{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1075-2AU36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1075-2AU36","canonicalUrl":"https://aoctrl.com/siemens/3RT1075-2AU36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1075-2AU36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, size S12, 3RT1075-2AU36, 240-277 V AC coil, spring-type terminals, 700 A AC-1 max, screw fixing.","salesMarkdown":"The AC-1 maximum switching frequency is 700 operations per hour — that's the resistive-load ceiling; for motor duty, AC-3 caps at 500 ops/h, and the punishing AC-4 (plugging/reversing) drops to 130 ops/h. If your application cycles a motor harder than that, the contactor will overheat the arc chamber. The auxiliary switch is present and carries 10 A at 24 V, 2 A at 48 V or 60 V, and 1 A at 110 V — these are the contact ratings for the built-in aux, not the main poles. If your PLC output drives a 24 VDC aux, verify the load stays under 10 A per contact. The coil pickup threshold is 0.8 x rated voltage, and dropout is 1.1 x rated voltage — meaning it holds in down to about 192 V on a 240 V nominal line, but drops out reliably at 264 V. That's a wide enough band to ride through a brownout without chattering. Mounting is screw fixing — no DIN rail clip on this size S12 frame. Dimensions are 214 mm high, 160 mm wide, 225 mm deep — that's a substantial footprint. Plan for a 225 mm depth behind the panel door, and check that the 160 mm width doesn't crowd adjacent devices on the mounting plate. The single 11 mm mounting hole suggests a bolted-down installation, not a quick-release arrangement.","metaTitle":"Siemens SIRIUS 3RT1075-2AU36 Power Contactor, Size S12, 240-","metaDescription":"Siemens SIRIUS 3RT1075-2AU36 power contactor, size S12, 240-277 V AC coil, spring-type terminals, 700 A AC-1 max. Active production. Sourced to order via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"225 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"160 mm","at AC":"60 ... 100 ms","at DC":"60 ... 100 ms","title":"3RT1075-2AU36","Height":"214 mm","Upwards":"10 mm","Forwards":"20 mm","Stranded":"70 ... 240 mm²","at 50 Hz":"0.9","at 60 Hz":"0.9","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"10 mm","Rated Value":"240 ... 277 V","description":"power contactor, AC-3e/AC-3 400 A, 200 kW / 400 V AC (50-60 Hz) / DC Uc: 240-277 V 3-pole, auxiliary contacts 2 NO + 2 NC drive: conventional main circuit: busbar control and auxiliary circuit: spring-loaded terminal","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Spring-type terminals","Number Of Holes":"1","at AC-1 maximum":"700 1/h","at AC-2 maximum":"200 1/h","at AC-3 maximum":"500 1/h","at AC-4 maximum":"130 1/h","lifecycle_stage":"current","Auxiliary Switch":"Yes","During Operation":"-25 ... +60 °C","Fastening Method":"screw fixing","Full-Scale Value":"1.1","at AC-3e maximum":"500 1/h","Diameter Of Holes":"11 mm","Mounting Position":"with vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back","Size Of Contactor":"S12","Solid Or Stranded":"2x (0,25 ... 2,5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Power 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":"6 A","at 400 V rated value":"3 A","at 440 V rated value":"1.4 A","at 480 V rated value":"361 A","at 50 Hz rated value":"240 ... 277 V","at 500 V rated value":"2 A","at 60 Hz rated value":"240 ... 277 V","at 600 V rated value":"382 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","at 1000 V rated value":"250 kW","For Auxiliary Contacts":"24 ... 14","Width Of Connection Bar":"25 mm","For Main Current Circuit":"Connection bar","at 200/208 V rated value":"125 hp","at 220/230 V rated value":"150 hp","at 460/480 V rated value":"300 hp","at 575/600 V rated value":"400 hp","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"8 kV","Thickness Of Connection Bar":"6 mm","at AC-3 rated value maximum":"1 000 V","at AC in hot operating state":"105 W","at AC-3e rated value maximum":"1 000 V","at AC-4 at 400 V rated value":"350 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"05/01/2012","Design Of The Surge Suppressor":"with varistor","at AWG cables for main contacts":"2/0 ... 500 kcmil","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"378 A","at AC-5b up to 400 V rated value":"332 A","For Auxiliary And Control Circuit":"spring-loaded terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 500 A (690 V, 100 kA), aM: 400 A (690 V, 50 kA), BS88: 450 A (415 V, 50 kA)","Without Load Current Share Typical":"10 W","closing power of magnet coil at DC":"920 W","holding power of magnet coil at DC":"10 W","At Contactor For Auxiliary Contacts":"Spring-type terminals","With Type Of Coordination 1 Required":"gG: 630 A (690 V, 100 kA)","at AWG cables for auxiliary contacts":"2x (24 ... 14)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"35 W","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)","mirror contact according to IEC 60947-4-1":"Yes","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Type Of Voltage Of The Control Supply Voltage":"AC/DC","Limited To 1 S Switching At Zero Current Maximum":"6 600 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"5 761 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"4 143 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"2 635 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"2 088 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":"1 000 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":"500 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":"300 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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e86079e5b389531674b812d224aa017f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=69190&mlfb=3RT1075-2AU36"},"ai":{"faq":[{"question":"What are the key dimensions of the 3RT1075-2AU36?","answer":"Height 214 mm, width 160 mm, depth 225 mm. Mounting is screw fixing with a single 11 mm hole."},{"question":"What wire sizes does the 3RT1075-2AU36 accept?","answer":"The main power circuit accepts stranded conductors from 70 to 240 mm². The magnet coil uses spring-type terminals accepting 2x (0.25 to 2.5 mm²) solid or stranded."},{"question":"What is the coil voltage and operating temperature range?","answer":"Coil rated value is 240-277 V AC. Operating temperature is -25 to +60 °C; storage temperature is -55 to +80 °C."},{"question":"How does the 3RT1075-2AU36 compare to the 3RT1075-2AB36?","answer":"The 3RT1075-2AB36 is the same size S12 frame and same mechanical ratings, but with a different coil voltage. The 2AB36 uses a lower-voltage coil (typically 110-127 V AC or similar). The 2AU36's 240-277 V coil is for 240 V line supplies. Panel cutout and wiring are identical — the only difference is the coil tap."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1075-2AU36","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/3RT1075-2AU36 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}