{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-1AA42-0KC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-1AA42-0KC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-1AA42-0KC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-1AA42-0KC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-1AA42-0KC0, switch disconnector in MCCB design, 4-pole, In=250 A, 690 V AC / 600 V DC, with shunt trip (STL) 220-250 V DC / 208-277 V AC, 2 auxiliary switches HQ, busbar connection, IP40 front.","salesMarkdown":"## What this 250 A switch disconnector is for The Siemens SENTRON 3VA1225-1AA42-0KC0 is a 4-pole switch disconnector built in the MCCB frame format — rated for 250 A continuous current (Iu) and 690 V AC / 600 V DC maximum operational voltage. It provides visible-break isolation for a load circuit without overcurrent or short-circuit protection, so it is the disconnect ahead of a downstream protected feeder or a motor branch. The 250 A frame size suits larger sub-distribution boards, industrial machine infeed sections, or UPS bypass paths where you need a service-rated switch, not a breaker. The 690 V AC and 600 V DC maximum operational voltages mean it can isolate circuits at common industrial voltage levels, including 400/480 V three-phase and 500 V DC bus systems. Short-time withstand is 3 kA for 0.5 s and 1 s (the part can hold closed under fault current for that duration to allow a downstream breaker to clear). ## Integrated shunt trip and auxiliary contacts This variant ships with a factory-fitted shunt trip (STL) release rated 220-250 V DC / 208-277 V AC, allowing remote tripping from a safety circuit or emergency-stop chain. The auxiliary contacts share the same mechanical endurance as the main switch: 15,000 latching operations. No undervoltage release is fitted, so the switch holds in regardless of control voltage presence — if you need a UVR for anti-restart protection, this is not the variant. ## Physical integration and mounting The disconnector measures 140 mm wide × 158 mm high × 70 mm deep — a 4-pole MCCB footprint that mounts via the front terminals (busbar connection type) for bolted busbar or cable lug landing.","metaTitle":"Siemens 3VA1225-1AA42-0KC0 SENTRON Switch Disconnector, 250","metaDescription":"Siemens SENTRON 3VA1225-1AA42-0KC0 switch disconnector, 250 A rated continuous current, 4-pole, 690 V AC / 600 V DC, with shunt trip and 2 HQ auxiliary switches. Current lifecycle","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":"2 auxiliary switches 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":"2","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=569289&mlfb=3VA1225-1AA42-0KC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-1AA42-0KC0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1225-1AA42-0KC0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at the time of quote."},{"question":"Does 3VA1225-1AA42-0KC0 provide overcurrent or short-circuit protection?","answer":"No — this is a switch disconnector only, without overload or short-circuit protection elements. It is designed for isolation and switching of a circuit that is protected upstream or downstream by a separate breaker or fuse."},{"question":"What voltage ratings does this disconnector support?","answer":"Maximum rated operational voltage is 690 V AC (50/60 Hz) and 600 V DC. Rated insulation voltage is 800 V."},{"question":"What is the closest functional alternative to 3VA1225-1AA42-0KC0?","answer":"The 3VA1010-2ED32-0JC0 is a 3-pole 100 A molded case circuit breaker in the same SENTRON 3VA family with the same 15,000-cycle endurance and shunt trip option, but it includes overcurrent protection (TM210 release) and lacks the 4th pole — it is a breaker, not a disconnector, so it cannot serve as a visible-break isolator. The 3VA1225-1AA42-0KC0 is the correct part when you need a 4-pole 250 A switch disconnector without protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-1AA42-0KC0","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/3VA1225-1AA42-0KC0 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}}