{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-1AA42-0KA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-1AA42-0KA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0KA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0KA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1112-1AA42-0KA0, switch disconnector in MCCB design, IEC frame 160, 4-pole SD100, In=125 A, without overload or short-circuit protection, with shunt trip (STL) 220-250 V DC; 208-277 V AC.","salesMarkdown":"The Siemens SENTRON 3VA1112-1AA42-0KA0 is a 4-pole switch disconnector in an MCCB-style package, rated 125 A continuous across the full 40 °C to 70 °C ambient range — no derating needed as the panel warms up. It carries the IEC frame 160 footprint and comes factory-fitted with a shunt trip (STL) release for remote tripping on 220–250 V DC or 208–277 V AC control circuits. Rated insulation voltage Ui is 800 V, and the maximum operating voltage reaches 690 V AC or 600 V DC — so it handles 480 V and 600 V class systems comfortably, with headroom for 690 V industrial networks. The 125 A rating holds flat from 40 °C through 70 °C, meaning a panel that runs hot (say, 55 °C inside the enclosure) still carries the full 125 A without a sizing penalty. That flat curve is unusual for a switch disconnector and simplifies panel design. The shunt trip release is a voltage-trigger device — apply control voltage and it opens the switch. It is specified for 220–250 V DC or 208–277 V AC, which covers common North American and European control voltages. There is no undervoltage release or auxiliary switch on this variant; the shunt trip is the only auxiliary release fitted. Mechanical service life is 15 000 operating cycles typical. For a switch disconnector used mainly for isolation (not frequent motor starting), that is a solid figure — it will outlast most panel reconfigurations. Front terminals accept busbar connection — the main current circuit is wired from the front, which keeps the panel layout clean and allows busbar stacking. The 4-pole width (101.6 mm) is roughly 4 inches, so it occupies a standard 4-module MCCB footprint on the DIN rail or mounting plate. Front IP40 protection means it is splash-safe in a closed panel but not washdown-rated. Power loss is 38 W maximum at rated current. That is moderate for a 125 A 4-pole device — account for it in the enclosure thermal calculation, especially if several units are ganged.","metaTitle":"3VA1112-1AA42-0KA0 SENTRON Switch Disconnector, 125 A, 4-Pol","metaDescription":"Siemens SENTRON 3VA1112-1AA42-0KA0 switch disconnector, 125 A rated at 40-70°C, 4-pole, IEC frame 160, with shunt trip 220-250 V DC / 208-277 V AC. Active production, sourced to or","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","at 40 °C":"125 A","at 45 °C":"125 A","at 50 °C":"125 A","at 55 °C":"125 A","at 60 °C":"125 A","at 65 °C":"125 A","at 70 °C":"125 A","Trip Indicator":"No","Number Of Poles":"4","Voltage Trigger":"Yes","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Switch disconnector","Undervoltage Release":"No","Design Of The Product":"in MCCB design","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"38 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Design Of The Auxiliary Switch":"Without","Design Of The Auxiliary Release":"Shunt trip (STL)","Insulation Voltage / Rated Value":"800 V","protection class IP / on the front":"IP40","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"600 V","Product Function / Communication Function":"No","Undervoltage Release With Leading Contact":"No","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","number of CO contacts / for auxiliary contacts":"0","Mechanical Service Life (Operating Cycles) / Typical":"15 000","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=346379&mlfb=3VA1112-1AA42-0KA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0KA0/alternatives.json"},"ai":{"faq":[{"question":"What is the shunt trip voltage range on this switch disconnector?","answer":"The shunt trip (STL) operates on 220–250 V DC or 208–277 V AC, covering standard control voltages for both North American and European panels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0KA0","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/3VA1112-1AA42-0KA0 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}}