{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-4EF32-0AJ0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-4EF32-0AJ0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-4EF32-0AJ0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4EF32-0AJ0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-4EF32-0AJ0, molded case circuit breaker, 3-pole, 250 A at 40 °C, line protection, 70 mm depth, 105 mm width.","salesMarkdown":"This places it as a main or feeder breaker in a 400 V distribution panel, sized for loads up to that thermal threshold before derating. The 250 A rating holds flat from 40 °C through 50 °C, then steps down to 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C — a derating curve that matters when the breaker sits in a warm enclosure alongside other heat sources. Breaking capacity is specified across five voltage levels: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, 17 kA at 500 V, and 11.9 kA at 690 V. At 415 V — the common low-voltage distribution voltage in many regions — the 75.6 kA interrupting rating gives substantial fault-current headroom for most industrial service entrances or large sub-distribution boards. Dimensions are 70 mm depth, 105 mm width, and 158 mm height. The 70 mm depth keeps the breaker within typical distribution board clearance, allowing front-connection cabling without forcing a deeper enclosure.","metaTitle":"Siemens 3VA1225-4EF32-0AJ0 SENTRON MCCB, 250 A, 3-Pole, 70 m","metaDescription":"Siemens SENTRON 3VA1225-4EF32-0AJ0 molded case circuit breaker, 250 A rated at 40 °C, 3-pole, line protection. Breaking capacity 121 kA at 240 V. Active lifecycle, available to ord","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 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 kA","at 500 V":"17 kA","at 690 V":"11.9 kA","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","Depth [In]":"2.76 in","Width [In]":"4.13 in","Height [In]":"6.22 in","Trip Indicator":"Yes","Number Of Poles":"3","Product version":"Line protection","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","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 HP","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","rated insulation voltage Ui":"800 V","Of The Supplied Basic Switch":"3VA12254EF320AA0","Courant permanent assigné Iu":"250 A","Design Of The Auxiliary Release":"without auxiliaryrelease","Ground-Fault Monitoring Version":"Without","Design Of The Overcurrent Release":"TM240","Design Of Short-Circuit Protection":"For switching power values in DC networks, see the 3VA molded case circuit breaker device manual; link to be found under Service & Support in the last chapter","protection class IP / on the front":"IP40","Max. rated operational voltage Ue with DC":"500 V","Undervoltage Release With Leading Contact":"No","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Adjustable response value current / lg min.":"1","Adjustable response value current / li max.":"2 500 A","Adjustable response value current / li min.":"1 250 A","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"3","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB11","Switching Capacity Class Of The Circuit Breaker":"S","Max. rated operational current of the frame size":"250 A","Mechanical Service Life (Switching Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"nut keeper kit on both ends","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal","Type of connectable conductor cross-section, connection screw, width x thickness , max.":"25 x 8 mm","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"13 x 1 mm"}},"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=568487&mlfb=3VA1225-4EF32-0AJ0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4EF32-0AJ0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA1225-4EF32-0AJ0 at 415 V?","answer":"At 415 V the interrupting rating is 75.6 kA, which covers most industrial fault-current scenarios at that voltage level. At 240 V it rises to 121 kA, and at 690 V it drops to 11.9 kA."},{"question":"What are the physical dimensions of this MCCB?","answer":"Depth is 70 mm, width is 105 mm, and height is 158 mm. The width corresponds to a standard 3-pole DIN-rail footprint."},{"question":"Where can I buy 3VA1225-4EF32-0AJ0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. 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/3VA1225-4EF32-0AJ0","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/3VA1225-4EF32-0AJ0 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}}