{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-1AA42-0CH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-1AA42-0CH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-1AA42-0CH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-1AA42-0CH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-1AA42-0CH0, switch disconnector in MCCB design, 4-pole, In=250 A, with undervoltage release (UVR) 120-127 V AC, 2 auxiliary switches + 1 trip alarm switch HQ, busbar connection, IP40 front.","salesMarkdown":"## Switch disconnector 3VA1 frame 250 — 250 A, 4-pole, with undervoltage release It provides load-break isolation without overload or short-circuit protection — it is a disconnector, not a circuit breaker. The unit includes an undervoltage release (UVR) coil rated 120-127 V AC 50/60 Hz, which automatically opens the switch when control voltage drops, and is fitted with 2 auxiliary switches plus 1 trip alarm switch (HQ type) for status feedback to a PLC or indication panel. Rated continuous current Iu of 250 A defines the maximum load the main contacts can carry continuously without exceeding temperature rise limits — sized for a 250 A feeder or as a main disconnector on a distribution panel. The rated insulation voltage Ui of 800 V and max operational voltage of 690 V AC / 600 V DC cover standard 400/480 VAC three-phase systems with headroom for 690 V industrial networks. The undervoltage release (UVR) is a safety feature: if the control voltage (120-127 V AC) falls below its dropout threshold, the disconnector opens, preventing automatic restart on voltage recovery. This is standard for machinery guarding circuits where a loss of control power must isolate the load. The auxiliary contact complement — 2 form-C (CO) switches plus 1 dedicated trip alarm switch — provides separate NO/NC feedback for status and fault indication, enough for a remote I/O point without an interposing relay. The 3VA1 frame size (158 mm height, 140 mm width, 70 mm depth) mounts via front-panel busbar connection — the main terminals are on the front face, designed for bolted busbar or cable lugs, not DIN-rail snap-on. The unit accepts an optional motor drive for remote motorized operation, and the UVR coil is field-replaceable without disassembling the main contacts.","metaTitle":"Siemens 3VA1225-1AA42-0CH0 SENTRON Switch Disconnector, 250","metaDescription":"Siemens SENTRON 3VA1225-1AA42-0CH0 switch disconnector, 250 A rated continuous current, 4-pole, with undervoltage release 120-127 V AC. Current lifecycle stage, available 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":"140 mm","Height":"158 mm","Limited To 1 S":"3 kA","Trip indicator":"Yes","Number of poles":"4","Product version":"in MCCB design","Voltage trigger":"No","lifecycle_stage":"current","Limited To 0.5 S":"3 kA","Product brand name":"SENTRON","Product designation":"Switch disconnector","Latching - endurance":"15 000","Undervoltage Release":"Yes","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Power loss [W] / maximum":"57 W","Auxiliary contact version":"2 auxiliary switches + 1 trip alarm switch HQ","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Rated continuous current Iu":"250 A","Rated insulation voltage Ui":"800 V","Design of the auxiliary release":"Undervoltage release (UVR)","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":"3","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=569278&mlfb=3VA1225-1AA42-0CH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-1AA42-0CH0/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of this switch disconnector?","answer":"Rated continuous current Iu is 250 A, 4-pole, with max operational voltage 690 V AC and 600 V DC. It includes an undervoltage release (UVR) for 120-127 V AC 50/60 Hz, plus 2 auxiliary switches and 1 trip alarm switch."},{"question":"Where can I buy 3VA1225-1AA42-0CH0 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 — submit an RFQ for a firm commercial offer."},{"question":"What compliance documentation is available for this part?","answer":"As a Siemens SENTRON product, the 3VA1 series carries IEC 60947-3 certification for switch-disconnectors, plus UL/CSA listings for the North American market. RoHS and REACH declarations are standard from Siemens. Specific file numbers are available on request with the RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-1AA42-0CH0","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/3VA1225-1AA42-0CH0 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}}