{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-1AA42-0JA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-1AA42-0JA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0JA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0JA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1 series, switch disconnector in MCCB design, 4-pole, 125 A, shunt trip release, front busbar connection.","salesMarkdown":"The Siemens 3VA1112-1AA42-0JA0 is a SENTRON 3VA1 switch disconnector in a molded-case circuit breaker (MCCB) footprint — a 4-pole load-break switch rated for 125 A continuous, with no overcurrent or short-circuit protection built in. It is designed for isolation and switching duty where the upstream protection is handled separately. The shunt trip release (STL) accepts 110–127 V DC or AC 50/60 Hz, letting a remote safety relay or E-stop circuit open the switch without a manual handle pull. Rated insulation voltage 800 V and operating voltage 690 V AC / 600 V DC — this covers 480/277 V and 600 V industrial systems with headroom, and handles 400 V DC bus applications common in battery or UPS circuits. Maximum power loss of 38 W at rated current — a useful figure for enclosure thermal calculations; at 125 A continuous that loss is manageable in a standard steel enclosure with moderate ventilation. Mechanical service life of 15 000 operating cycles — typical for a switch disconnector in this frame size; adequate for daily isolation in a production line but not for frequent motor switching. Mount in a clean indoor panel, not a food-processing or outdoor location. ## Panel integration Dimensions: 130 mm height, 101.6 mm width, 70 mm depth — a 4-pole MCCB-form-factor switch that fits standard panel cutouts and busbar systems for the 3VA1 frame 160 family. Main circuit connection is via front busbar terminals with nut keeper kits included — no separate lug kit to order. The busbar connection type means it is designed for horizontal or vertical busbar stacking in a distribution panel. An optional motor drive can be added for remote switching (product extension optional).","metaTitle":"Siemens 3VA1112-1AA42-0JA0 SENTRON Switch Disconnector, 125","metaDescription":"Siemens 3VA1112-1AA42-0JA0 SENTRON switch disconnector, 125 A continuous rating, 4-pole, shunt trip release. Current production. 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","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":"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":"Without","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":"0","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=390235&mlfb=3VA1112-1AA42-0JA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-1AA42-0JA0/alternatives.json"},"ai":{"faq":[{"question":"What is the 3VA1112-1AA42-0JA0 used for?","answer":"It is a switch disconnector — a 4-pole load-break switch rated 125 A for isolating circuits under load, without overcurrent or short-circuit protection. It is used in distribution panels where the upstream breaker or fuse provides fault protection and this switch provides a visible disconnect point."},{"question":"Where can I buy the 3VA1112-1AA42-0JA0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the shunt trip voltage for this switch disconnector?","answer":"The shunt trip release (STL) operates on 110–127 V DC or AC 50/60 Hz."},{"question":"Does the 3VA1112-1AA42-0JA0 provide overload or short-circuit protection?","answer":"No — it is a switch disconnector without overload protection or short-circuit protection. It is specified for isolation and switching only; upstream protection must be provided separately."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-1AA42-0JA0","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/3VA1112-1AA42-0JA0 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}}