{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1036-3XB40-0LA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1036-3XB40-0LA2","canonicalUrl":"https://aoctrl.com/siemens/3RT1036-3XB40-0LA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1036-3XB40-0LA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, Size S2, 3RT1036-3XB40-0LA2, 30 kW at 500 V AC-3, 24 V DC coil, screw terminals, 142 x 55 x 130 mm.","salesMarkdown":"## SIRIUS Size S2 Power Contactor, 30 kW at 500 V The Siemens SIRIUS 3RT1036-3XB40-0LA2 is a Size S2 power contactor rated for 30 kW at 500 V in AC-3 duty — the motor-switching curve that governs most induction-motor loads up to that power. The 24 V DC coil pulls in at 0.7x rated (about 16.8 V) and drops out with a 20–25 ms delay, which is long enough to ride through brief sags but fast enough to clear a fault before the main breaker reacts. ## Duty Ratings and Switching Frequency This contactor carries separate switching-frequency limits per duty class: 1 000 cycles/hour at AC-1 (resistive), 800 at AC-3 (motor start/run), 400 at AC-2 (slip-ring motor), and 300 at AC-4 (plugging/inching). At 400 V AC-2 the unit is rated for 22 kW, and at 690 V AC-3 it delivers 11.4 kW. The arcing time of 10–15 ms is consistent across these loads, which helps when coordinating with upstream short-circuit protection. The 55 mm width and 142 mm height fit a standard 8-module DIN-rail footprint, leaving room for a thermal overload relay alongside.","metaTitle":"Siemens 3RT1036-3XB40-0LA2 SIRIUS Power Contactor, Size S2,","metaDescription":"Siemens SIRIUS 3RT1036-3XB40-0LA2 power contactor, Size S2, 30 kW AC-3 at 500 V, 24 V DC coil, screw terminals, current lifecycle stage, available 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":"142 mm","Upwards":"10 mm","Forwards":"10 mm","Stranded":"2x (0.75 ... 25 mm²)","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"10 mm","Rated Value":"24 V","Initial Value":"0.7","During Storage":"-55 ... +80 °C","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":"-40 ... +70 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Full-Scale Value":"1.25","Size Of Contactor":"S2","Solid Or Stranded":"2x (0.75 ... 16 mm²)","Product Brand Name":"SIRIUS","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","Instantaneous Contact":"0","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at maximum AC-1 rated value":"16 mm²","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","Design Of The Surge Suppressor":"with varistor","at AWG cables for main contacts":"2x (18 ... 2)","For Auxiliary And Control Circuit":"spring-loaded terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"fuse gL/gG: 80 A","closing power of magnet coil at DC":"15 W","holding power of magnet coil at DC":"11 W","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","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Type Of Voltage Of The Control Supply Voltage":"DC","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","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=103738&mlfb=3RT1036-3XB40-0LA2","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1036-3XB40-0LA2/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RT1036-3XB40-0LA2?","answer":"The 3RT1044-1FB46 is a larger-frame SIRIUS contactor (Size S3 vs S2) with a higher current rating — it will not drop into the same panel footprint without rewiring and resizing the enclosure. The 3RT5036-1AP00 and 3RT5034-1BW40 are from the SIRIUS 3RT5 series with different coil voltages and terminal styles; verify the coil voltage and mounting rail compatibility before substituting."},{"question":"Where can I buy 3RT1036-3XB40-0LA2?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment."},{"question":"What are the key dimensions of 3RT1036-3XB40-0LA2?","answer":"Height 142 mm, width 55 mm, depth 130 mm. It mounts on 35 mm DIN rail per EN 50022 with 10 mm clearance on all sides."},{"question":"What wire sizes does the 3RT1036-3XB40-0LA2 accept?","answer":"Main circuit screw terminals accept 2x (0.75... 16 mm²) stranded; auxiliary terminals accept 2x (0.25... 2.5 mm²) solid or stranded."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1036-3XB40-0LA2","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/3RT1036-3XB40-0LA2 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}}