{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-1AA42-0AC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-1AA42-0AC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0AC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0AC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1 frame switch disconnector, 4-pole, 125 A continuous, MCCB design, without overload or short-circuit protection, with 2 HQ auxiliary switches.","salesMarkdown":"Siemens 3VA1112-1AA42-0AC0 is a SENTRON switch disconnector in MCCB design — 4-pole, rated 125 A continuous across 40 °C to 70 °C without derating. This is a pure disconnect — no overload protection, no short-circuit protection. The description flags it as SD100 (switch disconnector), so it's intended for isolation and switching under load where upstream protection (a fuse or MCCB) handles the fault clearing. Mechanical service life is 15,000 operating cycles typical. Front IP40 protection on the front. The auxiliary switch block is integrated as 2 HQ switches — these are high-rupturing-capacity microswitches suitable for direct switching of PLC inputs without an interposing relay in most cases. Motor drive is listed as an optional extension. Maximum power loss is 38 W. That's the heat to account for in the enclosure thermal calculation.","metaTitle":"Siemens 3VA1112-1AA42-0AC0 SENTRON Switch Disconnector, 125","metaDescription":"Siemens 3VA1112-1AA42-0AC0 SENTRON switch disconnector, 125 A continuous rating, 4-pole, in MCCB design. Current lifecycle stage. Sourced 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","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":"No","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":"2 auxiliary switches HQ","Design Of The Auxiliary Release":"Without auxiliary release","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":"2","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=151695&mlfb=3VA1112-1AA42-0AC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0AC0/alternatives.json"},"ai":{"faq":[{"question":"Will 3VA1112-1AA42-0AC0 drop into a panel specified around 5SQ2670-2YA63?","answer":"No — the 5SQ2670-2YA63 is a 4-module MCB (63 A, C-curve) with different mounting and protection function. The 3VA1 is an MCCB-frame disconnect; different cutout and wiring requirements."},{"question":"What compliance documentation does Siemens provide for this part?","answer":"As a current-production SENTRON component, standard Siemens declarations (CE, UKCA, RoHS, REACH) are available. Specific documentation should be requested at quote time to match your jurisdiction requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0AC0","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/3VA1112-1AA42-0AC0 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}}