{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1034-3BB40-ZN88X95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1034-3BB40-ZN88X95","canonicalUrl":"https://aoctrl.com/siemens/3RT1034-3BB40-ZN88X95","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1034-3BB40-ZN88X95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, S2 size, 24 VDC coil, screw-type terminals, 18.5 kW at 500 V AC-3, 55 mm width, IP20 front, snap-on 35 mm DIN rail.","salesMarkdown":"The Siemens 3RT1034-3BB40-ZN88X95 is a SIRIUS S2-frame power contactor rated for 18.5 kW at 500 V AC-3, with a 24 VDC coil. The IP20 front and IP00 terminal area mean it's safe for finger contact on the face but the wiring zone expects enclosure protection. The AC-3 motor rating of 18.5 kW at 500 V tells you this contactor handles a standard 25 hp induction motor on a 480 V line. At 400 V AC-4 it's rated 29 A — that's the reversing or plugging duty cycle, so if your application jogs or brakes the load frequently, this is the number that governs contact life, not the AC-3 figure. Coil pickup at 24 VDC draws 10 A inrush (at rated value), holding at 0.8 A initial. Dropout time is 20 to 30 ms, arcing time 10 to 15 ms — that's fast enough for most safety circuits but verify your PLC cycle time if you're sequencing multiple contactors. Terminals accept solid 2x (0.25 to 2.5 mm²) or stranded 2x (0.75 to 25 mm²) on the main circuit — screw-type, so you'll need a torque driver for the larger lugs. The 55 mm width and 112 mm height leave room for auxiliary contact blocks alongside. ## Integration notes","metaTitle":"Siemens 3RT1034-3BB40-ZN88X95 SIRIUS Power Contactor, 18.5 k","metaDescription":"Siemens SIRIUS power contactor 3RT1034-3BB40-ZN88X95, S2 frame, 24 VDC coil, 18.5 kW at 500 V AC-3, screw terminals, IP20 front. Active production, sourced to order. Request quote.","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":"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","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=425346&mlfb=3RT1034-3BB40-ZN88X95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1034-3BB40-ZN88X95/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1034-3BB40-ZN88X95 and how do I get a price?","answer":"This contactor is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time."},{"question":"What is 3RT1034-3BB40-ZN88X95's motor rating at 500 V?","answer":"It is rated 18.5 kW at 500 V AC-3, which covers a 25 hp motor on a 480 V supply."},{"question":"Will 3RT1034-3BB40-ZN88X95 drop into a panel specified around 3RT1044-1FB46?","answer":"The 3RT1044-1FB46 is a larger-frame contactor (S3 vs S2). The 3RT1034-3BB40-ZN88X95 is narrower at 55 mm and has a lower AC-3 rating, so it will not directly replace a 3RT1044 without rewiring and verifying the load current."},{"question":"What compliance documentation does this contactor carry?","answer":"It meets RoHS with a substance prohibition date of 05/01/2012. The evidence does not list UL, CSA, or IEC certifications, but the SIRIUS series typically carries these; verify the specific nameplate markings for your jurisdiction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1034-3BB40-ZN88X95","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/3RT1034-3BB40-ZN88X95 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}}