{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1276-6AB36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1276-6AB36","canonicalUrl":"https://aoctrl.com/siemens/3RT1276-6AB36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1276-6AB36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS vacuum contactor, Size S12, order code 3RT1276-6AB36, 225 mm depth, 214 mm height, 160 mm width, screw fixing, 10 000 000 typical mechanical cycles.","salesMarkdown":"The Siemens 3RT1276-6AB36 is a SIRIUS-branded vacuum contactor in Size S12, designed for switching motor loads in industrial control panels where arc suppression and long mechanical life matter — 10 000 000 typical cycles on the contactor. Vacuum interrupters mean the arc quenches inside a sealed bottle, so this contactor suits environments with frequent switching or where contact erosion from arcing in air is a concern. The S12 frame carries stranded power wiring from 70 up to 240 mm², and the auxiliary switch is included — no separate add-on needed for basic status feedback. ## Mounting and panel fit — screw fixing, generous clearances Fastening is by screw fixing through a single 11 mm hole. Mounting position is flexible: ±22.5° rotation on a vertical surface, can tilt forward/backward by the same angle, and can stand on a horizontal mounting surface. That 225 mm depth plus 20 mm forward clearance means the panel depth needs at least 245 mm from the mounting plate to the door. Overall dimensions: 214 mm height, 160 mm width. The screw terminals on the magnet coil accept solid or stranded wire: 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², max 2x 0.75–4 mm². Coil rated value is 23–26 V, with a pick-up factor of 0.8 x rated and a drop-out factor of 1.1 x full-scale. Switching frequency limits: 700 ops/h at AC-1 (resistive), 250 ops/h at AC-2 and AC-4, and 750 ops/h at AC-3 and AC-3e. Auxiliary contact ratings: 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, 1 A at 110 V. These are the switching limits for the control circuit — stay under these for reliable signal feedback. Power factor at 50 Hz and 60 Hz is 0.9.","metaTitle":"Siemens 3RT1276-6AB36 SIRIUS Vacuum Contactor, Size S12, 225","metaDescription":"Siemens SIRIUS 3RT1276-6AB36 vacuum contactor, Size S12, 225 mm depth, 214 mm height, 160 mm width. Rated for 10M mechanical cycles. Current lifecycle. Quoted 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","title":"3RT1276-6AB36","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":"23 ... 26 V","description":"vacuum contactor AC-3e/AC-3 500 A, 250 kW / 400 V, 3-pole, Uc: 23-26 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":"477 A","at 50 Hz rated value":"23 ... 26 V","at 500 V rated value":"2 A","at 60 Hz rated value":"23 ... 26 V","at 600 V rated value":"472 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","at 1000 V rated value":"710 kW","For Auxiliary Contacts":"18 ... 14","Width Of Connection Bar":"25 mm","For Main Current Circuit":"Connection bar","at 200/208 V rated value":"150 hp","at 220/230 V rated value":"200 hp","at 460/480 V rated value":"400 hp","at 575/600 V rated value":"500 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":"96 W","at AC-3e rated value maximum":"1 000 V","at AC-4 at 400 V rated value":"430 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)","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":"32 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","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/e8403e6dc821b7e2f133ad63e061da86.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=328991&mlfb=3RT1276-6AB36"},"ai":{"faq":[{"question":"What wire sizes does 3RT1276-6AB36 accept?","answer":"Power terminals accept stranded 70–240 mm². Coil terminals accept solid or stranded: 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², max 2x 0.75–4 mm²."},{"question":"What is the mechanical life of this contactor?","answer":"10 000 000 typical mechanical cycles. Switching frequency at AC-3 duty is 750 ops/h maximum."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1276-6AB36","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/3RT1276-6AB36 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}}