{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1034-1XB40-1LA4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1034-1XB40-1LA4","canonicalUrl":"https://aoctrl.com/siemens/3RT1034-1XB40-1LA4","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1XB40-1LA4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, size S2, 3RT1034-1XB40-1LA4, 29 A AC-4 at 400 V, 18.5 kW at 500 V, screw-type terminals, IP20 front, IP00 terminal, snap-on 35 mm DIN rail.","salesMarkdown":"## Siemens SIRIUS 3RT1034-1XB40-1LA4 — S2 Power Contactor, AC-4 Rated 29 A Its 29 A rating in AC-4 duty at 400 V means it handles the severe inrush and plugging/ reversing cycles typical of crane, hoist, and press drives — not just steady-state running. The 18.5 kW rating at 500 V and 10 kW at 690 V cover the motor power range for a 400 V class machine. The main current circuit uses screw-type terminals; solid wire capacity is 2x (0.5 to 1.5 mm²) and 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Stranded wire accepts 2x (0.75 to 25 mm²). ## Duty Cycles and Life Switching frequency varies by duty: 1 200 cycles/hour in AC-1 (resistive), 1 000 in AC-3 (motor running), 750 in AC-2 (slip-ring motor), and 250 in AC-4 (plugging/reversing).","metaTitle":"Siemens SIRIUS 3RT1034-1XB40-1LA4 Power Contactor, S2, 29 A","metaDescription":"Siemens SIRIUS 3RT1034-1XB40-1LA4 power contactor, size S2, 29 A AC-4 at 400 V, 18.5 kW at 500 V, screw terminals, IP20 front, snap-on DIN rail. Active production. Quoted to order.","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":"142 mm","Stranded":"2x (0.75 ... 25 mm²)","Arcing Time":"10 ... 15 ms","Rated Value":"24 V","On The Front":"IP20","Initial Value":"0.7","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":"-40 ... +70 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Full-Scale Value":"1.25","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 varistor","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":"15 W","holding power of magnet coil at DC":"11 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=470104&mlfb=3RT1034-1XB40-1LA4","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1XB40-1LA4/alternatives.json"},"ai":{"faq":[{"question":"What is 3RT1034-1XB40-1LA4's listed depth?","answer":"The depth is 130 mm."},{"question":"What solid wire sizes does the 3RT1034-1XB40-1LA4 accept?","answer":"Solid wire capacity is 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and max 2x (0.75 to 4 mm²)."},{"question":"Will 3RT1034-1XB40-1LA4 drop into a panel specified around 3RT1044-1FB46 without rewiring?","answer":"The 3RT1034-1XB40-1LA4 is a size S2 contactor; the 3RT1044-1FB46 is a different frame size and rating class, so a direct drop-in without checking the mounting footprint and terminal spacing is not assured. Compare the physical dimensions and terminal layout before assuming interchangeability."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1034-1XB40-1LA4","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/3RT1034-1XB40-1LA4 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}}