{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1340-1AA42-0BA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1340-1AA42-0BA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1340-1AA42-0BA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1340-1AA42-0BA0","rawCanonicalId":null},"summary":{"shortDescription":"SENTRON 3VA1 series, 3VA1340-1AA42-0BA0 switch disconnector, IEC frame 400, 4-pole, In=400A, without overload or short-circuit protection, with undervoltage release 24 V DC, nut keeper kit.","salesMarkdown":"The SENTRON 3VA1340-1AA42-0BA0 is a 400 A, 4-pole switch disconnector on the IEC frame 400, built without overload or short-circuit protection — it's a straight disconnect, not a breaker. ## What the 400 A rating means for fit The 400 A continuous rating on an IEC frame 400 means this disconnector handles the full load current of a large motor or a feeder without derating in a 40 °C ambient. It's sized for the main disconnect on a 250–315 kW motor circuit or a bus coupler in a switchboard. The nut keeper kit on both sides of the main current circuit accepts front-terminal connections — expect M10 or M12 busbar lugs, not cable tails. Verify the lug hole pattern against your existing busbar before committing the BOM line. ## Deployment context: panel integration This mounts in a fixed position within a switchboard or MCC bucket — it's not a DIN-rail snap-on device. The nut keeper kit holds the terminal nuts captive during wiring, which saves time when an electrician is torquing down lugs in a tight enclosure. The undervoltage release coil draws its 24 V DC from the control transformer; if the mill loses the 24 V bus, the disconnector opens immediately. In a rolling mill environment, that's the fail-safe behavior you want for a downstream conveyor or cooling-water pump.","metaTitle":"SENTRON 3VA1340-1AA42-0BA0 Switch Disconnector, 400A","metaDescription":"SENTRON 3VA1340-1AA42-0BA0 switch disconnector, 400A, 4-pole, IEC frame 400. Active production lifecycle. Quoted to order against RFQ. Includes undervoltage release 24 V DC.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"title":"3VA1340-1AA42-0BA0","description":"switch disconnector 3VA1 IEC frame 400 4-pole SD100, In=400A without overload protection w/o short-circuit protection nut keeper kit switch disconnector 3VA1 IEC frame 400 4-pole SD100, In=400A without overload protection w/o short-circuit protection nut keeper kit UNDERVOLTAGE RELEASE 24 V DC ACCESSORY FOR 3VA1 and 3VA20 up","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Switch disconnector"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f59d8c360c846d5ff9ef773daebb7908.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1476668&mlfb=3VA1340-1AA42-0BA0"},"ai":{"faq":[{"question":"Where can I buy 3VA1340-1AA42-0BA0 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"Will 3VA1340-1AA42-0BA0 drop into a panel specified for 3VA2116-5HM42-0CC0?","answer":"No — the 3VA1340 is a 400 A disconnector on an IEC frame 400, while the 3VA2116 is a 160 A breaker on a smaller frame. The footprint, busbar centers, and terminal arrangement differ. A panel designed for the 160 A breaker cannot accept the 400 A disconnector without mechanical and electrical rework."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1340-1AA42-0BA0","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/3VA1340-1AA42-0BA0 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}}