{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-1AA42-0KA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-1AA42-0KA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-1AA42-0KA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-1AA42-0KA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1 IEC frame, switch disconnector, 3VA1225-1AA42-0KA0, 4-pole, In=250 A, shunt trip (STL) 220-250V DC / 208-277V AC, IP40 front, busbar connection.","salesMarkdown":"It is designed without overload or short-circuit protection — this is a pure isolating and switching device, not a circuit breaker. The shunt trip (STL) release operates on 220-250 V DC or 208-277 V AC, giving a remote trip capability for emergency-off or interlock circuits. The 250 A continuous rating (Iu) sets the maximum load current the disconnector can carry without exceeding its thermal limits — sized for a 250 A feeder or the main incoming supply on a distribution panel. Rated insulation voltage Ui of 800 V and max operational voltage of 690 V AC / 600 V DC cover standard 400 V and 480 V industrial networks, with headroom for 690 V applications. The shunt trip (STL) release is the only auxiliary release fitted — no undervoltage release, no auxiliary contacts. If you need remote status feedback or undervoltage protection, those functions must be added externally. The busbar connection on the front terminals accepts standard busbar systems for panel distribution; verify busbar compatibility with the 70 mm depth and 140 mm width before layout. Switch disconnectors of this class are installed as main isolators in distribution boards, machine control panels, and switchgear assemblies. They provide a visible break for safe isolation during maintenance, and the shunt trip allows remote opening from a safety relay or PLC output. The 250 A frame size suits it as the main disconnect for a group of motor starters, a large machine tool, or a sub-distribution board fed from a transformer.","metaTitle":"Siemens 3VA1225-1AA42-0KA0 SENTRON Switch Disconnector, 250","metaDescription":"Siemens SENTRON 3VA1225-1AA42-0KA0 switch disconnector, 250 A rated continuous current, 4-pole, shunt trip STL 220-250V DC / 208-277V AC. IP40 front. 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","Limited To 1 S":"3 kA","Trip indicator":"No","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":"Without","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":"0","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=569288&mlfb=3VA1225-1AA42-0KA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-1AA42-0KA0/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to 3VA1225-1AA42-0KA0?","answer":"The peer 3VA1010-2ED32-0JA0 is a 3-pole molded case circuit breaker with line protection and an overcurrent release, not a pure switch disconnector. It cannot drop into the same panel without rewiring — different pole count, different footprint (76.2 mm width vs 140 mm), and the 3VA1010 includes overload and short-circuit protection that this disconnector deliberately omits."},{"question":"Where can I buy 3VA1225-1AA42-0KA0?","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 commitment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-1AA42-0KA0","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/3VA1225-1AA42-0KA0 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}}