{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1036-3BF40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1036-3BF40","canonicalUrl":"https://aoctrl.com/siemens/3RT1036-3BF40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1036-3BF40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S2 power contactor, 3RT1036-3BF40, screw-type terminals, 41 A AC-4 at 400 V, 22 kW AC-2, 110 V coil, DIN rail mount.","salesMarkdown":"## SIRIUS S2 power contactor — 3RT1036-3BF40 The Siemens 3RT1036-3BF40 is a SIRIUS S2 power contactor rated for motor switching in AC-4 duty at 41 A on a 400 V line — that is the full-load current it can break under the hardest motor-start category (plugging, inching, reversing). For AC-2 duty (slip-ring motors, wound-rotor starting) it carries 22 kW at 400 V. At 500 V it handles 30 kW; at 690 V it drops to 11.4 kW. The coil pulls 110 V AC/DC. On the DC side the pick-up time runs 20–25 ms and the arcing time 10–15 ms — fast enough for most reversing or jogging circuits. Snaps onto 35 mm DIN rail per EN 50022; screw-type terminals on the main circuit accept solid 2x (0.25–2.5 mm²) or stranded 2x (0.75–25 mm²). Side-by-side mounting is allowed — no derating gap needed for the mechanical stack. ## Switching frequency and thermal limits Maximum switching rate at AC-1 (resistive load) is 1,000 cycles/hour. AC-3 (standard squirrel-cage motor start/run) allows 800 cycles/hour; AC-4 (plugging/reversing) drops to 300 cycles/hour. AC-2 sits at 400 cycles/hour. The contactor is rated for a 1.1× overload factor (full-scale 1.1) and a minimum permissible conductor cross-section of 16 mm² at 40 °C. ## DC switching capability For DC loads the contactor breaks 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, 6 A at 230 V, and 3 A at 400 V. These are the DC-1 ratings — resistive DC loads, not motor or inductive. RoHS compliance date (substance prohibition) is May 1, 2012 — the part has been fully RoHS-compliant since that date. The SIRIUS series typically carries CE, UL, CSA, and IEC certifications; verify specific approvals against the nameplate for your jurisdiction. This is a standard DIN-rail contactor on a 55 mm wide S2 frame, 112 mm tall, 130 mm deep. It drops into any panel with 35 mm rail and clearance for the depth — no special bracket or adapter needed.","metaTitle":"Siemens 3RT1036-3BF40 SIRIUS Power Contactor, 41 A AC-4 at 4","metaDescription":"Siemens 3RT1036-3BF40 SIRIUS S2 power contactor. 41 A AC-4 at 400 V, 22 kW AC-2. Screw terminals, DIN rail mount. Active production. 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 ... 25 ms","Height":"112 mm","Stranded":"2x (0.75 ... 25 mm²)","Arcing Time":"10 ... 15 ms","Rated Value":"110 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=204504&mlfb=3RT1036-3BF40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1036-3BF40/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to 3RT1036-3BF40?","answer":"The 3RT1044-1FB46 is a higher-current SIRIUS contactor but on a larger frame — it will not drop into the same DIN-rail footprint without panel rework. The 3RT5036-1AP00 is a different series (SIRIUS 3RT5) with similar ratings but different accessory compatibility. For a direct fit, stick with the 3RT1036-3BF40."},{"question":"What compliance documentation does 3RT1036-3BF40 carry?","answer":"RoHS compliant since May 1, 2012. The SIRIUS series typically holds CE, UL, CSA, and IEC 60947-4-1 certifications. Verify the specific approvals on the unit nameplate for your project requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1036-3BF40","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/3RT1036-3BF40 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}}