{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1275-6LA06","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1275-6LA06","canonicalUrl":"https://aoctrl.com/siemens/3RT1275-6LA06","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1275-6LA06","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS vacuum contactor, size S12, order code 3RT1275-6LA06, rated 361 A at 480 V AC-3, screw fixing, 225 mm depth.","salesMarkdown":"The 361 A at 480 V AC-3 rating is the figure that governs motor load fit — a 480 V motor drawing, say, 320 A full-load current is within range; a 380 A motor would exceed the contactor's rated making and breaking capacity in that duty class. Switching frequency limits are specified per duty class: up to 750 operations per hour in AC-3 and AC-3e, 700 in AC-1 (resistive), and 250 in AC-2 and AC-4 (slip-ring motor starting and plugging/reversing). Mounting is by screw fixing through an 11 mm hole; the contactor can be rotated ±22.5° on a vertical surface, tilted forward/backward ±22.5°, or stood on a horizontal surface. Dimensions are 214 mm high, 160 mm wide, and 225 mm deep — the depth being the dimension to account for when planning gland-plate clearance or enclosure depth. Clearance distances: 10 mm upwards and downwards, 10 mm to the side, 20 mm forwards. Main power connections accept stranded cable from 70 to 240 mm²; auxiliary and coil connections accept solid or stranded conductors from 0.5 to 4 mm².","metaTitle":"Siemens 3RT1275-6LA06 SIRIUS Vacuum Contactor, S12, 361 A at","metaDescription":"Siemens SIRIUS 3RT1275-6LA06 vacuum contactor, size S12, rated 361 A at 480 V AC-3. Active production. Screw fixing, 225 mm depth. Sourced to order against RFQ.","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":"60 ... 100 ms","at DC":"60 ... 100 ms","Height":"214 mm","Upwards":"10 mm","Forwards":"20 mm","Stranded":"70 ... 240 mm²","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"10 mm","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","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 500 V rated value":"250 kW","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":"No","Substance Prohibitance (Date)":"05/01/2012","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)","At Contactor For Auxiliary Contacts":"Screw-type terminals","With Type Of Coordination 1 Required":"gG: 800 A (690 V, 100 kA)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"21 W","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","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","Type Of Voltage Of The Control Supply Voltage":"AC/DC","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":"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/3158e3fcfa1c2848787ae086188f393f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=371784&mlfb=3RT1275-6LA06","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1275-6LA06/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions for panel planning?","answer":"Height is 214 mm, width is 160 mm, and depth is 225 mm. Clearance requirements are 10 mm upwards, 10 mm downwards, 10 mm to the side, and 20 mm forwards."},{"question":"What is the AC-3 rating at 480 V?","answer":"The contactor is rated 361 A at 480 V in AC-3 duty, which is the category for starting and stopping squirrel-cage induction motors."},{"question":"What cable sizes does the main power connection accept?","answer":"The main power terminals accept stranded cable from 70 mm² up to 240 mm²."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1275-6LA06","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/3RT1275-6LA06 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}}