{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2036-1KB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2036-1KB40","canonicalUrl":"https://aoctrl.com/siemens/3RT2036-1KB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2036-1KB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS coupling contactor, S2 frame, 24 VDC coil, screw-type terminals, 3RT2036-1KB40.","salesMarkdown":"The Siemens 3RT2036-1KB40 is a SIRIUS coupling contactor in the S2 frame size — a compact, screw-terminal device rated for switching auxiliary and control circuits, not main motor power. It carries 18 normally-open and 1 normally-closed main contact configuration, so it's built for interposing or signal-level coupling between a PLC output and a larger contactor coil or indicator load. The 24 VDC coil holds at 0.8× rated voltage and picks up reliably at 1.2× rated, with dropout below approximately 19.2 V — standard SIRIUS coil behaviour that matches the rest of the 3RT2 family. Mounting is screw-and-snap-on to 35 mm DIN rail per DIN EN 60715, with the mounting position allowing ±180° rotation on a vertical surface and ±22.5° tilt forward/backward — flexible for tight enclosures. Dimensions are 114 mm high, 55 mm wide, 130 mm deep, placing it in the standard S2 footprint that shares panel cutouts with the 3RT2036-1AC20-ZX95 and other S2-frame siblings. The auxiliary contact switching capacity is rated per voltage: 10 A at 24 V DC, 2 A at 48 V and 60 V DC, 1 A at 110 V DC, 0.9 A at 125 V DC, 0.3 A at 220 V DC, and 3 A at 400 V AC. This means the contactor can handle typical PLC-level loads (24 VDC relays, indicator lamps) at the full 10 A, but derates significantly at higher DC voltages — a 220 VDC solenoid would be limited to 0.3 A. The AC-1 maximum operating frequency is 1,000 cycles per hour, dropping to 250 cycles per hour at AC-4 (plugging/reversing duty). Coil inrush peaks at 2.6 A, with arcing time of 10 to 20 ms and DC operating time of 30 to 55 ms — fast enough for most interposing applications but not for high-speed synchronous switching. The screw-type terminals accept 2×(0.5 to 1.5 mm²) or 2×(0.75 to 2.5 mm²) solid or stranded wire, which covers standard control wiring up to 14 AWG. ## Panel integration — clearances and environment Clearance requirements: 10 mm upward and forward, 10 mm downward, 6 mm at the side — tight enough for dense DIN-rail layouts. The part includes an auxiliary switch block (factory-fitted) and carries the SIRIUS brand designation typical of Siemens' modular contactor family.","metaTitle":"Siemens 3RT2036-1KB40 SIRIUS Coupling Contactor, 24 VDC Coil","metaDescription":"Siemens 3RT2036-1KB40 SIRIUS coupling contactor, S2 frame, 24 VDC coil, screw terminals. 18...1 main contacts, 10 A at 24 VDC auxiliary switching. DIN rail snap-on. Current product","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"130 mm","Width":"55 mm","at DC":"30 ... 55 ms","Height":"114 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","Arcing Time":"10 ... 20 ms","At The Side":"6 mm","Rated Value":"24 V","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","at AC-1 maximum":"1 000 1/h","at AC-2 maximum":"600 1/h","at AC-3 maximum":"800 1/h","at AC-4 maximum":"250 1/h","lifecycle_stage":"current","Auxiliary Switch":"Yes","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715","Full-Scale Value":"1.2","at AC-3e maximum":"800 1/h","For Main Contacts":"18 ... 1","Mounting Position":"+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface","Size Of Contactor":"S2","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Inrush Current Peak":"2.6 A","Product Designation":"Coupling contactor","at 24 V rated value":"10 A","at 48 V rated value":"2 A","at 60 V rated value":"2 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 125 V rated value":"0.9 A","at 220 V rated value":"0.3 A","at 230 V rated value":"10 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.6 A","at 480 V rated value":"52 A","at 500 V rated value":"2 A","at 600 V rated value":"52 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Auxiliary Contacts":"20 ... 14","For Main Current Circuit":"screw-type terminals","at 110/120 V rated value":"3 hp","at 200/208 V rated value":"15 hp","at 220/230 V rated value":"15 hp","at 460/480 V rated value":"40 hp","at 575/600 V rated value":"50 hp","Locked-Rotor Current Peak":"2.1 A","Relative Humidity Minimum":"10 %","Holding Current Mean Value":"40 mA","Of Main Circuit Rated Value":"6 kV","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"12 W","at AC-2 at 400 V rated value":"22 kW","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"41 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"10/01/2014","Design Of The Surge Suppressor":"with varistor","Duration Of Inrush Current Peak":"50 µs","Locked-Rotor Current Mean Value":"0.9 A","Duration Of Locked-Rotor Current":"230 ms","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"61.6 A","at AC-5b up to 400 V rated value":"41.5 A","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 80A (690V,100kA), aM: 50A (690V,100kA), BS88: 63A (415V,80kA)","Without Load Current Share Typical":"1 W","closing power of magnet coil at DC":"21.5 W","holding power of magnet coil at DC":"1 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","With Type Of Coordination 1 Required":"gG: 160 A (690 V, 100 kA), aM: 80 A (690 V, 100 kA), BS88: 125 A (415 V, 80 kA)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"4 W","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","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)","mirror contact according to IEC 60947-4-1":"Yes","with low demand rate according to SN 31920":"40 %","with high demand rate according to SN 31920":"73 %","Type Of Voltage Of The Control Supply Voltage":"DC","Limited To 1 S Switching At Zero Current Maximum":"937 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"697 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"468 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"282 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"229 A; Use minimum cross-section acc. to AC-1 rated value","contact rating of auxiliary contacts according to UL":"A600 / P600","Of Main Circuit With Degree Of Pollution 3 Rated Value":"690 V","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","Of Auxiliary Circuit With Degree Of Pollution 3 Rated Value":"690 V","For Short-Circuit Protection Of The Auxiliary Switch Required":"gG: 10 A (500 V, 1 kA)","minimum cross-section in main circuit at maximum AC-1 rated value":"25 mm²","number of NC contacts for auxiliary contacts instantaneous contact":"1","number of NO contacts for auxiliary contacts instantaneous contact":"1","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$71.00","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e090e0684108315bbf197290a73e6e01.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=578155&mlfb=3RT2036-1KB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2036-1KB40/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RT2036-1KB40?","answer":"The part is sourced to order through independent distribution; submit an RFQ for current pricing and availability confirmation at quote time."},{"question":"What is the closest functional second-source for 3RT2036-1KB40?","answer":"The 3RT2036-1AC20-ZX95 is a peer S2-frame SIRIUS coupling contactor that shares the same mounting footprint, coil voltage family, and terminal layout — a direct drop-in for panels originally specified around that variant, though the auxiliary contact configuration and coil termination may differ."},{"question":"Will 3RT2036-1KB40 drop into a panel specified around 3RT2036-1AC20-ZX95?","answer":"Yes, both are S2-frame SIRIUS contactors with the same DIN-rail mounting, footprint, and screw-terminal block — no rewiring needed for the panel cutout or rail position."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2036-1KB40","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/3RT2036-1KB40 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}}