{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-1AA42-0AG0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-1AA42-0AG0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-1AA42-0AG0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-1AA42-0AG0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-1AA42-0AG0, switch disconnector in MCCB design, 4-pole, In=250A at 40°C, 690V AC / 600V DC, busbar connection, IP40 front, with 1 auxiliary switch + 1 trip alarm switch HP.","salesMarkdown":"It's designed to isolate a circuit under load — no overload or short-circuit protection built in, so it's a pure disconnect for maintenance isolation or as a line-side switch ahead of a downstream protection device. That puts it squarely in industrial power distribution — motor control centres, panel main switches, or as a load-break disconnect for a machine cell. Busbar connection on the main circuit, front terminals, so it's meant for busbar-stacked or cable-fed distribution blocks, not screw-clamp wiring direct to the lugs. Above that it starts to step down: 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C. That's a clean linear derate curve — about 1.4 A per degree above 50 °C. Maximum power dissipation is 57 W at rated current. ## Auxiliary contacts and options Comes with one auxiliary switch (form C, 2 CO contacts) plus one trip alarm switch HP — both built in. That's enough for a remote status indication and a separate alarm signal if the disconnect trips on an external fault. Width 140 mm, height 158 mm, depth 70 mm. That is a standard MCCB footprint — mounts on a backplate or DIN rail via the nut keeper kit included. That's adequate for a main disconnect that sees a few operations a day; for frequent switching duty you'd want a contactor instead.","metaTitle":"Siemens 3VA1225-1AA42-0AG0 SENTRON Switch Disconnector, 250A","metaDescription":"Siemens SENTRON 3VA1225-1AA42-0AG0 switch disconnector, 250A rated at 40°C, 4-pole, 690V AC/600V DC. Active production. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"140 mm","Height":"158 mm","at 40 °C":"250 A","at 45 °C":"250 A","at 50 °C":"250 A","at 55 °C":"243 A","at 60 °C":"237 A","at 65 °C":"230 A","at 70 °C":"223 A","Trip Indicator":"Yes","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Switch disconnector","Undervoltage Release":"No","Design Of The Product":"in MCCB design","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"57 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Design Of The Auxiliary Switch":"1 auxiliary switch + 1 trip alarm switch HP","Design Of The Auxiliary Release":"Without auxiliary release","Insulation Voltage / Rated Value":"800 V","protection class IP / on the front":"IP40","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"600 V","Product Function / Communication Function":"No","Undervoltage Release With Leading Contact":"No","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","number of CO contacts / for auxiliary contacts":"2","Mechanical Service Life (Operating Cycles) / Typical":"15 000","Type Of Electrical Connection / For Main Current Circuit":"busbar connection","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=569270&mlfb=3VA1225-1AA42-0AG0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-1AA42-0AG0/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings on this switch disconnector?","answer":"Rated 250 A continuous at 40 °C ambient, 690 V AC / 600 V DC operating voltage, 800 V insulation voltage. 4-pole construction with busbar connection and IP40 front protection."},{"question":"Will 3VA1225-1AA42-0AG0 drop into a panel specified around 5SQ2670-2YA63?","answer":"No — the 5SQ2670-2YA63 is a 63 A miniature circuit breaker (MCB) in a different form factor and protection class. This part is a 250 A switch disconnector in an MCCB footprint; it won't fit the same DIN-rail space or busbar layout without rewiring."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-1AA42-0AG0","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/3VA1225-1AA42-0AG0 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}}