{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2063-8KQ42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2063-8KQ42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2063-8KQ42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2063-8KQ42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2063-8KQ42-0AA0, molded case circuit breaker, 4-pole, 63 A rated current Iu, ETU860 overcurrent release, line protection, 440 kA at 240 V.","salesMarkdown":"## Siemens SENTRON 3VA2063-8KQ42-0AA0 — 63 A MCCB with ETU860 Release The Siemens SENTRON 3VA2063-8KQ42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated at 63 A continuous current Iu, with no derating across the full 40 °C to 70 °C operating range — the same 63 A holds at every temperature step, so you don't lose headroom in a warm enclosure. It carries the ETU860 electronic overcurrent release, configurable for line protection duty. The 440 kA interrupting rating at 240 V (330 kA at 415 V / 440 V, 220 kA at 500 V, 52.5 kA at 690 V) means it clears high-fault currents upstream of a distribution panel without cascading to the main breaker — sized for high-capacity transformer secondaries or busway feeds. Dimensions are 140 mm wide by 181 mm high by 86 mm deep — the 4-pole width is the key fit check for existing MCCB buckets or DIN-rail adapters. IP40 on the front face protects against tool drops during commissioning; the rear and sides are unrated, so clearance to grounded metal per the manufacturer's mounting rules applies. The 86 mm depth (3.39 in) leaves room behind the panel door for wiring gutters or busbar stacks. ## Communication and Accessory Provisions This variant includes a communication function (fieldbus or Modbus interface via the ETU860), enabling power monitoring and remote trip indication. An optional motor drive extension is available for remote charging and closing. No undervoltage release or voltage trigger is fitted on this order code — those are separate add-on modules. The ground-fault monitoring version uses summation current formation on L + N conductors, so it detects leakage without a separate sensor core. Maximum power loss is 3 W — negligible for panel thermal budgeting.","metaTitle":"Siemens 3VA2063-8KQ42-0AA0 SENTRON MCCB, 63 A, 4-Pole, ETU86","metaDescription":"Siemens SENTRON 3VA2063-8KQ42-0AA0 molded case circuit breaker, 63 A rated, 4-pole, 440 kA at 240 V. Sourced to order against an RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"86 mm","Width":"140 mm","Height":"181 mm","at 240 V":"440 kA","at 415 V":"330 kA","at 440 V":"330 kA","at 500 V":"220 kA","at 690 V":"52.5 kA","at 40 °C":"63 A","at 45 °C":"63 A","at 50 °C":"63 A","at 55 °C":"63 A","at 60 °C":"63 A","at 65 °C":"63 A","at 70 °C":"63 A","Depth [In]":"3.39 in","Width [In]":"5.51 in","Height [In]":"7.13 in","Trip Indicator":"No","Number Of Poles":"4","Product version":"Line protection","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Communication Function":"Yes","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"3 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"Yes","Courant permanent assigné Iu":"63 A","Ground-Fault Monitoring Version":"Summation current formation L + N conductor","Tension assignée d'isolement Ui":"800 V","Design Of The Overcurrent Release":"ETU860","protection class IP / on the front":"IP40","reference code / acc. to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Adjustable response value current / lg max.":"63 A","Adjustable response value current / lg min.":"16 A","Adjustable response value current / li max.":"756 A","Adjustable response value current / li min.":"95 A","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"LSIG","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"L","Max. rated operational current of the frame size":"100 A","Mechanical Service Life (Operating Cycles) / Typical":"25 000","Type Of Electrical Connection / For Main Current Circuit":"on both sides nut keeper kit","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"13 x 1 mm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e3331758c52044a1c9b010a0f17c0875.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=211787&mlfb=3VA2063-8KQ42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2063-8KQ42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting rating of 3VA2063-8KQ42-0AA0 at 415 V?","answer":"330 kA at 415 V, and the same 330 kA at 440 V."},{"question":"Does the 63 A rating derate at high ambient temperatures?","answer":"No derating — the 63 A rating holds from 40 °C through 70 °C ambient. The same current is available at every temperature step in that range."},{"question":"Will 3VA2063-8KQ42-0AA0 drop into a panel specified around 3VA2063-8JQ42-0AA0?","answer":"Yes, the mechanical footprint (140 mm width, 181 mm height, 86 mm depth) and 4-pole format are identical between the two. The difference is the overcurrent release: the -8KQ42 carries the ETU860 (electronic, with communication), while the -8JQ42 uses a simpler ETU. Panel cutouts and busbar connections are the same."},{"question":"How do I get current pricing and availability for 3VA2063-8KQ42-0AA0?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an inquiry for a firm quote."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2063-8KQ42-0AA0","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/3VA2063-8KQ42-0AA0 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}}