{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1055-6AS36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1055-6AS36","canonicalUrl":"https://aoctrl.com/siemens/3RT1055-6AS36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1055-6AS36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, Size S6, order code 3RT1055-6AS36, 120 mm width, 172 mm height, 170 mm depth, screw fixing, auxiliary switch included.","salesMarkdown":"It is a screw-fixed device rated for a vertical mounting surface, rotatable ±90° and tiltable ±22.5° front-to-back, which gives panel builders flexibility in enclosure layout. The main power terminals accept stranded conductors from 25 to 120 mm², while the auxiliary circuit terminals accept solid or stranded wire from 0.5 to 4 mm². The AC-3 switching rate is 750 operations per hour maximum, and the AC-3e rating matches that figure — this is the duty cycle for standard squirrel-cage motor starting. For resistive loads (AC-1), the rate is 800 ops/h. For the most severe duty, AC-4 (plugging, inching, reversing), the rate drops to 130 ops/h, reflecting the higher thermal stress on the contacts during those operations. The auxiliary contact is rated for 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, and 1 A at 110 V — these are the switching capacities for the control circuit, not the main power path. The rated coil voltage is 500 to 550 V, and the power factor at both 50 Hz and 60 Hz is 0.8. Dimensions are 120 mm width, 172 mm height, and 170 mm depth. The contactor is screw-fixed, not DIN-rail mounted. A single 9 mm diameter mounting hole is provided. The Size S6 frame means this is a physically large contactor — verify the enclosure depth can accommodate the 170 mm projection plus the 20 mm forward clearance before panel layout is finalized.","metaTitle":"Siemens 3RT1055-6AS36 SIRIUS Power Contactor, Size S6, 120mm","metaDescription":"Siemens 3RT1055-6AS36 SIRIUS power contactor, Size S6, 120 mm width, 172 mm height, 170 mm depth. Active production. Screw fixing. Stranded 25-120 mm². Auxiliary switch included.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"170 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"120 mm","at AC":"40 ... 60 ms","at DC":"40 ... 60 ms","title":"3RT1055-6AS36","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":"500 ... 550 V","description":"power contactor, AC-3e/AC-3 150 A, 75 kW / 400 V AC (50-60 Hz) / DC Uc: 500-550 V 3-pole, auxiliary contacts 2 NO + 2 NC drive: conventional main circuit: busbar control and auxiliary circuit: screw terminal","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-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 (0,5 ... 1,5 mm²), 2x (0,75 ... 2,5 mm²), max. 2x (0,75 ... 4 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":"156 A","at 50 Hz rated value":"500 ... 550 V","at 500 V rated value":"2 A","at 60 Hz rated value":"500 ... 550 V","at 600 V rated value":"144 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","at 1000 V rated value":"90 kW","For Auxiliary Contacts":"18 ... 14","Width Of Connection Bar":"17 mm","For Main Current Circuit":"Connection bar","at 200/208 V rated value":"50 hp","at 220/230 V rated value":"60 hp","at 460/480 V rated value":"125 hp","at 575/600 V rated value":"150 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":"27 W","at AC-3e rated value maximum":"1 000 V","at AC-4 at 400 V rated value":"132 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":"162 A","at AC-5b up to 400 V rated value":"124 A","For Auxiliary And Control Circuit":"screw-type 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":"Screw-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":"9 W","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","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","Type Of Voltage Of The Control Supply Voltage":"AC/DC","Limited To 1 S Switching At Zero Current Maximum":"2 727 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"1 831 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"1 300 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"850 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"703 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=312878&mlfb=3RT1055-6AS36"},"ai":{"faq":[{"question":"What are the key dimensions for panel fit?","answer":"Width is 120 mm, height is 172 mm, depth is 170 mm. Clearance required: 10 mm upwards, 10 mm downwards, 10 mm at sides, 20 mm forwards."},{"question":"What wire sizes does this contactor accept?","answer":"Main power terminals accept stranded 25-120 mm². Auxiliary terminals accept solid or stranded 0.5-4 mm² (2x 0.5-1.5 mm², 2x 0.75-2.5 mm², max 2x 0.75-4 mm²)."},{"question":"What is the mechanical life rating?","answer":"Typical mechanical life is 10,000,000 operations."},{"question":"What is the operating temperature range?","answer":"Operating temperature is -25 to +60 °C; storage temperature is -55 to +80 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1055-6AS36","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/3RT1055-6AS36 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}}