{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-1AA42-0DA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-1AA42-0DA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0DA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0DA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1 IEC frame 160, switch disconnector, 4-pole SD100, 125 A, without overload or short-circuit protection, undervoltage release 208-230 V AC 50/60 Hz, busbar connection, front terminal, IP40 front.","salesMarkdown":"The Siemens 3VA1112-1AA42-0DA0 is a SENTRON 3VA1 switch disconnector in an IEC frame 160 package, rated for 125 A continuous current (Iu) across 4 poles. It is configured as a pure disconnect — no overload or short-circuit protection elements onboard — making it a load-break switch for isolation duty rather than a circuit breaker. The 125 A rating means it handles the full load current of a 4-pole distribution or motor feeder circuit where overcurrent protection is provided upstream or by a separate device. ## Undervoltage release and connection details The UVR trips the disconnector when the control voltage drops below its dropout threshold — standard practice for preventing automatic restart after a supply dip on machinery or conveyors where unexpected re-energisation creates a personnel hazard. The main circuit connects via busbar terminals on the front face, so panel layout expects a busbar stack rather than individual cable lugs. No auxiliary contacts are fitted; if status feedback to a PLC is required, the optional auxiliary contact block must be added separately. Front-face protection is IP40. The 125 A continuous current rating (Iu) at 800 V insulation voltage (Ui) defines the maximum uninterrupted current the disconnector can carry.","metaTitle":"Siemens 3VA1112-1AA42-0DA0 SENTRON Switch Disconnector, 125","metaDescription":"Siemens 3VA1112-1AA42-0DA0 SENTRON switch disconnector, 125 A rated continuous current, 4-pole, with undervoltage release 208-230 V AC. Current production. Quoted to order against","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":"No","lifecycle_stage":"current","Limited To 0.5 S":"2 kA","Product brand name":"SENTRON","Product designation":"Switch disconnector","Latching - endurance":"15 000","Undervoltage Release":"Yes","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Power loss [W] / maximum":"38 W","Auxiliary contact version":"Without","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":"Undervoltage release (UVR)","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=434404&mlfb=3VA1112-1AA42-0DA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0DA0/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0DA0","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/3VA1112-1AA42-0DA0 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}}