{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-1AA42-0DD0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-1AA42-0DD0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0DD0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0DD0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3VA1 series, switch disconnector, IEC frame 160, 4-pole SD100, In=125A, without overload or short-circuit protection, undervoltage release 208-230V AC 50/60Hz, 3 auxiliary switches HQ, nut keeper kit.","salesMarkdown":"The Siemens 3VA1112-1AA42-0DD0 is a 4-pole switch disconnector from the 3VA1 IEC frame 160 series, rated at In=125A. It provides visible isolation for a circuit but carries no overload or short-circuit protection — it is a disconnect switch, not a breaker. The integrated undervoltage release (208-230V AC 50/60Hz) automatically opens the switch when control voltage drops, protecting downstream equipment from brownout or phase-loss conditions. Three auxiliary switches (HQ type) report the main contact position back to a PLC or status panel. ## Deployment Context The 4-pole configuration suits three-phase plus neutral disconnection for motor feeder or distribution sub-circuits. The undervoltage release coil draws continuously when energized — factor that into control transformer sizing.","metaTitle":"Siemens 3VA1112-1AA42-0DD0 Switch Disconnector, 125A, 4-Pole","metaDescription":"Siemens 3VA1112-1AA42-0DD0 switch disconnector, 3VA1 IEC frame 160, 4-pole, In=125A, no overload/short-circuit protection, undervoltage release 208-230V AC, 3 aux switches. Current","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"lifecycle_stage":"current"}},"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=1093870&mlfb=3VA1112-1AA42-0DD0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0DD0/alternatives.json"},"ai":{"faq":[{"question":"What is the rated current and configuration of this switch disconnector?","answer":"It is a 4-pole switch disconnector rated at In=125A, without overload or short-circuit protection, and includes an undervoltage release for 208-230V AC 50/60Hz."},{"question":"Where can I buy 3VA1112-1AA42-0DD0 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0DD0","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/3VA1112-1AA42-0DD0 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}}