{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-1AA36-0AC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-1AA36-0AC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-1AA36-0AC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA36-0AC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1112-1AA36-0AC0, switch disconnector in MCCB design, 3-pole, 125 A, 70 mm depth, front terminal connection, 2 auxiliary switches HQ.","salesMarkdown":"The Siemens SENTRON 3VA1112-1AA36-0AC0 is a 3-pole switch disconnector built in an MCCB-style frame — IEC frame 160, rated 125 A continuous across the full operating temperature range from 40 °C to 70 °C without derating. That flat thermal curve is unusual: most breakers and disconnectors start stepping down above 40 °C, so this part is a clean fit for a warm enclosure or a panel near a heat source where you need the full 125 A at 70 °C. It is a pure disconnector — no overload or short-circuit protection built in (the description flags 'without overload protection w/o short-circuit protection'). That means it is specified as a load-break isolating device downstream of a protective device, or as a maintenance disconnect where the upstream MCCB or fuse already handles fault interruption. The 800 V rated insulation voltage and 690 V AC / 500 V DC operating voltage give it headroom for 400 V and 480 V distribution panels. The auxiliary switches are built in, not an add-on kit — saves a wiring step during panel build. Mechanical service life is 15,000 operating cycles typical — adequate for a disconnect that sees daily or weekly switching, not a high-cycle application like a welding press. If you need higher cycle life, the MCCB variant (3VA1112-5EE32-0AA0) offers 20,000 cycles but adds thermal-magnetic protection you may not want in a pure disconnect role. Dimensions: 130 mm high, 76.2 mm wide, 70 mm deep — standard MCCB footprint for the 160 A frame. Front terminals mean the busbar or cable connections land on the face, not the rear, which simplifies wiring in a shallow enclosure. IP40 on the front face is typical for a panel-mounted device; the enclosure itself provides the overall IP rating. Optional motor drive available if remote operation is needed. ## Comparison: disconnector vs MCCB variant The closest peer in the same frame is the 3VA1112-5EE32-0AA0, a full molded case circuit breaker with thermal-magnetic protection (TM220 release, LI characteristic). Same dimensions, same 125 A rating at 40 °C, same front terminal arrangement. The differences: the MCCB variant has a higher mechanical life (20,000 cycles), includes overload and short-circuit protection, and carries a switching capacity class M rating. The 3VA1112-1AA36-0AC0 disconnector is the right choice when you need a load-break isolating switch without integral protection — typically downstream of a separate protective device or in a safety disconnect role where the upstream breaker already coordinates.","metaTitle":"Siemens 3VA1112-1AA36-0AC0 SENTRON Switch Disconnector, 125","metaDescription":"Siemens SENTRON 3VA1112-1AA36-0AC0 switch disconnector, 125 A continuous at 40-70 °C, 3-pole, IP40 front. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"76.2 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":"3","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Switch disconnector","Undervoltage Release":"No","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":"Without auxiliary release","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":"500 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":"Terminal 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=64389&mlfb=3VA1112-1AA36-0AC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA36-0AC0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1112-1AA36-0AC0 and what is the lead time?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for the current position."},{"question":"Will 3VA1112-1AA36-0AC0 drop into a panel specified for 3VA1112-5EE32-0AA0 without rewiring?","answer":"Yes, the two share identical dimensions (130 x 76.2 x 70 mm), same 3-pole layout, same front terminal connection. The disconnector swaps directly into the same panel cutout and busbar arrangement. The only functional difference is the absence of overload/short-circuit protection in the disconnector — verify the upstream protection scheme before substituting."},{"question":"What are the key ratings of 3VA1112-1AA36-0AC0?","answer":"125 A continuous at any temperature from 40 °C to 70 °C, 3-pole, rated insulation voltage 800 V, operating voltage 690 V AC / 500 V DC, IP40 front protection, 15,000 mechanical cycles, 38 W power loss at rated current."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-1AA36-0AC0","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/3VA1112-1AA36-0AC0 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}}