{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1275-6AP36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1275-6AP36","canonicalUrl":"https://aoctrl.com/siemens/3RT1275-6AP36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1275-6AP36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS vacuum contactor, size S12, 3RT1275-6AP36, 220-240 V rated coil voltage, screw-type terminals, screw fixing, 214 x 160 x 225 mm.","salesMarkdown":"The vacuum arc-quenching chamber handles frequent switching without contact erosion, making it suited for applications like conveyors, pumps, and compressors that cycle heavily. The coil is rated for 220-240 V AC/DC, with a pick-up threshold of 0.8x rated value and a drop-out at 1.1x full-scale value, meaning it holds in reliably across a sag to about 176 V and releases cleanly above 264 V. Mechanical life is rated at 10,000,000 operations typical, and the contactor can sustain operating rates up to 750 cycles per hour in AC-3 duty (motor starting) and 250 cycles per hour in AC-4 (plugging/reversing). Auxiliary contact ratings: 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, and 1 A at 110 V. These are the make/break capacities for the control circuit — a 24 V PLC output driving a relay or a 110 V interlock both fall within range, but the 110 V limit means you cannot switch a 2 A 110 V load on this auxiliary contact. Power wiring accepts stranded conductors from 70 to 240 mm², while the coil and auxiliary wiring accept solid or stranded from 0.5 to 4 mm². That covers main motor feeders up to about 300 A and control wiring down to 20 AWG. Mounting is by screw fixing with one 11 mm hole. That flexibility helps when retrofitting into existing enclosures where the backplate is already drilled. ## Dimensions and clearances The contactor measures 214 mm high, 160 mm wide, and 225 mm deep. These clearances ensure adequate air circulation and arc-quenching space — a panel builder should account for them when laying out the gland plate and busbar runs.","metaTitle":"Siemens 3RT1275-6AP36 SIRIUS Vacuum Contactor, S12, 220-240","metaDescription":"Siemens 3RT1275-6AP36 SIRIUS vacuum contactor, size S12, 220-240 V AC/DC coil. Rated for 10 A at 24 V, 2 A at 48/60 V, 1 A at 110 V. Screw fixing, 214x160x225 mm. Active production","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","title":"3RT1275-6AP36","Height":"214 mm","Upwards":"10 mm","Forwards":"20 mm","Stranded":"70 ... 240 mm²","at 50 Hz":"0.9","at 60 Hz":"0.9","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"10 mm","Rated Value":"220 ... 240 V","description":"vacuum contactor AC-3e/AC-3 400 A, 200 kW / 400 V, 3-pole, Uc: 220-240 V AC(50-60 Hz) / DC drive: conventional auxiliary contacts 2 NO + 2 NC main circuit: busbar control and auxiliary circuit: screw terminal","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":"220 ... 240 V","at 500 V rated value":"2 A","at 60 Hz rated value":"220 ... 240 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":"10 W","closing power of magnet coil at DC":"920 W","holding power of magnet coil at DC":"10 W","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3ac8b4dd6baae79b873e59792a7fd30a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=507474&mlfb=3RT1275-6AP36"},"ai":{"faq":[{"question":"What are the key dimensions of this contactor?","answer":"Height 214 mm, width 160 mm, depth 225 mm. Minimum clearances: 10 mm up/down/sides, 20 mm forward."},{"question":"What wire sizes does the 3RT1275-6AP36 accept?","answer":"Main power terminals accept stranded 70-240 mm². Coil and auxiliary terminals accept solid or stranded 0.5-4 mm² (2x 0.5-1.5 mm², 2x 0.75-2.5 mm², max 2x 0.75-4 mm²)."},{"question":"What is the operating temperature range?","answer":"During operation: -25 to +60 °C. During storage: -55 to +80 °C."},{"question":"How does this compare to the 3RT1076-6AP36?","answer":"The 3RT1076-6AP36 is a similar SIRIUS vacuum contactor but in a smaller frame size (S10 vs S12). The 3RT1275-6AP36 has a larger footprint (214x160x225 mm vs the S10's smaller dimensions) and accepts larger main conductors (up to 240 mm² stranded vs the S10's lower capacity). If your panel was designed for the 3RT1076-6AP36, the 3RT1275-6AP36 will not drop in without drilling new mounting holes and checking clearance for the larger envelope."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1275-6AP36","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/3RT1275-6AP36 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}}