{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1034-1QB44-3MA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1034-1QB44-3MA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1034-1QB44-3MA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1QB44-3MA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S2, 3RT1034-1QB44-3MA0, 24 VDC coil, screw terminals, 18.5 kW at 500 V AC-3, snap-on DIN rail.","salesMarkdown":"The Siemens 3RT1034-1QB44-3MA0 is a SIRIUS power contactor in the S2 frame size — the workhorse for switching three-phase motor loads up to 18.5 kW at 500 V under AC-3 duty. The 24 VDC coil pulls in reliably and holds at 0.8 of rated, so it's suited for PLC-driven 24 V control circuits common in automated lines. The 55 mm width and 112 mm height are standard for the S2 frame — it'll fit alongside overload relays and busbars in a compact motor control center. Wiring is via screw terminals on the main circuit, accepting solid conductors up to 2x (0.75...4 mm²) and stranded up to 2x (0.75...25 mm²). The terminal rating is IP00 at the connection point, while the front face carries IP20 — finger-safe once installed in an enclosure, but the wiring side needs the panel cover closed before anyone reaches in. ## Duty cycles and environment Operating temperature spans -25 to +60 °C, with storage from -55 to +80 °C — fine for most indoor industrial panels, though if you're mounting it near a furnace or in a desert plant, keep the ambient under 60. Mechanical life is typical at 10 million operations; electrical life varies by duty: 1,200 cycles/hour at AC-1, 1,000 at AC-3, and 250 at AC-4 — the AC-4 figure is the one to watch if you're doing frequent reversing or plugging.","metaTitle":"Siemens 3RT1034-1QB44-3MA0 SIRIUS Power Contactor, S2, 24 VD","metaDescription":"Siemens SIRIUS 3RT1034-1QB44-3MA0 power contactor, size S2, 24 VDC coil, 18.5 kW at 500 V. Active production. Screw terminals, DIN rail. Quoted 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","Design Of The Surge Suppressor":"with diode assemblies","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":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=112655&mlfb=3RT1034-1QB44-3MA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1QB44-3MA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1034-1QB44-3MA0 and how do I get a price?","answer":"We source this part to order. Submit an RFQ with your quantity, and we'll confirm availability and current pricing. No stock figures or lead-time numbers here — that's what the quote provides."},{"question":"What is the closest functional second-source to 3RT1034-1QB44-3MA0?","answer":"The closest functional peer is the 3RT1044-1FB46, which is a larger S3 frame size. It will not drop into the same panel footprint without rewiring or enlarging the enclosure — the S2 (55 mm wide) and S3 frames differ in mounting hole pattern and terminal layout. For a direct swap, stay with the S2 frame."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1034-1QB44-3MA0","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/3RT1034-1QB44-3MA0 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}}