{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1056-2AT36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1056-2AT36","canonicalUrl":"https://aoctrl.com/siemens/3RT1056-2AT36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1056-2AT36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S6, 3RT1056-2AT36, 172 x 120 x 170 mm, spring-type terminals on magnet coil, 575-600 V AC coil, auxiliary switch included.","salesMarkdown":"## SIRIUS S6 power contactor — what you're looking at It carries a 575–600 V AC coil and includes an auxiliary switch block. The magnet coil terminates on spring-type terminals (2x 0.25–2.5 mm² solid or stranded), while the main power circuit accepts stranded conductors up to 120 mm². The contactor measures 172 mm high, 120 mm wide, and 170 mm deep — that's a substantial footprint for a size S6 frame. Mounting is by screw fixing (single 9 mm hole) on a vertical surface, with ±90° rotatability and ±22.5° tilt front-to-back. The spring-type terminals on the coil save wiring time — strip 8–10 mm, push in — but the main power terminals are screw-type for the 25–120 mm² stranded range. ## Duty cycle and switching frequency This contactor is rated for different switching frequencies depending on the duty category: 800 operations/hour in AC-1 (resistive), 750/h in AC-3 and AC-3e (motor starting/running), 300/h in AC-2 (slip-ring motors), and 130/h in AC-4 (plugging/inching). That means it's fine for high-cycle conveyor or pump starts (AC-3 at 750/h) but not for high-speed jogging — AC-4 at 130/h is the limit there. ## Auxiliary contact capacity The built-in auxiliary switch is rated at 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, and 1 A at 110 V — all AC rated values. That covers most PLC input or relay coil loads in a 24 VDC control circuit, but at 110 V the 1 A limit means you can't drive multiple contactor coils from one auxiliary contact.","metaTitle":"Siemens 3RT1056-2AT36 SIRIUS Power Contactor, S6, 120mm wide","metaDescription":"Siemens SIRIUS power contactor 3RT1056-2AT36, size S6, 172x120x170 mm, spring-type terminals, 575-600 V coil, aux switch included. Current lifecycle stage. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"170 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"120 mm","at AC":"40 ... 60 ms","at DC":"40 ... 60 ms","title":"3RT1056-2AT36","Height":"172 mm","Upwards":"10 mm","Forwards":"20 mm","Stranded":"25 ... 120 mm²","at 50 Hz":"0.8","at 60 Hz":"0.8","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"10 mm","Rated Value":"575 ... 600 V","description":"power contactor, AC-3e/AC-3 185 A, 90 kW / 400 V AC (50-60 Hz) / DC Uc: 575-600 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":"800 1/h","at AC-2 maximum":"300 1/h","at AC-3 maximum":"750 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":"750 1/h","Diameter Of Holes":"9 mm","Mounting Position":"with vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back","Size Of Contactor":"S6","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":"30 hp","at 400 V rated value":"3 A","at 440 V rated value":"1.4 A","at 480 V rated value":"180 A","at 50 Hz rated value":"575 ... 600 V","at 500 V rated value":"2 A","at 60 Hz rated value":"575 ... 600 V","at 600 V rated value":"192 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","at 1000 V rated value":"90 kW","For Auxiliary Contacts":"24 ... 14","Width Of Connection Bar":"17 mm","For Main Current Circuit":"Connection bar","at 200/208 V rated value":"60 hp","at 220/230 V rated value":"75 hp","at 460/480 V rated value":"150 hp","at 575/600 V rated value":"200 hp","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"8 kV","Thickness Of Connection Bar":"3 mm","at AC-3 rated value maximum":"1 000 V","at AC in hot operating state":"39 W","at AC-3e rated value maximum":"1 000 V","at AC-4 at 400 V rated value":"160 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"05/01/2012","Design Of The Surge Suppressor":"with varistor","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"189 A","at AC-5b up to 400 V rated value":"153 A","For Auxiliary And Control Circuit":"spring-loaded terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 315 A (690 V, 100 kA), aM: 200 A (690 V, 50 kA), BS88: 315 A (415 V, 50 kA)","Without Load Current Share Typical":"5.2 W","closing power of magnet coil at DC":"360 W","holding power of magnet coil at DC":"5.2 W","At Contactor For Auxiliary Contacts":"Spring-type terminals","With Type Of Coordination 1 Required":"gG: 355 A (690 V, 100 kA)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"13 W","for AWG cables for auxiliary contacts":"2x (24 ... 14)","number of NO contacts for main contacts":"3","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"2x (0.25 ... 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":"2 900 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"2 084 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"1 480 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"968 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"801 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":"95 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/48191814343ef1de12d436857500061f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=526542&mlfb=3RT1056-2AT36"},"ai":{"faq":[{"question":"What is the depth of 3RT1056-2AT36?","answer":"The depth is 170 mm, with a width of 120 mm and height of 172 mm."},{"question":"What wire sizes does the coil terminal accept?","answer":"The spring-type coil terminals accept 2x (0.25–2.5 mm²) solid or stranded conductors."},{"question":"Where can I buy 3RT1056-2AT36 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1056-2AT36","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/3RT1056-2AT36 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}}