{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-1AA42-0HH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-1AA42-0HH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0HH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0HH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1112-1AA42-0HH0 switch disconnector, IEC frame 160, 4-pole, 125 A, without overload or short-circuit protection, shunt trip release, 2 aux switches + 1 trip alarm switch.","salesMarkdown":"The Siemens 3VA1112-1AA42-0HH0 is a SENTRON switch disconnector in an MCCB-style housing — IEC frame 160, 4-pole, rated for 125 A continuous across the full ambient range from 40 °C to 70 °C. It provides no overload or short-circuit protection; its job is safe isolation and disconnection under load. The shunt trip release (STL) accepts 12–30 V DC or 24 V AC 50/60 Hz for remote tripping, and the auxiliary switch block carries 2 HQ auxiliary switches plus 1 trip alarm switch, giving 3 CO contacts total. ## What the 125 A rating means for panel fit That makes it a straightforward drop-in for a 125 A feeder or branch disconnect where the load current is known and stable. The front terminals accept busbar connections, so it integrates into a panel bus system without lug adapters. At 70 mm deep, 101.6 mm wide, and 130 mm tall, it occupies the same footprint as a 3VA1 MCCB of the same frame; the 4-pole width is wider than the 3-pole sibling (76.2 mm).","metaTitle":"Siemens SENTRON 3VA1112-1AA42-0HH0 Switch Disconnector, 125","metaDescription":"Siemens 3VA1112-1AA42-0HH0 SENTRON switch disconnector, 125 A continuous rating, 4-pole, IP40 front, shunt trip release. Current production. Sourced to order. Request a quote.","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":"Yes","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 + 1 trip alarm switch HQ","Design Of The Auxiliary Release":"Shunt trip (STL)","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=26145&mlfb=3VA1112-1AA42-0HH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0HH0/alternatives.json"},"ai":{"faq":[{"question":"What is the shunt trip voltage range for this switch disconnector?","answer":"The shunt trip (STL) operates on 12–30 V DC or 24 V AC 50/60 Hz."},{"question":"How many auxiliary contacts does this unit have?","answer":"It includes 2 auxiliary switches HQ plus 1 trip alarm switch HQ, providing 3 CO contacts total."},{"question":"Where can I buy 3VA1112-1AA42-0HH0 and how is it quoted?","answer":"This part is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0HH0","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/3VA1112-1AA42-0HH0 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}}