{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1036-3BW40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1036-3BW40","canonicalUrl":"https://aoctrl.com/siemens/3RT1036-3BW40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1036-3BW40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S2, 3RT1036-3BW40, 41 A AC-4 at 400 V, screw-type terminals, 55 mm width, IP20 front.","salesMarkdown":"The key motor-switching rating is 41 A at AC-4 duty at 400 V, which covers severe inching, plugging, and reversing applications where the contactor must interrupt locked-rotor currents. For less demanding AC-2 duty at 400 V, it handles 22 kW, typical for slip-ring motor starting. ## Terminals and wiring Main current circuit connections use screw-type terminals. The main circuit accepts stranded wire up to 2x 25 mm² or solid up to 2x 2.5 mm², with a minimum permissible cross-section of 16 mm² at 40 °C. This gives you headroom for the full rated current without derating the terminal block. The front of the contactor carries IP20 protection, so accidental finger contact with live terminals during panel access is guarded against. The terminal area itself is IP00, which is normal for enclosed panel installations. Electrical life varies by duty: maximum 1,000 operations per hour at AC-1, 800 at AC-3, and 300 at AC-4. These matter when coordinating contactors in a reversing starter or when sequencing multiple contactors to avoid short circuits between phases.","metaTitle":"Siemens 3RT1036-3BW40 SIRIUS Power Contactor, 41 A AC-4 at 4","metaDescription":"Siemens 3RT1036-3BW40 SIRIUS power contactor, size S2, 41 A AC-4 at 400 V, screw terminals, DIN rail mount, IP20 front. Current lifecycle stage. Sourced 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 ... 25 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":"1 000 1/h","at AC-2 maximum":"400 1/h","at AC-3 maximum":"800 1/h","at AC-4 maximum":"300 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":"30 kW","at 690 V rated value":"11.4 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"22 kW","at AC-4 at 400 V rated value":"41 A","Substance Prohibitance (Date)":"05/01/2012","at 40 °C minimum permissible":"16 mm²","at 60 °C minimum permissible":"16 mm²","Insulation Voltage Rated Value":"690 V","at 230 V at 60 °C rated value":"22 kW","at 690 V at 60 °C rated value":"66 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: 80 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: 160 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":"400 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=171321&mlfb=3RT1036-3BW40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1036-3BW40/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to 3RT1036-3BW40?","answer":"The closest functional second-source is the 3RT1036-1AB00, which is the same SIRIUS size S2 contactor but with a different coil voltage. The 3RT1036-3BW40 uses a different coil variant, so verify the coil voltage matches your control circuit before substituting. The main power ratings and terminal layout are identical."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1036-3BW40","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/3RT1036-3BW40 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}}