{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1275-6NF36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1275-6NF36","canonicalUrl":"https://aoctrl.com/siemens/3RT1275-6NF36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1275-6NF36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1275-6NF36 vacuum contactor, Size S12, 96-127 VAC coil, screw-type terminals, 214 x 160 x 225 mm, screw fixing.","salesMarkdown":"## Vacuum arc chamber — what it changes for the panel The 3RT1275-6NF36: This is a vacuum contactor, not an air-break design. The arc extinguishes in a sealed chamber, so there is no visible contact erosion and no arc chute to clean. Electrical life is typically an order of magnitude higher than an equivalent air-break contactor in the same frame size — relevant for high-cycle applications like crane duty or compressor cycling. Part of the SIRIUS family, Siemens' modular contactor platform for motor control centers and distribution panels. The Size S12 frame determines the panel cutout and mounting hole pattern — 214 mm height, 160 mm width, 225 mm depth. The 225 mm depth is the dimension to check against shallow enclosures. ## Coil and control circuit — 96-127 V wide-band The magnet coil is rated 96-127 V — a single winding that covers 110 V and 120 V control circuits without a tap change. Coil terminals are screw-type, so expect to torque down ring or fork terminals; no push-in or spring-cage on the coil circuit. These are the switching limits for the control circuit, not the main poles — the PLC output or relay feeding the contactor must be rated for the inrush, not just the sealed current. Switching frequency varies by duty class: 750 ops/h in AC-3 (motor starting) and AC-3e, 250 ops/h in AC-2 and AC-4. The AC-4 ceiling (plugging, inching) is the thermal limit of the contactor, not the coil — exceeding it shortens electrical life even if the coil holds in. ## Power terminals and mounting — screw-fixed, large cable range Main power terminals accept 70-240 mm² stranded cable — sized for high-current motor feeds. Mounting is screw fixing with 11 mm diameter holes — not DIN-rail snap-on. Minimum clearance: 10 mm upwards, downwards, and to the side; 20 mm forwards. The operating ceiling limits panel ambient near the contactor — if the enclosure internal temperature exceeds 60 °C, derate or add ventilation.","metaTitle":"Siemens 3RT1275-6NF36 SIRIUS Vacuum Contactor, Size S12","metaDescription":"Siemens 3RT1275-6NF36 SIRIUS vacuum contactor, Size S12, 96-127 VAC coil, screw terminals, 214x160x225 mm. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"225 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"160 mm","at AC":"80 ... 100 ms","at DC":"80 ... 100 ms","Height":"214 mm","Upwards":"10 mm","Forwards":"20 mm","Stranded":"70 ... 240 mm²","at 50 Hz":"0.4","at 60 Hz":"0.4","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"10 mm","Rated Value":"96 ... 127 V","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","Number Of Holes":"1","at AC-1 maximum":"700 1/h","at AC-2 maximum":"250 1/h","at AC-3 maximum":"750 1/h","at AC-4 maximum":"250 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":"11 mm","Mounting Position":"+/-22,5° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface; standing, on horizontal mounting surface","Size Of Contactor":"S12","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":"Vacuum 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":"6 A","at 400 V rated value":"3 A","at 480 V rated value":"361 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":"382 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","at 1000 V rated value":"560 kW","For Auxiliary Contacts":"18 ... 14","Width Of Connection Bar":"25 mm","For Main Current Circuit":"Connection bar","at 200/208 V rated value":"125 hp","at 220/230 V rated value":"150 hp","at 460/480 V rated value":"300 hp","at 575/600 V rated value":"400 hp","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"8 kV","Thickness Of Connection Bar":"6 mm","at AC-3 rated value maximum":"1 000 V","at AC in hot operating state":"63 W","at AC-3e rated value maximum":"1 000 V","at AC-4 at 400 V rated value":"350 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","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 800 A (690 V, 50 kA), aM: 630 A (690 V, 50 kA), BS88: 800 A (415 V, 50 kA)","Without Load Current Share Typical":"3.6 W","closing power of magnet coil at DC":"800 W","holding power of magnet coil at DC":"3.6 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","With Type Of Coordination 1 Required":"gG: 800 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":"21 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","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":"370 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/61252a668fcbdbe9c10623fb44ee182c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=149118&mlfb=3RT1275-6NF36","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1275-6NF36/alternatives.json"},"ai":{"faq":[{"question":"What are the main power terminal cable sizes for this contactor?","answer":"Main power terminals accept 70-240 mm² stranded cable."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1275-6NF36","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/3RT1275-6NF36 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}}