{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-1AA42-0AG0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-1AA42-0AG0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0AG0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0AG0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1 IEC frame 160, 4-pole SD100 switch disconnector, In=125 A, without overload or short-circuit protection, IP40 front, 1 auxiliary switch HP + 1 trip alarm switch HP.","salesMarkdown":"The Siemens 3VA1112-1AA42-0AG0 is a SENTRON 3VA1 switch disconnector in MCCB design — IEC frame 160, 4-pole, rated for 125 A continuous current (Iu). It's a pure isolator: no overload or short-circuit protection built in, so it's meant for applications where the upstream device handles fault interruption and this part provides visible isolation and safe disconnection under load. The 4-pole configuration makes it suitable for three-phase plus neutral switching, common in distribution panels feeding mixed single-phase and three-phase loads. The 125 A rated continuous current (Iu) sets the maximum load it can carry continuously without exceeding temperature limits. That's the number you match to your feeder or load current — not a motor FLA, but the ampacity of the circuit it isolates. It ships with 1 auxiliary switch HP and 1 trip alarm switch HP — that's two CO contacts total. The auxiliary switch signals the open/closed position; the trip alarm switch signals when it's been operated (manually or via the optional motor drive). Useful for remote status indication in a PLC or SCADA system. The optional motor drive allows remote switching, though it's not included here. Power loss is 38 W max at rated current. That's heat that stays inside the enclosure — factor it into your panel thermal calculation, especially if the switchgear is densely packed. The 15 000 mechanical endurance cycles is typical for a switch disconnector in this class — fine for infrequent switching, not for a daily motor start application. Front terminals for the main circuit with busbar connection type — meaning it's designed to bolt onto a busbar system, not for individual cable lugs. The auxiliary contacts are wired separately via the front terminal block. The 1 auxiliary switch + 1 trip alarm switch HP configuration gives you two independent signal paths — one for position, one for operation event.","metaTitle":"Siemens 3VA1112-1AA42-0AG0 SENTRON Switch Disconnector, 125","metaDescription":"Siemens 3VA1112-1AA42-0AG0 SENTRON switch disconnector, 125 A rated continuous current, 4-pole, IP40 front. Current lifecycle. Quoted 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":"Yes","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":"1 auxiliary switch + 1 trip alarm switch HP","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":"2","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=473020&mlfb=3VA1112-1AA42-0AG0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0AG0/alternatives.json"},"ai":{"faq":[{"question":"What is 3VA1112-1AA42-0AG0 used for?","answer":"It's a 4-pole switch disconnector rated 125 A, used for safe isolation of three-phase plus neutral circuits in distribution panels. No overload or short-circuit protection — it's a disconnect switch, not a circuit breaker."},{"question":"Does 3VA1112-1AA42-0AG0 include auxiliary contacts?","answer":"Yes, it ships with 1 auxiliary switch HP and 1 trip alarm switch HP, providing two CO contacts for remote status indication."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0AG0","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/3VA1112-1AA42-0AG0 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}}