{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-5EF42-0AC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-5EF42-0AC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-5EF42-0AC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5EF42-0AC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-5EF42-0AC0, molded case circuit breaker, 4-pole, TM240 thermal-magnetic release, 250 A at 40 °C, 121 kA at 415 V.","salesMarkdown":"## Siemens 3VA1225-5EF42-0AC0 — 250 A SENTRON MCCB with TM240 Release It carries a continuous current of 250 A at 40 °C, derating to 223 A at 70 °C, and its interrupting capacity reaches 121 kA at 415 V AC — enough to handle high-fault industrial feeds without cascading upstream breakers. The TM240 release combines a thermal bimetal for overload protection and a magnetic coil for short-circuit response, set at 240 A nominal. ## Breaking Capacity at Common Distribution Voltages This MCCB's interrupting capacity varies with system voltage: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V. The breaker holds its full 250 A rating from 40 °C through 50 °C, then derates linearly to 223 A at 70 °C. In a panel with multiple breakers ganged together, the 57 W heat dissipation per unit adds up — account for it in the enclosure's thermal budget.","metaTitle":"Siemens 3VA1225-5EF42-0AC0 SENTRON MCCB, 250A, 4-Pole, TM240","metaDescription":"Siemens 3VA1225-5EF42-0AC0 SENTRON molded case circuit breaker, 250 A at 40 °C, 4-pole, TM240 thermal-magnetic release, 121 kA at 415 V. Active production, 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","Maximum":"0 A","Minimum":"0 A","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"75.6 kA","at 500 V":"30 kA","at 690 V":"17 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]":"5.51 in","Height [In]":"6.22 in","Trip Indicator":"No","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Line protection","Communication Function":"No","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","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA12255EF420AA0","Design Of The Auxiliary Switch":"2 auxiliary switches HQ","Ground-Fault Monitoring Version":"Without","Insulation Voltage / Rated Value":"800 V","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","design of the N-conductor protection":"without","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"600 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","Switching Capacity Class Of The Circuit Breaker":"M","Mechanical Service Life (Operating 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"}},"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=568685&mlfb=3VA1225-5EF42-0AC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5EF42-0AC0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1225-5EF42-0AC0 and get a price?","answer":"The part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the closest functional second-source to 3VA1225-5EF42-0AC0?","answer":"The 3VA1110-5ED36-0AC0 is a smaller-frame SENTRON MCCB with a lower current rating and different trip curve. It will not drop into the same panel cutout or match the 250 A continuous rating of the 3VA1225-5EF42-0AC0 without rewiring and re-evaluating the fault-current withstand."},{"question":"What is the depth of 3VA1225-5EF42-0AC0?","answer":"The depth is 70 mm (2.76 in)."},{"question":"What is the width of 3VA1225-5EF42-0AC0?","answer":"The width is 140 mm (5.51 in)."},{"question":"Will 3VA1225-5EF42-0AC0 drop into a panel specified for 3VA1110-5ED36-0AC0?","answer":"No. The 3VA1225-5EF42-0AC0 is a physically larger frame — 140 mm wide versus the smaller-frame 3VA1110 — and carries a 250 A rating versus the lower-rated sibling. Panel cutouts and bus connections differ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-5EF42-0AC0","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/3VA1225-5EF42-0AC0 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}}