{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-1AA42-0KC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-1AA42-0KC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0KC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0KC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1112-1AA42-0KC0, switch disconnector in MCCB design, IEC frame 160, 4-pole, In=125A, without overload or short-circuit protection, shunt trip (STL) 220-250V DC / 208-277V AC, 2 auxiliary switches HQ.","salesMarkdown":"This is a pure isolator — it carries no overload or short-circuit protection, so it is specified where the upstream breaker handles fault interruption and this device provides visible isolation and switching. The shunt trip release (STL) operates on 220–250 V DC or 208–277 V AC, and the two HQ auxiliary switches report the main contact position back to the control system. Rated continuous current Iu is 125 A on a 160 A frame — that is the maximum current it can carry continuously without exceeding the 70 °C operating limit. Rated insulation voltage Ui is 800 V, and the maximum operational voltage is 690 V AC 50/60 Hz or 600 V DC, so it covers 400 V and 480 V distribution panels with headroom. If your control voltage is 24 V DC, this release will not pick up — you need a different undervoltage or shunt trip variant. ## Panel integration The 3VA1112-1AA42-0KC0 mounts via the front terminals with busbar connection for the main circuit — it is designed for DIN-rail or direct-panel mounting in a distribution board. The 4-pole width means it occupies four module spaces on the rail. The two HQ auxiliary switches are built-in; no separate aux block purchase is needed for status feedback.","metaTitle":"Siemens 3VA1112-1AA42-0KC0 SENTRON Switch Disconnector, 125A","metaDescription":"Siemens SENTRON 3VA1112-1AA42-0KC0 switch disconnector, 125A rated current, 4-pole, shunt trip 220-250V DC/208-277V AC, 2 HQ aux switches. Active production, available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"101.6 mm","Height":"130 mm","Limited To 1 S":"2 kA","Trip indicator":"No","Number of poles":"4","Product version":"in MCCB design","Voltage trigger":"Yes","lifecycle_stage":"current","Limited To 0.5 S":"2 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":"38 W","Auxiliary contact version":"2 auxiliary switches HQ","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Rated continuous current Iu":"125 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=100332&mlfb=3VA1112-1AA42-0KC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0KC0/alternatives.json"},"ai":{"faq":[{"question":"Will 3VA1112-1AA42-0KC0 drop into a panel specified around 3VA1110-5EE32-0JA0?","answer":"No, not without rewiring. The 3VA1112-1AA42-0KC0 is a 4-pole switch disconnector (101.6 mm wide) while the 3VA1110-5EE32-0JA0 is a 3-pole molded case circuit breaker (76.2 mm wide) with overload and short-circuit protection. The width difference alone means the DIN-rail space allocation and busbar arrangement are different."},{"question":"What is the depth of 3VA1112-1AA42-0KC0?","answer":"70 mm."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0KC0","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/3VA1112-1AA42-0KC0 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}}