{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-1AA42-0KH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-1AA42-0KH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0KH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0KH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1112-1AA42-0KH0, 4-pole switch disconnector in MCCB design, 125 A rated continuous current, busbar connection, with shunt trip release and auxiliary contacts.","salesMarkdown":"Rated continuous current Iu is 125 A, with max operational voltage 690 V AC 50/60 Hz and 600 V DC. That makes it suitable for isolating a 125 A feeder in a 400 V or 480 V distribution panel, or a DC bus up to 600 V. The main circuit connects via busbar connection with front terminals — it's designed to bolt directly onto a busbar stack in a panel, not for cable lugging. That means you can remote-trip it from a PLC or E-stop circuit and get status feedback on the switch position and whether it tripped via the shunt. At 125 A continuous, this switch disconnector handles the full rated current of a 125 A feeder without derating — no thermal trip curve to worry about since there's no overcurrent release. The 15 000 latching endurance cycles (mechanical life) is typical for a disconnector in this frame size; it's not a daily-switch duty part but fine for infrequent isolation or maintenance switching. The 2 kA limited short-time rating (1 s and 0.5 s) tells you it can withstand a fault current up to 2 kA for those durations without welding contacts — important for coordination with an upstream protective device. Below that threshold it's a safe isolation point; above it you need the upstream breaker to clear before the disconnector fails. Power loss is max 38 W at rated current. That's heat that needs to be considered in a sealed enclosure — 38 W per unit adds up in a multi-feeder panel, so account for ventilation or derating if ambient hits 70 °C (the max operating temp). Dimensions are 130 mm height, 101.6 mm width, 70 mm depth — the 101.6 mm width is a standard 4-pole MCCB footprint (roughly 4 x 25.4 mm per pole). It will fit the same busbar mounting pattern as other 3VA1 frame 160 disconnectors.","metaTitle":"Siemens 3VA1112-1AA42-0KH0 Switch Disconnector, 125A, 4-Pole","metaDescription":"Siemens SENTRON 3VA1112-1AA42-0KH0 switch disconnector, 125A rated continuous current, 4-pole, shunt trip 220-250V DC / 208-277V AC, busbar connection. Current lifecycle stage. Ava","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":"Yes","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 + 1 trip alarm switch 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":"3","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=13370&mlfb=3VA1112-1AA42-0KH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0KH0/alternatives.json"},"ai":{"faq":[{"question":"Can I buy 3VA1112-1AA42-0KH0 and what is the lead time?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or lead time number is published here."},{"question":"What is the difference between 3VA1112-1AA42-0KH0 and 3VA1110-5EE32-0JA0?","answer":"The 3VA1112-1AA42-0KH0 is a 4-pole switch disconnector (no overload/short-circuit protection) at 125 A, while 3VA1110-5EE32-0JA0 is a 3-pole molded case circuit breaker with thermal-magnetic overcurrent release (TM220) rated 100 A. The 3VA1110 is wider per pole (76.2 mm for 3 poles vs 101.6 mm for 4 poles) and includes line protection — the 3VA1112 is a pure disconnector for isolation duty only."},{"question":"What compliance documentation does Siemens provide for this part?","answer":"As a Siemens SENTRON IEC 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 on request. UL listing is not standard for this IEC-coded variant — if UL is required, specify the UL version of the 3VA1 frame."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0KH0","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/3VA1112-1AA42-0KH0 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}}