{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-1AA32-0BH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-1AA32-0BH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-1AA32-0BH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-1AA32-0BH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-1AA32-0BH0, 3-pole switch disconnector in MCCB design, In=250 A, without overload or short-circuit protection, with undervoltage release 24 V DC, 2 auxiliary switches + 1 trip alarm switch HQ, busbar connection, front terminal.","salesMarkdown":"## Switch Disconnector for Load-Break Isolation The Siemens SENTRON 3VA1225-1AA32-0BH0 is a 3-pole switch disconnector in an MCCB (Molded Case Circuit Breaker) physical design, rated at 250 A continuous current across ambient temperatures up to 50 °C, with a slight derating curve above that: 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C. This unit is a pure switch disconnector — it provides no overload or short-circuit protection. Its job is safe load-break isolation under load, with a mechanical service life of 15 000 operating cycles typical. The main circuit connects via busbar connection at front terminals. Above 50 °C, the thermal curve is linear — losing roughly 7 A per 5 °C step — which matters if the disconnector sits near heat sources like transformers or drives. Maximum power loss is 57 W, which should be factored into panel thermal calculations if multiple units are ganged. No official successor has been issued — this is the active version. For BOM freeze or PCN watch, the SENTRON 3VA platform is Siemens' current MCCB family, so no near-term phase-out is signaled. ## Integration Notes Dimensions: 105 mm wide, 158 mm high, 70 mm deep. Front terminals accept busbar connections for the main circuit; the auxiliary contact block (2 CO + 1 trip alarm) is integrated. The undervoltage release (UVR) is a separate coil that drops the switch when control voltage falls below dropout threshold. It has no leading contact, so the UVR and main contacts open simultaneously — no early-break auxiliary. Verify the 24 V DC supply polarity and free-wheel diode for the UVR coil. Optional motor drive is available as a field-installable extension, enabling remote switching. The trip indicator provides local mechanical flag for open/closed status.","metaTitle":"Siemens 3VA1225-1AA32-0BH0 SENTRON Switch Disconnector, 250","metaDescription":"Siemens SENTRON 3VA1225-1AA32-0BH0 3-pole switch disconnector, 250 A rated current, undervoltage release 24 V DC, busbar connection. Current lifecycle. 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":"105 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":"Yes","Number Of Poles":"3","Product version":"in MCCB design","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Switch disconnector","Undervoltage Release":"Yes","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","Design Of The Auxiliary Release":"Undervoltage release (UVR)","Tension assignée d'isolement Ui":"800 V","protection class IP / on the front":"IP40","reference code / acc. to IEC 81346-2":"Q","Max. rated operational voltage Ue with DC":"500 V","Product Function / Communication Function":"No","Undervoltage Release With Leading Contact":"No","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=569248&mlfb=3VA1225-1AA32-0BH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-1AA32-0BH0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1225-1AA32-0BH0 and get a price?","answer":"This part is sourced and quoted to order through independent distribution. Submit an RFQ for current pricing and availability — confirmed at quote time."},{"question":"What are the key ratings for 3VA1225-1AA32-0BH0?","answer":"It is a 3-pole switch disconnector rated 250 A continuous (flat to 50 °C, derated above), with an undervoltage release 24 V DC, 2 auxiliary switches + 1 trip alarm, busbar connection, and IP40 front protection."},{"question":"Will 3VA1225-1AA32-0BH0 fit in a panel specified for a 5SQ2370-2YA05?","answer":"No — the 5SQ2370-2YA05 is a 0.5 A miniature circuit breaker (MCB) in a different form factor (55 mm depth, IP20, DIN-rail width units). The 3VA1225-1AA32-0BH0 is a 250 A MCCB-style switch disconnector (70 mm depth, 105 mm width, IP40 front). They are not footprint-compatible without panel rework."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-1AA32-0BH0","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/3VA1225-1AA32-0BH0 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}}