{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-1AA42-0JA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-1AA42-0JA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-1AA42-0JA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-1AA42-0JA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-1AA42-0JA0, switch disconnector in MCCB design, 4-pole, In=250 A, without overload or short-circuit protection, shunt trip (STL) 110-127V DC/AC 50/60 Hz, busbar connection, IP40 front.","salesMarkdown":"## Siemens 3VA1225-1AA42-0JA0 — SENTRON Switch Disconnector, 250 A Frame Above 50 °C the current must be reduced per the thermal curve: 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C. This is a 4-pole unit with a shunt trip release (STL) rated for 110–127 V DC or AC 50/60 Hz, intended for remote emergency switching or load isolation where overload and short-circuit protection are handled upstream or downstream. Above 50 °C, the derating curve is mandatory — a panel that sees 60 °C ambient must be sized for 237 A, not 250 A. The 690 V AC / 600 V DC rated operating voltage covers most industrial line voltages up to 600 V class; the 800 V rated insulation voltage (Ui) means the internal clearances and creepage are designed for that potential, so the part can be used in 690 V systems without additional isolation. The shunt trip (STL) operates on 110–127 V DC or AC 50/60 Hz. This is a separate control voltage — it does not draw from the main circuit. The trip coil is energized to open the disconnector remotely; it is not an undervoltage release (the part explicitly has no undervoltage release). Mechanical service life is 15 000 operating cycles typical. This is a switch disconnector, not a circuit breaker for frequent switching — it is specified for isolation and infrequent load-break duty. ## Deployment Context — Panel Integration This disconnector uses busbar connection for the main current circuit, with front terminals for the control wiring. It is designed for panel mounting on a backplate or busbar system, not for snap-on DIN rail — the busbar connection requires a bolted interface. The optional motor drive (listed as available) allows remote motorized operation, but the base unit ships without it.","metaTitle":"Siemens 3VA1225-1AA42-0JA0 SENTRON Switch Disconnector, 250","metaDescription":"Siemens 3VA1225-1AA42-0JA0 SENTRON switch disconnector, 250 A rated current, 4-pole, MCCB design, shunt trip STL 110-127V AC/DC. Current lifecycle. 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":"140 mm","Height":"158 mm","at 40 °C":"250 A","at 45 °C":"250 A","at 50 °C":"250 A","at 55 °C":"243 A","at 60 °C":"237 A","at 65 °C":"230 A","at 70 °C":"223 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":"57 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=569285&mlfb=3VA1225-1AA42-0JA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-1AA42-0JA0/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3VA1225-1AA42-0JA0 — 5SQ2670-2YA06?","answer":"The 5SQ2670-2YA06 is a different class of device — a 6 A miniature circuit breaker (MCB) in the SENTRON 5SQ series, not a 250 A switch disconnector. It will not drop into the same panel without rewiring and is not a functional second-source for this part."},{"question":"Where can I buy 3VA1225-1AA42-0JA0 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price is published here."},{"question":"What compliance documentation does Siemens provide for 3VA1225-1AA42-0JA0?","answer":"The evidence does not list specific compliance documents (RoHS, REACH, UL, IEC) for this order code. Standard Siemens SENTRON switch disconnectors carry CE marking and are designed to IEC 60947-3; verify the specific declaration with the manufacturer for your jurisdiction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-1AA42-0JA0","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/3VA1225-1AA42-0JA0 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}}