{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-1AA42-0HH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-1AA42-0HH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-1AA42-0HH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-1AA42-0HH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-1AA42-0HH0, switch disconnector in MCCB design, 4-pole, 250 A at 40 °C, 690 V AC, with shunt trip STL and 2 auxiliary switches + 1 trip alarm switch HQ.","salesMarkdown":"The Siemens 3VA1225-1AA42-0HH0 is a 4-pole SENTRON switch disconnector in MCCB design, rated 250 A continuously at 40 °C and 690 V AC. It is a non-fused disconnect — no overload or short-circuit protection built in — intended for isolation and switching of loads in distribution panels. The 250 A rating holds flat from 40 °C through 50 °C, then derates to 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C. That means in a warm panel — say 55 °C ambient — you lose 7 A of headroom; plan your load accordingly. Mechanical service life is 15 000 operating cycles typical — fine for infrequent isolation duty, not for daily switching under load. Maximum power loss is 57 W, which factors into panel thermal budgeting if the disconnect is enclosed. The disconnect measures 140 mm wide × 158 mm high × 70 mm deep. Main circuit connections are front-terminal busbar type — the lugs land on the front face, not the rear, so panel wiring is straightforward. The front carries an IP40 protection class, meaning tools and fingers are kept out, but it is not sealed against moisture.","metaTitle":"Siemens 3VA1225-1AA42-0HH0 SENTRON Switch Disconnector, 250","metaDescription":"Siemens 3VA1225-1AA42-0HH0 SENTRON switch disconnector, 4-pole, 250 A at 40 °C, 690 V AC. Active production. Shunt trip STL included. Sourced 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":"Yes","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":"2 auxiliary switches + 1 trip alarm switch HQ","Design Of The Auxiliary Release":"Shunt trip (STL)","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":"3","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=569284&mlfb=3VA1225-1AA42-0HH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-1AA42-0HH0/alternatives.json"},"ai":{"faq":[{"question":"What is the rated current of this switch disconnector?","answer":"The continuous rating is 250 A at 40 °C, 45 °C, and 50 °C, then derates to 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C."},{"question":"What auxiliary switches and releases come with this part?","answer":"It includes 2 auxiliary switches (HQ type), 1 trip alarm switch (HQ), and a shunt trip release (STL) rated 12-30 V DC / 24 V AC 50/60 Hz."},{"question":"How do I get pricing and availability for 3VA1225-1AA42-0HH0?","answer":"Submit an RFQ through the storefront — the part is sourced to order through independent distribution, and current pricing and stock are confirmed at quote time."},{"question":"Will this drop into a panel designed for a 5SQ2670-2YA63?","answer":"No — the 5SQ2670-2YA63 is a 63 A MCB in a different form factor (55 mm depth, IP20 front, 4 width units on DIN rail). The 3VA1225-1AA42-0HH0 is a 250 A MCCB-style disconnect with front busbar connections; it requires a different panel cutout and busbar arrangement."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-1AA42-0HH0","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/3VA1225-1AA42-0HH0 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}}