{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-1AA42-0KH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-1AA42-0KH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-1AA42-0KH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-1AA42-0KH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-1AA42-0KH0, MCCB-design switch disconnector, 4-pole, 250 A rated continuous current Iu, 690 VAC / 600 VDC max, busbar connection with front terminals.","salesMarkdown":"The Siemens 3VA1225-1AA42-0KH0 is a 4-pole switch disconnector built in an MCCB (moulded-case circuit breaker) form factor, part of the SENTRON family. It is rated for a continuous current Iu of 250 A and carries a maximum operational voltage of 690 V AC (50/60 Hz) or 600 V DC. The main circuit connects via busbar connection with front terminals, making it a direct panel-mount device for isolation and switching duty. The 250 A continuous rating holds flat from 40 °C through 50 °C, then derates linearly to 223 A at 70 °C — a useful thermal budget for warm enclosures. The 4-pole configuration handles three-phase plus neutral isolation in a single unit. Maximum power loss is 57 W, so factor that into enclosure ventilation calculations. No undervoltage release is fitted. A motor drive is available as an optional extension. ## Physical fit and connection The front-terminal busbar connection is standard for MCCB-style panel layouts. Verify busbar spacing and gland-plate clearance against your enclosure — the 140 mm width is wider than a typical 4-pole MCB, consistent with its 250 A rating.","metaTitle":"Siemens 3VA1225-1AA42-0KH0 SENTRON MCCB Switch Disconnector,","metaDescription":"Siemens SENTRON 3VA1225-1AA42-0KH0 MCCB-style switch disconnector, 250 A continuous, 4-pole, 690 VAC. Current production. Sourced to order. Request quote.","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","Limited To 1 S":"3 kA","Trip indicator":"Yes","Number of poles":"4","Product version":"in MCCB design","Voltage trigger":"Yes","lifecycle_stage":"current","Limited To 0.5 S":"3 kA","Product brand name":"SENTRON","Product designation":"Switch disconnector","Latching - endurance":"15 000","Undervoltage Release":"No","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Power loss [W] / maximum":"57 W","Auxiliary contact version":"2 auxiliary switches + 1 trip alarm switch HQ","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Rated continuous current Iu":"250 A","Rated insulation voltage Ui":"800 V","Design of the auxiliary release":"Shunt trip (STL)","Protection class IP / on the front":"IP40","Reference code / acc. to DIN EN 81346-2":"Q","Max. rated operational voltage Ue with DC":"600 V","Undervoltage Release With Leading Contact":"No","Product extension / optional / motor drive":"Yes","Number of CO contacts / for auxiliary contacts":"3","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","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=569290&mlfb=3VA1225-1AA42-0KH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-1AA42-0KH0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1225-1AA42-0KH0 and how is it quoted?","answer":"This part is sourced through independent distribution channels and quoted to order against an RFQ. Availability and current pricing are confirmed at the time of quote — no stock count or price is published here."},{"question":"What are the key electrical ratings for this switch disconnector?","answer":"Rated continuous current Iu is 250 A, with a maximum operational voltage of 690 V AC (50/60 Hz) and 600 V DC. Rated insulation voltage Ui is 800 V. The unit is a 4-pole design."},{"question":"What is the depth of 3VA1225-1AA42-0KH0?","answer":"The depth is 70 mm. Overall dimensions are 70 mm deep, 140 mm wide, and 158 mm high."},{"question":"Does this part include a shunt trip or undervoltage release?","answer":"It includes a shunt trip release (STL) for remote tripping. No undervoltage release is fitted. The auxiliary contact configuration is 2 auxiliary switches plus 1 trip alarm switch (HQ)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-1AA42-0KH0","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/3VA1225-1AA42-0KH0 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}}