{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-1AA42-0DH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-1AA42-0DH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0DH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0DH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1112-1AA42-0DH0, switch disconnector in MCCB design, 4-pole, 125 A continuous, 690 V AC, undervoltage release 208-230 V AC, 2 auxiliary switches HQ + 1 trip alarm switch HQ, busbar connection, IP40 front.","salesMarkdown":"## Switch disconnector, 125 A, no overload protection ## Integrated undervoltage release and auxiliary switching This variant ships with an undervoltage release (UVR) rated 208-230 V AC 50/60 Hz, plus 2 HQ auxiliary switches and 1 HQ trip alarm switch — three CO contacts total. The UVR trips the disconnector when control voltage drops, which is standard for safety isolation in machine tools or conveyor lines where loss of control power should open the load circuit. Maximum power loss is 38 W at rated current. Mechanical service life is 15 000 operating cycles typical. An optional motor drive can be added via the product extension slot.","metaTitle":"Siemens 3VA1112-1AA42-0DH0 SENTRON Switch Disconnector, 125","metaDescription":"Siemens SENTRON 3VA1112-1AA42-0DH0 switch disconnector in MCCB design. 125 A continuous, 4-pole, 690 V AC. Includes undervoltage release (208-230 V AC) and 2 aux + 1 trip alarm swi","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":"Yes","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 + 1 trip alarm switch 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":"3","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=404986&mlfb=3VA1112-1AA42-0DH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0DH0/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to 3VA1112-1AA42-0DH0?","answer":"The 3VA1110-5ED36-0AC0 is a 3-pole molded case circuit breaker (not a switch disconnector) with overcurrent release TM210, rated 100 A at 40 °C, and no undervoltage release. It is a different product class — the 3VA1112-1AA42-0DH0 is a 4-pole disconnect with UVR, so they are not drop-in substitutes without rewiring and re-evaluating protection coordination."},{"question":"Where can I buy 3VA1112-1AA42-0DH0 and how is it quoted?","answer":"This part is sourced to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — no stock count or price is published here."},{"question":"What compliance documentation is available for 3VA1112-1AA42-0DH0?","answer":"The part carries IEC 60947 design (reference code Q per IEC 81346-2) and IP40 front protection. Standard Siemens declarations for RoHS and REACH are available with the product documentation package."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0DH0","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/3VA1112-1AA42-0DH0 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}}