{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1055-6NP36-3PA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1055-6NP36-3PA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1055-6NP36-3PA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1055-6NP36-3PA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, Size S6, 3RT1055-6NP36-3PA0, 200-277 V AC coil, screw-type terminals, screw fixing, 25-120 mm² main conductor cross-section.","salesMarkdown":"## SIRIUS Size S6 Power Contactor — 200-277 V Coil, Screw Fixing The coil is rated 200-277 V AC, so it lands squarely on standard three-phase control transformers without needing an intermediate relay. Screw fixing to the mounting plate and screw-type coil terminals keep wiring straightforward for panel builders. Main power circuit accepts stranded conductors from 25 to 120 mm², sized for the S6 frame's typical motor currents. Auxiliary switch is included on the unit, with its own screw terminals accepting 2x (0.5-1.5 mm²) solid, 2x (0.75-2.5 mm²) solid, or up to 2x (0.75-4 mm²) stranded — enough for control-wire terminations without a separate terminal block. ## Duty Ratings and Switching Frequency The contactor's operating life and thermal limits depend on the duty class. At AC-3 (squirrel-cage motor starting) it manages up to 750 switching cycles per hour; at AC-4 (plugging/reversing/inching) that drops to 130 cycles per hour. AC-1 resistive loads allow 800 cycles per hour. Operate time is 80-90 ms on both AC and DC coil supplies, and arcing time runs 10-15 ms. The power factor at 50 Hz and 60 Hz is 0.6, which matters when sizing control transformers for a bank of contactors. Dimensions are 172 mm height, 120 mm width, 170 mm depth. Four mounting holes at 9 mm diameter on a single-hole pattern per pole. The built-in auxiliary switch is rated 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, and 1 A at 110 V. These are the figures to check when the auxiliary feeds a PLC input or a pilot light — the 24 V rating is generous, but the 110 V rating drops to 1 A, so a multi-lamp indication circuit could exceed it.","metaTitle":"Siemens 3RT1055-6NP36-3PA0 SIRIUS Power Contactor, Size S6,","metaDescription":"Siemens SIRIUS 3RT1055-6NP36-3PA0 power contactor, Size S6, 200-277V AC coil, screw fixing, 25-120 mm² main circuit. Current lifecycle stage. Available to order.","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":"80 ... 90 ms","at DC":"80 ... 90 ms","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":"200 ... 277 V","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":"200 ... 277 V","at 500 V rated value":"2 A","at 60 Hz rated value":"200 ... 277 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","Safety-Related Switching On":"No","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-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":"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":"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","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","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,"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=650655&mlfb=3RT1055-6NP36-3PA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1055-6NP36-3PA0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RT1055-6NP36-3PA0?","answer":"Submit an RFQ through this listing. Availability and current pricing are confirmed at quote time through independent distribution channels."},{"question":"What is 3RT1055-6NP36-3PA0's listed depth?","answer":"The depth is 170 mm."},{"question":"What wire sizes does the auxiliary terminal accept?","answer":"The auxiliary switch terminals accept 2x (0.5-1.5 mm²) solid, 2x (0.75-2.5 mm²) solid, or up to 2x (0.75-4 mm²) stranded."},{"question":"Will 3RT1055-6NP36-3PA0 drop into a panel specified around 3RT1055-6QF35 without rewiring?","answer":"Both are Size S6 SIRIUS contactors with screw fixing and the same 172 x 120 x 170 mm footprint, so the mechanical swap is direct. The coil voltage differs — this unit is 200-277 V AC versus the 6QF35's coil — so verify the control transformer matches before installing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1055-6NP36-3PA0","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/3RT1055-6NP36-3PA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}