{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-1AA42-0AH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-1AA42-0AH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0AH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0AH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1112-1AA42-0AH0 switch disconnector, IEC frame 160, 4-pole SD100, In=125 A, without overload or short-circuit protection, nut keeper kit, 2 auxiliary switches HQ + 1 trip alarm switch HQ, front busbar connection.","salesMarkdown":"This is a load-break disconnect, not a circuit breaker — it has no overload or short-circuit protection elements built in. It is designed for manual isolation and switching of circuits where overcurrent protection is handled upstream or by a separate device. Rated operational voltage goes up to 690 V AC 50/60 Hz and 600 V DC, with an insulation voltage (Ui) of 800 V. The 125 A rating is the uninterrupted current the disconnector can carry continuously without exceeding a 38 W maximum power loss. That 38 W is the heat you need to manage inside the enclosure — at 125 A steady load, the switch will dissipate that much. Main circuit connections are via front-facing busbar terminals — the busbar connection type means it is designed to bolt directly onto a busbar system inside the panel, not to accept lugged cables. A nut keeper kit is included for the busbar mounting hardware. That part provides both overload and short-circuit protection (LI characteristic) and has a higher interrupting capacity — up to 187 kA at 240 V. The 3VA1112-1AA42-0AH0, by contrast, is a switch disconnector with no trip unit and no overcurrent protection. It is the correct choice when the protective function is already covered upstream and only a visible-break isolation switch is needed. It will not drop into a panel designed for the 3VA2116 without rewiring: the 3VA1112 is 4-pole versus the 3VA2116's 3-pole, and the busbar connection arrangement differs.","metaTitle":"Siemens 3VA1112-1AA42-0AH0 SENTRON Switch Disconnector, 125","metaDescription":"Siemens SENTRON 3VA1112-1AA42-0AH0 switch disconnector, 125 A rated continuous current, 4-pole, IP40 front, busbar connection. Current lifecycle stage. 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":"101.6 mm","Height":"130 mm","Limited To 1 S":"2 kA","Trip indicator":"Yes","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":"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 + 1 trip alarm switch 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":"Without auxiliary release","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":"3","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=470608&mlfb=3VA1112-1AA42-0AH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0AH0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA1112-1AA42-0AH0?","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 commercial response."},{"question":"What is the closest functional second-source — 3VA2116-5HL32-0AK0?","answer":"The 3VA2116-5HL32-0AK0 is a 3-pole molded case circuit breaker with an electronic trip unit, providing overload and short-circuit protection. The 3VA1112-1AA42-0AH0 is a 4-pole switch disconnector with no overcurrent protection. They serve different functions and are not direct substitutes. If you need a disconnect-only function at 125 A, the 3VA1112 is the correct part; if you need a breaker with protection, the 3VA2116 is the right choice."},{"question":"What is 3VA1112-1AA42-0AH0's listed depth (70 mm) on this component line?","answer":"The depth is 70 mm. Combined with a width of 101.6 mm and height of 130 mm, this defines the panel space required for front-busbar mounting."},{"question":"Will 3VA1112-1AA42-0AH0 drop into a panel that was specified around 3VA2116-5HL32-0AK0 without rewiring?","answer":"No. The 3VA1112 is a 4-pole switch disconnector with a different busbar connection arrangement; the 3VA2116 is a 3-pole breaker. The pole count, connection method, and mounting footprint differ — rewiring and busbar rework would be required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0AH0","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/3VA1112-1AA42-0AH0 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}}