{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1034-3BW40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1034-3BW40","canonicalUrl":"https://aoctrl.com/siemens/3RT1034-3BW40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1034-3BW40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, Size S2, 3RT1034-3BW40, 18.5 kW at 500 V AC-3, 29 A AC-4 at 400 V, screw terminals, DIN rail mount, IP20 front.","salesMarkdown":"Its AC-3 rating of 18.5 kW at 500 V means it handles standard squirrel-cage motors up to that power — the typical duty for conveyors, pumps, and fans. AC-2 at 400 V is rated 15 kW, covering slip-ring motor starting. Main circuit connections use screw-type terminals, accepting solid conductors up to 2x 2.5 mm² or stranded up to 2x 25 mm². Side-by-side mounting is permitted, which saves panel width when ganging multiple contactors — no required air gap between units. ## Environmental and compliance data The contactor carries a RoHS substance prohibition date of 05/01/2012, indicating compliance with the EU RoHS directive. Front-of-device protection is IP20; the terminal area is IP00 (requires enclosure protection). ## Coil and auxiliary ratings The coil circuit is rated 48 V. Switching times: DC operate 20...30 ms, arcing time 10...15 ms. Auxiliary contact ratings at 24 V: 10 A; at 60 V: 2 A; at 110 V: 1 A; at 220 V: 0.3 A; at 230 V: 6 A; at 400 V: 3 A. Mechanical life of the contactor typical is 10 million operations. Maximum switching frequency varies by duty: AC-1 resistive loads up to 1,200 cycles/hour, AC-2 at 750, AC-3 at 1,000, AC-4 at 250 cycles/hour.","metaTitle":"Siemens 3RT1034-3BW40 SIRIUS Power Contactor, Size S2, 18.5","metaDescription":"Siemens SIRIUS 3RT1034-3BW40 power contactor, Size S2, rated 18.5 kW at 500 V AC-3, 29 A AC-4 at 400 V. Screw terminals, DIN rail mount. Current lifecycle. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"130 mm","Solid":"2x (0.25 ... 2.5 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":"48 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":"spring-loaded 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 (24 ... 14)","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 (0.25 ... 1.5 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 (0.25 ... 2.5 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=109900&mlfb=3RT1034-3BW40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1034-3BW40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1034-3BW40 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at the time of quotation."},{"question":"What is the closest functional second-source to 3RT1034-3BW40?","answer":"The 3RT5034-1BW40 is a SIRIUS contactor in the same Size S2 frame with similar AC-3 power ratings, but it uses spring-cage terminals instead of screw terminals — check terminal compatibility before substituting."},{"question":"What compliance documentation does 3RT1034-3BW40 carry?","answer":"RoHS compliance is confirmed with a substance prohibition date of 05/01/2012. The contactor is designed to IEC 60947-1 (pollution degree 3) and mounts on DIN rail per EN 50022."},{"question":"Will 3RT1034-3BW40 drop into a panel specified around 3RT1044-1FB46?","answer":"The 3RT1044-1FB46 is a larger Size S3 frame with higher current ratings — it will not fit the same DIN rail footprint or terminal layout as the Size S2 3RT1034-3BW40 without panel rework."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1034-3BW40","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/3RT1034-3BW40 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}}