hour; AC-3 drops to 1000 1/h; AC-4 is 250 1/h. These limits govern heater, lighting, or frequent-switching applications — exceed them and the contactor will overheat internally. DC switching capability is also specified: 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V. This matters if you are switching DC solenoids, brake coils, or small DC motor fields — the arc extinction is different from AC, and these numbers are the safe limits. Dimensions: 55 mm wide, 112 mm tall, 179 mm deep. Side-by-side mounting is allowed — no derating required for adjacent contactors, but check the thermal dissipation in a sealed enclosure. Main circuit terminals accept solid wire: 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), max 2x (0.75–4 mm²). Stranded wire: 2x (0.75–25 mm²). Minimum conductor size at 40 °C is 16 mm² — so for high-current runs, plan on at least that gauge.","metaTitle":"Siemens 3RT1034-1BB44 SIRIUS Power Contactor, 24 VDC Coil, S","metaDescription":"Siemens 3RT1034-1BB44 SIRIUS power contactor, 24 VDC coil, S2 size, screw terminals, 18.5 kW at 500 V. DIN rail mount, IP20 front. RoHS compliant. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"179 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":"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":"$126.02","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=479269&mlfb=3RT1034-1BB44","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1BB44/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RT1034-1BB44?","answer":"Submit an RFQ through this listing. Availability and current pricing are confirmed at quote time through independent distribution channels."},{"question":"What is the closest functional second-source to 3RT1034-1BB44?","answer":"The 3RT1044-1FB46 is a larger-frame sibling (S3 vs S2) with higher current ratings — it will not drop into the same panel footprint without rewiring and DIN-rail space adjustment. For a direct fit, stick with the S2 frame size."},{"question":"What compliance documentation does 3RT1034-1BB44 carry?","answer":"RoHS compliance is confirmed with a substance prohibition date of 05/01/2012. The part is CE-marked as standard for the SIRIUS line; UL and CSA listings are typical for this series but should be verified against the specific catalog number at quote time."},{"question":"Will 3RT1034-1BB44 drop into a panel specified for 3RT1044-1FB46?","answer":"No — the 3RT1044-1FB46 is an S3 frame (wider and deeper), so the mounting holes and DIN-rail footprint differ. You would need to re-drill the panel or use an adapter plate."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1034-1BB44","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/3RT1034-1BB44 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}}