{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-1AA42-0AF0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-1AA42-0AF0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-1AA42-0AF0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-1AA42-0AF0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-1AA42-0AF0, switch disconnector in MCCB design, IEC frame 250, 4-pole, 250 A at 40 °C, 690 VAC / 600 VDC, busbar connection, 1 auxiliary switch HQ + 1 trip alarm switch HQ.","salesMarkdown":"That derating curve means you can push this into a hot enclosure without oversizing. ## What this disconnect does — and doesn't do This is a straight switch disconnector — no overload protection, no short-circuit protection. It's meant for isolating a circuit under load, not for protecting it. The main circuit connects via busbar connection with front terminals, so you're looking at a solid copper bar drop, not wire lugs. That's enough to signal position back to a PLC or light a panel indicator. It's a bare-bones disconnect — reliable, simple, and built for the long haul with a mechanical life of 15,000 operating cycles. Footprint is 70 mm deep, 140 mm wide, 158 mm tall (–). That's a four-pole unit taking up about five and a half inches of DIN-rail width. Front IP40 protection keeps tools and fingers out but isn't rated for washdown — keep this inside a closed panel. Maximum power loss is 57 W, so factor that into your enclosure heat budget.","metaTitle":"Siemens 3VA1225-1AA42-0AF0 SENTRON Switch Disconnector, 250","metaDescription":"Siemens SENTRON 3VA1225-1AA42-0AF0 switch disconnector, 250 A at 40 °C, 4-pole, IEC frame 250, busbar connection. Active production, 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":"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 switches + 1 trip alarm switch HQ","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=569269&mlfb=3VA1225-1AA42-0AF0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-1AA42-0AF0/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between this switch disconnector and a molded case circuit breaker like 3VA1110-5ED36-0AC0?","answer":"The key difference: 3VA1225-1AA42-0AF0 is a switch disconnector with no overload or short-circuit protection — it isolates a circuit under load but doesn't protect it. The 3VA1110-5ED36-0AC0 is a full molded case circuit breaker with a TM210 overcurrent release (LI protection). The disconnect is 140 mm wide (4-pole) versus 76.2 mm (3-pole) for the breaker. Both use front terminals, but the disconnect uses busbar connection while the breaker uses box terminals. They are not drop-in interchangeable — different pole count, different width, different function."},{"question":"Where can I buy 3VA1225-1AA42-0AF0 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — no stock count or price is published here."},{"question":"What are the key ratings for 3VA1225-1AA42-0AF0?","answer":"Rated 250 A continuous at 40 °C (holds to 50 °C), 690 VAC / 600 VDC operating voltage, 800 V insulation voltage. Four poles, busbar connection, front terminals. Mechanical life 15,000 operating cycles. IP40 front protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-1AA42-0AF0","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/3VA1225-1AA42-0AF0 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}}