{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1034-1BD40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1034-1BD40","canonicalUrl":"https://aoctrl.com/siemens/3RT1034-1BD40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1BD40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S2, order code 3RT1034-1BD40, 55 mm wide, screw-type terminals, AC-3 switching at 1000 operations per hour, 18.5 kW at 500 V.","salesMarkdown":"The Siemens 3RT1034-1BD40 is a SIRIUS-brand power contactor in the S2 frame size, rated for motor switching duty. It handles AC-3 loads up to 1000 operations per hour, delivering 18.5 kW at 500 V and 10 kW at 690 V. That figure governs the contactor's wear-out interval in high-cycle applications like stamping presses or packaging lines — plan spares around it, not the electrical endurance. ## Where it fits — panel and environment The 55 mm width and 112 mm height fit standard DIN-rail enclosures. Depth is 130 mm, which clears most 200 mm deep cabinets with room for wiring ducts. For high-ambient panels near ovens or foundry lines, the +60 °C ceiling is the limit — above that, derate per the thermal curve. Arcing time is 10 to 15 ms at DC, and the contactor's DC switching capability is specified by voltage: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V. These are the make-and-break ratings for DC loads — inductive loads like DC brake coils or solenoid valves need the lower end of the curve. AC switching frequencies: AC-1 resistive loads up to 1200 ops/h, AC-2 slip-ring motors at 750 ops/h, AC-3 squirrel-cage at 1000 ops/h, AC-4 plugging/inching at 250 ops/h. At 400 V, the contactor is rated 15 kW in AC-2 and 29 A in AC-4. The AC-2 rating applies to wound-rotor motors where the starting current is lower; AC-4 covers the full locked-rotor current during reversing. RoHS compliance date is May 1, 2012, covering the EU RoHS directive. The contactor carries no built-in auxiliary contacts or surge suppression — those are ordered separately as add-on blocks.","metaTitle":"Siemens 3RT1034-1BD40 SIRIUS Power Contactor, Size S2, 55 mm","metaDescription":"Siemens 3RT1034-1BD40 SIRIUS power contactor, size S2, 55 mm wide. Rated AC-3 1000 ops/h, 18.5 kW at 500 V. Screw terminals, DIN rail mount. Sourced to order. RoHS compliant.","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":"42 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=470726&mlfb=3RT1034-1BD40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1BD40/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of the 3RT1034-1BD40?","answer":"The depth is 130 mm, with a width of 55 mm and height of 112 mm."},{"question":"What wire sizes does the 3RT1034-1BD40 accept?","answer":"Solid wire: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Stranded: 2x (0.75 to 25 mm²)."},{"question":"Will the 3RT1034-1BD40 drop into a panel specified around the 3RT1044-1FB46?","answer":"No — the 3RT1044-1FB46 is a larger frame size with different mounting footprint and terminal spacing. The 3RT1034-1BD40 is size S2; the 3RT1044 is a size S3 or S6 variant. Panel cutouts and DIN-rail positions would need rework."},{"question":"Where can I buy the 3RT1034-1BD40?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1034-1BD40","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/3RT1034-1BD40 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}}