{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA6812-8AC","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA6812-8AC","canonicalUrl":"https://aoctrl.com/siemens/3RA6812-8AC","factsUrl":"https://aoctrl.com/api/mcp/products/3RA6812-8AC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA6812-8AC infeed left, 63 A at 400 V AC-3, 690 V max, spring-loaded main circuit terminals, screw and snap-on mounting, 3 slots for compact load feeders.","salesMarkdown":"The 3RA6812-8AC: This rating directly governs the motor load it can switch — a 63 A AC-3 contactor pair or compact starter downstream sees the full rated current without derating at 400 V. The infeed-left design feeds the main circuit from the left side using screw terminals on the input (max 25 mm² solid/stranded) and spring-loaded terminals on the outgoing feeder (max 25 mm² solid/stranded). Three slots accept compact load feeders, making this a distribution block for a group of starters rather than a single motor path. ## Mounting and panel integration Mounts via screw and snap-on fastening to DIN rail — the 180 mm width, 208 mm height, and 144 mm depth fit standard enclosure layouts. Pollution degree 3 means it tolerates conductive dust and humidity typical of industrial panels without conformal coating. Spring-loaded terminals on the load side accept 2 x (2.5 … 25 mm²) solid or stranded, with a stripped length of 13 mm for the main contacts. The infeed-left orientation simplifies busbar routing when the panel feed enters from the left side. ## Environmental and mechanical endurance Shock resistance tested at 6 m/s² semi-sinusoidal, 10 ms duration in all axes; vibration resistance per 4–5.8 Hz at 15 mm amplitude and 5.8–500 Hz at 2 m/s² for 10 cycles.","metaTitle":"Siemens 3RA6812-8AC SIRIUS Infeed Left, 63 A, 690 V","metaDescription":"Siemens 3RA6812-8AC SIRIUS infeed left for compact starters. 63 A at 400 V AC-3, 690 V max. Active production, quoted to order against RFQ.","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":"3RA6812-8AC","Height":"208mm","Stranded":"2 x (2.5 ... 25 mm²)","description":"Infeed left Connection main circuit: input: Screw, Outgoing feeder: Spring 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)","Type Of Electrical Connection For Main Current Circuit":"spring-loaded 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"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/06ef50d9e08aae3e946470a3f088df92.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=459293&mlfb=3RA6812-8AC"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA6812-8AC","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/3RA6812-8AC 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}}