{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-1AA42-0AE0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-1AA42-0AE0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0AE0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0AE0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1112-1AA42-0AE0, switch disconnector in MCCB design, IEC frame 160, 4-pole, In=125 A, without overload or short-circuit protection, busbar connection front terminal, 4 auxiliary switches HQ, IP40 front.","salesMarkdown":"It carries no overload or short-circuit protection — this is a pure disconnect for isolation, not a circuit breaker. The front-terminal busbar connection and the four HQ auxiliary switches (4 CO contacts) make it a fit for panel builders who need a service disconnect with auxiliary signaling, not branch-circuit protection. The 125 A continuous rating at the 160 A frame means this disconnect handles full-load current up to 125 A without derating in a 40 °C ambient — the frame itself has headroom, so terminal temperature rise stays within IEC limits at rated load. The busbar connection (front terminal) means the part is designed for direct plug-on busbar systems, not lug or cable termination — verify your panel's busbar pitch and finger configuration. The 70 mm depth, 101.6 mm width, and 130 mm height match the standard 3VA1 frame footprint, so it occupies the same DIN-rail or mounting-plate space as a 4-pole MCCB of the same frame. ## Deployment context This is a panel-mounted switch disconnector for isolating a load circuit — typically a motor feeder, a distribution sub-feed, or a machine supply — where the upstream protective device (MCCB or fuse) handles overcurrent, and this part provides visible isolation and auxiliary status contacts. The four HQ auxiliary switches can signal open/closed position to a PLC or indicate status on a mimic panel.","metaTitle":"Siemens 3VA1112-1AA42-0AE0 SENTRON Switch Disconnector, 125","metaDescription":"Siemens SENTRON 3VA1112-1AA42-0AE0 switch disconnector, 125 A rated continuous current, 4-pole, IP40 front. Current lifecycle stage. Sourced to order against RFQ.","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":"No","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":"4 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":"Without auxiliary release","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":"4","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=65924&mlfb=3VA1112-1AA42-0AE0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0AE0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1112-1AA42-0AE0 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial offer."},{"question":"What is the closest functional alternative — 3VA1010-2ED42-0AE0?","answer":"The 3VA1010-2ED42-0AE0 is a 4-pole molded case circuit breaker (line protection) at 100 A, not a switch disconnector. It includes overcurrent release (TM210) and short-circuit protection, which the 3VA1112-1AA42-0AE0 intentionally lacks. They share the same 70 x 101.6 x 130 mm footprint and front-terminal connection, so a panel designed for one can physically accept the other, but the function is different — the 3VA1010-2ED42-0AE0 is a breaker, not a disconnect-only device."},{"question":"Will 3VA1112-1AA42-0AE0 drop into a panel specified around 3VA1010-2ED42-0AE0 without rewiring?","answer":"Yes — both parts share the same 70 mm depth, 101.6 mm width, 130 mm height, and front-terminal busbar connection, so the physical footprint and busbar interface are identical. The wiring difference is functional: the 3VA1112-1AA42-0AE0 has no overcurrent release, so upstream protection must already be in place."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0AE0","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/3VA1112-1AA42-0AE0 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}}