{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2036-3KB44-3MA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2036-3KB44-3MA0","canonicalUrl":"https://aoctrl.com/siemens/3RT2036-3KB44-3MA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2036-3KB44-3MA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS coupling contactor, 3RT2036-3KB44-3MA0, S2 frame, 24 VDC coil, spring-type terminals, 55 mm width, 178 mm depth.","salesMarkdown":"The Siemens 3RT2036-3KB44-3MA0 is a SIRIUS coupling contactor in the S2 frame size, designed for applications where a main contactor needs to be electrically isolated from the control circuit — typically used to switch loads like motors or heaters in a panel while keeping the coil circuit separate for safety or logic reasons. Spring-type terminals (cage clamp) on the magnet coil and main contacts accept 2x (0.5... 2.5 mm²) solid or stranded, which matches standard control wiring practice and eliminates the need for ferrule tightening checks during commissioning. The contactor measures 55 mm wide by 114 mm high by 178 mm deep, and mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715. Main contacts rated for 18 A operational current in AC-3 duty, with 1 A minimum switching capability. Switching frequency: 1 000 cycles/h at AC-1, 800 at AC-3, 600 at AC-2, 250 at AC-4. ## Auxiliary contact ratings — what the voltage/current table tells you This contactor variant ships without an auxiliary switch block (auxiliary switch: no), but the auxiliary contact ratings are listed for when a block is added. At 24 V rated value, the auxiliary contacts carry 6 A; at 48 V, 2 A; at 60 V, 2 A; at 110 V, 1 A; at 125 V, 0.9 A; at 220 V, 0.3 A; at 400 V, 3 A; at 440 V, 0.6 A. The 230 V rating is given as 10 hp, which is a motor load rating for the auxiliary contacts — unusual for auxiliaries, so verify the application before using them for motor switching. The 400 V 3 A rating is notable: it suggests the auxiliary contacts can handle a moderate inductive load at line voltage, useful for piloting another contactor coil.","metaTitle":"Siemens 3RT2036-3KB44-3MA0 SIRIUS Coupling Contactor, 24 VDC","metaDescription":"Siemens SIRIUS 3RT2036-3KB44-3MA0 coupling contactor, 24 VDC coil, S2 frame, spring-type terminals, 55 mm wide, 178 mm deep. Sourced to order; confirm current pricing and availabil","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"178 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":"Spring-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":"No","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 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Inrush Current Peak":"2.6 A","Product Designation":"Coupling contactor","at 24 V rated value":"6 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":"spring-loaded 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":"Spring-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 ... 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)","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 %","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","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 / Q600","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":"2","number of NO contacts for auxiliary contacts instantaneous contact":"2","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":"https://cdn.aoctrl.com/5a3d20b47962e8a1c1f0ed73e50dde4c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=578160&mlfb=3RT2036-3KB44-3MA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2036-3KB44-3MA0/alternatives.json"},"ai":{"faq":[{"question":"What is the depth and width of this contactor?","answer":"The depth is 178 mm and the width is 55 mm, with a height of 114 mm."},{"question":"What coil voltage does 3RT2036-3KB44-3MA0 use?","answer":"The coil is rated at 24 VDC, with an inrush current peak of 2.6 A and a holding current of 6 A at rated voltage."},{"question":"What type of terminals does this contactor have?","answer":"The magnet coil and main contacts use spring-type terminals (cage clamp), accepting 2x (0.5... 2.5 mm²) solid or stranded conductors."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2036-3KB44-3MA0","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/3RT2036-3KB44-3MA0 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}}