{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-5FF42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-5FF42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-5FF42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5FF42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON molded case circuit breaker, 3VA1225-5FF42-0AA0, 250 A, 4-pole, TM240 overcurrent release, line protection version.","salesMarkdown":"The TM240 thermal-magnetic fixed release means the thermal element is calibrated for 250 A; the magnetic short-circuit pickup is fixed at the factory. Breaking capacity is the headline spec: 187 kA at 240 V AC, 121 kA at 415 V AC, 75.6 kA at 440 V AC, 30 kA at 500 V AC, and 17 kA at 690 V AC. At 240 V this breaker handles the highest fault currents found on large transformer secondaries or industrial services. ## Derating and duty profile Above that it derates: 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C. If your panel ambient runs 60 °C, the breaker effectively becomes a 237 A device — factor that into the load schedule. The TM240 release does not have adjustable thermal or magnetic settings; if you need a different trip curve, swap the breaker. Maximum power loss is 57 W — heatsink that into the enclosure volume. ## Panel integration The breaker measures 140 mm wide × 158 mm high × 70 mm deep — a compact four-pole footprint for a 250 A MCCB. Front IP40 protects against tool entry; the enclosure must be rated for the overall panel IP class. An optional motor drive (listed as a product extension) allows remote closing — useful for emergency-stop reset or automated transfer schemes.","metaTitle":"Siemens SENTRON 3VA1225-5FF42-0AA0 MCCB, 250 A, 4-Pole, 187","metaDescription":"Siemens SENTRON 3VA1225-5FF42-0AA0 molded case circuit breaker, 250 A rated current, 4-pole, TM240 release. Breaking capacity 187 kA at 240 V. Sourced to order against an 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","Height":"158 mm","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","Number Of Poles":"4","Product version":"Line protection","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","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","rated insulation voltage Ui":"800 V","Courant permanent assigné Iu":"250 A","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","design of the N-conductor protection":"50%","Max. rated operational voltage Ue with DC":"600 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","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":"0","Switching Capacity Class Of The Circuit Breaker":"M","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=490457&mlfb=3VA1225-5FF42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5FF42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA1225-5FF42-0AA0?","answer":"Submit an RFQ through this listing. The part is sourced to order through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What is 3VA1225-5FF42-0AA0's listed depth?","answer":"70 mm — that is the dimension from the mounting surface to the front face of the breaker."},{"question":"What is 3VA1225-5FF42-0AA0's listed width?","answer":"140 mm — standard four-pole MCCB width for the 3VA frame size."},{"question":"What compliance documentation does this brand provide for 3VA1225-5FF42-0AA0?","answer":"The SENTRON series typically carries IEC 60947-2 certification for molded case circuit breakers. Specific compliance documents (RoHS, REACH, UL) should be requested at quote time — the evidence does not list them directly."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-5FF42-0AA0","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/3VA1225-5FF42-0AA0 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}}