{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1055-2NF36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1055-2NF36","canonicalUrl":"https://aoctrl.com/siemens/3RT1055-2NF36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1055-2NF36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S6, 3RT1055-2NF36, 96-127 VAC coil, spring-type coil terminals, screw fixing, 170 mm depth.","salesMarkdown":"## Siemens SIRIUS 3RT1055-2NF36 — Size S6 Power Contactor The coil is rated for 96-127 V AC, and the coil terminals are spring-type — a detail that saves time during panel wiring since you don't need to torque screw terminals on the coil side. The main power terminals accept stranded conductors from 25 to 120 mm², which is typical for the S6 frame's current range. ## Duty Cycle and Switching Frequency The 3RT1055-2NF36 is rated for different maximum switching frequencies depending on the duty category: 800 operations per hour in AC-1 (resistive loads), 750 in AC-3 (standard motor starting), 300 in AC-2 (slip-ring motors), and 130 in AC-4 (plugging/inching). The AC-3e rating matches the AC-3 figure at 750 ops/h. These numbers tell you the thermal limit of the contactor under each duty — exceed them and you risk overheating the arc chamber. Mechanical life is typical at 10 million operations, which is standard for this class. ## Auxiliary Switch and Clearances The contactor comes with an auxiliary switch built in. Its rated values are 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, and 1 A at 110 V — these are the contact ratings for the auxiliary circuit, not the main power path. Keep these in mind when wiring the control circuit; the 10 A at 24 V is generous for PLC inputs or relay coils. The single mounting hole is 9 mm diameter. Overall dimensions are 172 mm high, 120 mm wide, and 170 mm deep.","metaTitle":"Siemens 3RT1055-2NF36 SIRIUS Power Contactor, S6, 96-127 VAC","metaDescription":"Siemens 3RT1055-2NF36 SIRIUS power contactor, size S6, 96-127 VAC coil, screw fixing, spring-type coil terminals. Rated for AC-1/AC-3/AC-4 duty cycles. Current production. Sourced","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":"80 ... 90 ms","at DC":"80 ... 90 ms","title":"3RT1055-2NF36","Height":"172 mm","Upwards":"10 mm","Forwards":"20 mm","Stranded":"25 ... 120 mm²","at 50 Hz":"0.6","at 60 Hz":"0.6","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"10 mm","Rated Value":"96 ... 127 V","description":"power contactor, AC-3e/AC-3 150 A, 75 kW / 400 V AC (50-60 Hz) / DC Uc: 96-127 V PLC input 24 V DC 3-pole, auxiliary contacts 2 NO + 2 NC drive: electronic 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":"96 ... 127 V","at 500 V rated value":"2 A","at 60 Hz rated value":"96 ... 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":"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":"2.8 W","closing power of magnet coil at DC":"320 W","holding power of magnet coil at DC":"2.8 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":"9 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","voltage at PLC-control input rated value":"24 V","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","type of PLC-control input according to IEC 60947-1":"Type 2","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","operating range factor of the voltage at PLC-control input":"0.8 ... 1.1","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=230626&mlfb=3RT1055-2NF36"},"ai":{"faq":[{"question":"Where can I buy the 3RT1055-2NF36 and get a price?","answer":"We can source the 3RT1055-2NF36 and provide a quote against an RFQ. Availability and current pricing are confirmed at the time of quotation — submit an RFQ for a firm price and lead time."},{"question":"What are the key specifications of the 3RT1055-2NF36?","answer":"It's a SIRIUS power contactor in size S6, with a 96-127 V AC coil, spring-type coil terminals, screw fixing, and main power terminals accepting 25-120 mm² stranded wire. Dimensions are 172 x 120 x 170 mm (H x W x D)."},{"question":"Will the 3RT1055-2NF36 drop into a panel specified for the 3RT1055-6QF35?","answer":"Both are S6 frame size contactors from the same SIRIUS family, so the mounting footprint and main power lug spacing are identical. The difference is the coil voltage — the 2NF36 is 96-127 V AC, while the 6QF35 has a different coil rating. Verify your control voltage before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1055-2NF36","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/3RT1055-2NF36 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}}