{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA6812-8AB","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA6812-8AB","canonicalUrl":"https://aoctrl.com/siemens/3RA6812-8AB","factsUrl":"https://aoctrl.com/api/mcp/products/3RA6812-8AB","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA6812-8AB infeed left, 63 A at 400 V AC-3, 690 V maximum, screw terminals, 3 slots for compact load feeders, DIN rail.","salesMarkdown":"## 63 A AC-3 at 400 V — the motor-switching rating The 3RA6812-8AB: The maximum operating voltage of 690 V provides headroom for 400/480 V systems without derating. ## Infeed-left design with 3 feeder slots The 3RA6812-8AB is an infeed-left module for the SIRIUS compact load feeder system, providing three slots for plug-in feeder modules. Main circuit connection uses screw-type terminals accepting solid or stranded wire up to 2 x 25 mm², with a stripped length of 13 mm and tightening torque of 3 to 4.5 N·m. ## Mounting and environmental fit Dimensions are 180 mm wide, 197 mm high, 144 mm deep — the width accommodates the three feeder slots. Pollution degree 3 rating means it tolerates conductive dust and humidity typical of industrial control panels. Operating temperature range is -20 to +60 °C; storage and transport range is -55 to +80 °C. ## Shock and vibration resistance Qualified for semi-sinusoidal shock at 6 m/s² over 10 ms in all axes, and vibration resistance from 4 to 5.8 Hz at 15 mm amplitude, then 5.8 to 500 Hz at 2 m/s² over 10 cycles. This suits installations on machinery or conveyors subject to mechanical stress.","metaTitle":"Siemens 3RA6812-8AB SIRIUS Infeed Left, 63 A, 690 V","metaDescription":"Siemens 3RA6812-8AB SIRIUS infeed left for compact load feeders. 63 A at 400 V AC-3, 690 V max, screw terminals up to 25 mm².","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"144mm","Solid":"2 x (2.5 ... 25 mm²)","Width":"180mm","title":"3RA6812-8AB","Height":"197mm","Stranded":"2 x (2.5 ... 25 mm²)","description":"Infeed left Connection main circuit: screw terminal 3 slots for compact load feeders Connection terminal maximum 25 mm2 / 35 mm2","During Storage":"-55 ... +80°C","lifecycle_stage":"current","During Operation":"-20 ... +60°C","During Transport":"-55 ... +80°C","Fastening Method":"screw and snap-on mounting","Shock Resistance":"Semi-sinusoidal a = 6 m/s2 at 10 ms; 3 pos. and 3 neg. Shock in all axes","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"infeed left","Vibration Resistance":"f = 4 to 5.8 Hz; d = 15 mm; f = 5.8 to 500 Hz; a = 2 m / s2 10 cycles","according to EN 61346-2":"W","according to IEC 81346-2":"W","Stripped Length For Main Contacts":"13mm","Number Of Slots For Compact Feeder":"3","Finely Stranded With Core End Processing":"2 x (2.5 ... 16 mm²)","Finely Stranded Without Core End Processing":"2 x (2.5 ... 16 mm²)","operating voltage at AC-3 rated value maximum":"690V","operational current at AC at 400 V rated value":"63A","For Main Contacts For Load-Side Outgoing Feeder":"2 x (16 ... 10), 1 x (16 ... 8)","Design Of Screw-Type Connection For Main Contacts":"M3","Type Of Electrical Connection For Main Current Circuit":"screw-type terminals","For Supply For Main Contacts Using Both Clamping Points":"2 x (16 ... 2)","Installation Altitude At Height Above Sea Level Maximum":"2 000m","For Supply For Main Contacts Using The Lower Clamping Point":"12 ... 2","For Supply For Main Contacts Using The Upper Clamping Point":"12 ... 2","Tightening Torque For Main Contacts With Screw-Type Terminals":"3 ... 4.5N·m"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/eaa09137f6f0994b20bf3042e8c10fea.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=155739&mlfb=3RA6812-8AB"},"ai":{"faq":[{"question":"What is the key rating for motor switching?","answer":"This is the rating that governs motor load switching per IEC 60947-4-1."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA6812-8AB","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/3RA6812-8AB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}