{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-1AA42-0DC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-1AA42-0DC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0DC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0DC0","rawCanonicalId":null},"summary":{"shortDescription":"SENTRON 3VA1112-1AA42-0DC0 switch disconnector, IEC frame 160, 4-pole, In=125 A, without overload or short-circuit protection, with undervoltage release 208-230 V AC 50/60 Hz, 2 auxiliary switches HQ, busbar connection.","salesMarkdown":"## Switch disconnector in MCCB form factor — 125 A continuous, no trip curve The SENTRON 3VA1112-1AA42-0DC0 is a 4-pole switch disconnector built in an MCCB-style housing (IEC frame 160). This is a pure disconnecting device: it provides no overload or short-circuit protection, so it is intended for isolation and safety disconnection where the upstream protection is handled by a separate circuit breaker or fuse. ## Built-in undervoltage release and auxiliary switches This variant ships with an undervoltage release (UVR) factory-installed, rated for 208–230 V AC 50/60 Hz, and two high-quality auxiliary switches (2 CO contacts). The UVR ensures the disconnector trips automatically if control voltage drops, which is a common requirement for safety circuits and motor feeder isolation. The front terminal arrangement and busbar connection pattern match the standard 3VA MCCB footprint, so it can be panel-integrated alongside other 3VA breakers without rework. The main circuit connects via busbar from the front terminals; the UVR and auxiliary switches terminate with standard screw or cage-clamp connections. An optional motor drive can be added for remote operation.","metaTitle":"SENTRON 3VA1112-1AA42-0DC0 Switch Disconnector, 125 A, 4-Pol","metaDescription":"SENTRON 3VA1112-1AA42-0DC0 switch disconnector in MCCB design, 4-pole, 125 A rated current at 40-70 °C, 690 V AC / 600 V DC, undervoltage release included. Active production, avail","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":"Yes","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":"Undervoltage release (UVR)","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=68642&mlfb=3VA1112-1AA42-0DC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0DC0/alternatives.json"},"ai":{"faq":[{"question":"What is the rated current of this switch disconnector?","answer":"125 A continuous, with no derating required from 40 °C up to 70 °C ambient."},{"question":"Does this part include overload or short-circuit protection?","answer":"No — it is a switch disconnector only, without overload or short-circuit protection. Upstream protection is required."},{"question":"What auxiliary contacts come with this unit?","answer":"Two high-quality auxiliary switches (2 CO contacts) are factory-installed."},{"question":"Where can I buy 3VA1112-1AA42-0DC0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0DC0","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/3VA1112-1AA42-0DC0 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}}