{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1055-2AR36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1055-2AR36","canonicalUrl":"https://aoctrl.com/siemens/3RT1055-2AR36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1055-2AR36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S6, order code 3RT1055-2AR36, 440-480 V AC coil, screw fixing, 170 mm depth, 120 mm width, 172 mm height.","salesMarkdown":"It carries a 440-480 V AC coil, so it pulls in reliably on standard 400-480 V three-phase control transformers common across European and North American line voltages. The screw-fixing mount and the ±90° rotatable, ±22.5° tiltable vertical mounting surface give panel builders flexibility when laying out a crowded enclosure — you can orient the contactor to fit cable entry or busbar runs without a special adapter plate. The S6 frame is Siemens' designation for a contactor body that handles the mechanical and thermal demands of switching loads up to the AC-3 duty cycle ratings. The 440-480 V coil means this contactor is not for 24 VDC or 110 VAC control circuits — it is sized specifically for higher-voltage control schemes, common where the control transformer feeds directly from the line side of a motor starter. The 170 mm depth and 172 mm height with 120 mm width define the panel footprint: at 170 mm deep, it needs a back-panel clearance of roughly 200 mm to the enclosure door for arc-flash and wiring bend radius. The solid conductor range of 2x 0.25-2.5 mm² on the coil terminals is fine for standard control wiring; the main power terminals accept stranded 25-120 mm², which covers the cable sizes for motor circuits up to the S6 current rating. Mounting is by screw fixing — no DIN-rail clip on this S6 frame, so plan for four M6 or M8 bolts into a backplate. The auxiliary switch is included — no separate add-on needed for basic status feedback. The spring-type coil terminals accept the 0.25-2.5 mm² solid or stranded control wiring without needing a screwdriver for the coil connection.","metaTitle":"Siemens 3RT1055-2AR36 SIRIUS Power Contactor, S6, 440-480 V","metaDescription":"Siemens 3RT1055-2AR36 SIRIUS power contactor, size S6, 440-480 V AC coil, screw fixing, 170 mm depth. Current lifecycle stage. Sourced to order against RFQ.","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":"3RT1055-2AR36","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":"440 ... 480 V","description":"power contactor, AC-3e/AC-3 150 A, 75 kW / 400 V AC (50-60 Hz) / DC Uc: 440-480 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":"156 A","at 50 Hz rated value":"440 ... 480 V","at 500 V rated value":"2 A","at 60 Hz rated value":"440 ... 480 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":"24 ... 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":"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)","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":"9 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":"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":"$240.03","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=405699&mlfb=3RT1055-2AR36"},"ai":{"faq":[{"question":"What are the key dimensions of 3RT1055-2AR36?","answer":"The contactor measures 170 mm depth, 120 mm width, and 172 mm height."},{"question":"What coil voltage does 3RT1055-2AR36 use?","answer":"The coil is rated for 440-480 V AC, so it is designed for higher-voltage control circuits, not 24 VDC or 110 VAC."},{"question":"Will 3RT1055-2AR36 drop into a panel specified for 3RT1055-1AB36?","answer":"The mechanical footprint (S6 frame, screw fixing, same mounting clearances) is identical, but the coil voltage differs: this is 440-480 V AC versus the 1AB36's DC coil. If the panel's control transformer supplies AC at that voltage, it fits without rewiring; if the panel uses DC control, it will not pull in."},{"question":"How do I get current pricing and availability for 3RT1055-2AR36?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1055-2AR36","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/3RT1055-2AR36 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}}