{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1055-1AF36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1055-1AF36","canonicalUrl":"https://aoctrl.com/siemens/3RT1055-1AF36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1055-1AF36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1055-1AF36, S6 frame size, 110-127 V AC coil, screw-type terminals, vertical mounting.","salesMarkdown":"## SIRIUS S6 Power Contactor, 110–127 VAC Coil The coil is wound for 110–127 V AC, which places it in the standard control-voltage range common across European and North American 120 V control circuits. Screw-type coil terminals and a screw-fixing mounting method mean it integrates into a conventional panel without special tooling. The S6 frame is the physical envelope that determines panel cutout and bus-bar spacing — the 3RT1055-1AF36 occupies a 120 mm width, 172 mm height, and 170 mm depth. Power wiring accepts stranded conductors from 16 to 70 mm², sized for the main circuit of a motor branch. The auxiliary contact block, included as standard, carries a 10 A rating at 24 V, derating to 0.3 A at 220 V — these are the figures that govern control-circuit interface with a PLC output or relay. ## Switching Duty and Thermal Limits Mechanical life is typical at 10 million operations. Switching frequency varies by duty: AC-1 (resistive) max 800 cycles/hour, AC-3 (motor starting) max 750 cycles/hour, AC-4 (plugging/inching) max 130 cycles/hour. These numbers govern how tightly the contactor can be packed next to other devices or enclosure walls.","metaTitle":"Siemens 3RT1055-1AF36 SIRIUS Power Contactor, 110-127 VAC Co","metaDescription":"Siemens 3RT1055-1AF36 SIRIUS power contactor. S6 frame, 110-127 VAC coil, screw terminals. Rated for motor switching duty. Sourced to order, quoted on request.","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":"3RT1055-1AF36","Height":"172 mm","Upwards":"10 mm","Forwards":"20 mm","Stranded":"16 ... 70 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":"110 ... 127 V","description":"power contactor, AC-3e/AC-3 150 A, 75 kW / 400 V AC (50-60 Hz) / DC Uc: 110-127 V 3-pole, auxiliary contacts 2 NO + 2 NC drive: conventional main circuit: box terminal control and auxiliary circuit: screw terminal","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","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","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":"110 ... 127 V","at 500 V rated value":"2 A","at 60 Hz rated value":"110 ... 127 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","For Main Current Circuit":"box terminal","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","Safety-Related Switching On":"Yes","at AC-3 rated value maximum":"1 000 V","at AC in hot operating state":"27 W","at AC-2 at 400 V rated value":"75 kW","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)","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","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 (0.5 ... 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","Finely Stranded Without Core End Processing":"16 ... 70 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":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=689418&mlfb=3RT1055-1AF36"},"ai":{"faq":[{"question":"What are the key ratings for 3RT1055-1AF36?","answer":"The 3RT1055-1AF36 is a SIRIUS power contactor with a 110–127 V AC coil, S6 frame size, screw-type terminals, and an integrated auxiliary switch. Power wiring accepts 16–70 mm² stranded."},{"question":"Where can I buy 3RT1055-1AF36 and how is it quoted?","answer":"This part is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for your volume and delivery requirements."},{"question":"What is the depth of 3RT1055-1AF36?","answer":"The depth is 170 mm. Combined with the 120 mm width and 172 mm height, this defines the panel footprint for the S6 frame."},{"question":"Does 3RT1055-1AF36 include an auxiliary contact?","answer":"Yes, the auxiliary switch is included as standard. The auxiliary contact ratings range from 10 A at 24 V down to 0.3 A at 220 V."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1055-1AF36","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/3RT1055-1AF36 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}}