{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1034-1BW40-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1034-1BW40-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RT1034-1BW40-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1BW40-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S2 power contactor, 3RT1034-1BW40-ZX95, screw-type terminals, 55 mm width, 18.5 kW at 400 V AC-3, 10 A at 24 V DC, snap-on 35 mm DIN rail.","salesMarkdown":"## Siemens 3RT1034-1BW40-ZX95 — SIRIUS S2 Power Contactor Rated for AC-3 duty at 400 V at 18.5 kW and AC-4 at 400 V at 29 A, this contactor handles induction motor starting and inching/plugging applications. For DC loads, it switches up to 10 A at 24 V, 2 A at 60 V, and 0.3 A at 220 V — figures that govern its use in battery-backed or DC bus circuits. The enclosure is rated IP20 on the front and IP00 at the terminal area, meaning it requires installation within a higher-rated cabinet for washdown or dusty environments. For BOM freeze or compliance audits, the part carries a substance prohibitance date of 05/01/2012, aligning with RoHS and REACH requirements. ## Installation & Integration Notes Side-by-side mounting is permitted, which simplifies multi-contactor motor starter assemblies on a single DIN rail segment. The S2 frame leaves clearance for auxiliary contact blocks on either side — verify the ZX95 suffix denotes any special packaging or variant marking, not a functional change. ## Why This Rating Set Matters for Your BOM The AC-3 maximum switching rate of 1,000 operations per hour suits frequent start-stop cycles on conveyors or pumps, but not the high-duty inching of AC-4 (250 ops/h). The 10,000,000 mechanical cycle rating gives a long service life under normal motor switching. DC switching ratings are derated significantly from AC — the 10 A at 24 V drops to 0.3 A at 220 V due to arc extinction limits. If your BOM uses this contactor in a DC circuit above 60 V, confirm the load current is under the 2 A threshold at that voltage.","metaTitle":"Siemens 3RT1034-1BW40-ZX95 SIRIUS Power Contactor, S2, 55mm","metaDescription":"Siemens SIRIUS power contactor 3RT1034-1BW40-ZX95, size S2, 55 mm width, screw terminals, 18.5 kW at 400 V AC-3, snap-on DIN rail. Current lifecycle stage. Sourced to order. Reques","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":"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":"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=268464&mlfb=3RT1034-1BW40-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1034-1BW40-ZX95/alternatives.json"},"ai":{"faq":[{"question":"Does 3RT1034-1BW40-ZX95 drop into a panel designed for 3RT5034-1BW40?","answer":"Both are S2 frame contactors on 55 mm width with similar DIN rail mounting, but the 3RT5034 series uses spring-type terminals while this part uses screw-type terminals. The mounting footprint and rail position are identical, but wiring method differs — no rewiring of the rail position is needed, but terminal preparation (ferrules vs bare wire) changes."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1034-1BW40-ZX95","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/3RT1034-1BW40-ZX95 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}}