{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-6FF42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-6FF42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-6FF42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-6FF42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-6FF42-0AA0, molded case circuit breaker, 4-pole, 125 A, TM240 thermal-magnetic trip unit, 220 kA at 240 V AC.","salesMarkdown":"Its TM240 thermal-magnetic trip unit provides fixed overload and short-circuit protection without undervoltage or ground-fault monitoring — a straightforward fit for main or feeder breaker duty where selectivity coordination is the priority. ## Interrupting capacity and selectivity headroom At 240 V the breaker clears 220 kA, dropping to 154 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V. The breaker carries 250 A through 50 °C ambient, then derates to 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C. The 70 mm depth, 140 mm width, and 158 mm height fit standard Siemens SENTRON mounting footprints — verify the existing bus-bar drill pattern if retrofitting into a third-party panel. ## Environmental and compliance range","metaTitle":"Siemens 3VA1225-6FF42-0AA0 SENTRON MCCB, 125 A, 4-Pole, TM24","metaDescription":"Siemens SENTRON 3VA1225-6FF42-0AA0 molded case circuit breaker, 125 A, 4-pole, TM240 trip unit. 220 kA at 240 V. Active production. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"140 mm","title":"3VA1225-6FF42-0AA0","Height":"158 mm","Maximum":"125 A","Minimum":"125 A","at 240 V":"220 kA","at 415 V":"154 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","description":"circuit breaker 3VA1 IEC frame 250 breaking capacity class H Icu=70kA @ 415V 4-pole, line protection TM240, ATAM, In=250A overload protection Ir=175A...250A short-circuit protection Ii=5...10 x In N conductor protection 50% nut keeper kit","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","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":"50%","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":"0","Switching Capacity Class Of The Circuit Breaker":"H","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/fcc1cca808324d048c7cba49f38d4bfd.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=507271&mlfb=3VA1225-6FF42-0AA0"},"ai":{"faq":[{"question":"Where can I buy 3VA1225-6FF42-0AA0 and how do I get a price?","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 quote."},{"question":"What is the interrupting capacity of 3VA1225-6FF42-0AA0 at 240 V?","answer":"At 240 V the breaker clears 220 kA, dropping to 154 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V."},{"question":"What trip unit does 3VA1225-6FF42-0AA0 use?","answer":"It uses a TM240 thermal-magnetic trip unit — fixed overload and short-circuit protection, no undervoltage release or ground-fault monitoring."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-6FF42-0AA0","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/3VA1225-6FF42-0AA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}