{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-1AA42-0HC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-1AA42-0HC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0HC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0HC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1 IEC frame 160, 4-pole switch disconnector SD100, In=125 A, without overload or short-circuit protection, shunt trip (STL) 12-30 V DC; 24 V AC 50/60 Hz, 2 auxiliary switches HQ, busbar connection, front terminal, IP40 front.","salesMarkdown":"## Switch disconnector for isolation duty Rated for AC operation up to 690 V 50/60 Hz and DC up to 600 V, this unit suits applications where a visible-break isolator is required by code for lockout/tagout, such as motor disconnects, panel main switches, or machine isolation points. The shunt trip (STL) release, accepting 12-30 V DC or 24 V AC, allows remote tripping — useful for emergency-stop circuits or interlocking schemes where the disconnector must open on a signal without an operator at the handle. Dimensions are 70 mm deep, 101.6 mm wide, and 130 mm tall — the 101.6 mm width (4 inches) occupies four 25 mm DIN-rail module spaces, so plan for a 4-M width in the enclosure layout. Main circuit connections are busbar-style front terminals, meaning the busbars or cable lugs land on the front face rather than the sides — this affects busbar routing and requires clearance in front of the device for tool access. Maximum power dissipation is 38 W at rated load, which should be factored into enclosure thermal calculations, particularly in densely populated panels. Operating temperature range is -25 °C to +70 °C, with storage from -40 °C to +80 °C — suitable for most indoor industrial environments but verify if the panel ambient exceeds 70 °C near ovens or furnaces.","metaTitle":"Siemens 3VA1112-1AA42-0HC0 SENTRON Switch Disconnector, 125","metaDescription":"Siemens 3VA1112-1AA42-0HC0 SENTRON switch disconnector, 125 A rated continuous current, 4-pole, shunt trip STL, 2 auxiliary switches HQ. Current lifecycle. 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":"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=106281&mlfb=3VA1112-1AA42-0HC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0HC0/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between this switch disconnector and a molded case circuit breaker?","answer":"This unit is a switch disconnector (SD100) without overload or short-circuit protection — it provides load-break isolation only, unlike a molded case circuit breaker which includes overcurrent releases. For a 3-pole MCCB with similar frame size, see the 3VA1110-5EE32-0JA0, which includes a TM220 thermal-magnetic release and offers interrupting ratings up to 187 kA at 240 V AC."},{"question":"Where can I buy 3VA1112-1AA42-0HC0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What compliance documentation is available for this switch disconnector?","answer":"As a Siemens SENTRON product, it carries CE marking for the European market and is designed to IEC 60947-3 standards for switch-disconnectors. RoHS and REACH compliance documentation is available from Siemens upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0HC0","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/3VA1112-1AA42-0HC0 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}}