{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-4EF32-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-4EF32-0AB0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-4EF32-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4EF32-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-4EF32-0AB0, molded case circuit breaker, 3-pole, 250 A, TM240 release, 121 kA at 240 V, 75.6 kA at 415 V, 25 kA at 440 V, 11.9 kA at 690 V.","salesMarkdown":"## SENTRON 3VA1225-4EF32-0AB0 — 250 A MCCB with TM240 Release Breaking capacity scales with system voltage: 121 kA at 240 V AC, 75.6 kA at 415 V, 25 kA at 440 V, and 11.9 kA at 690 V. That SCCR headroom covers most industrial fault-current scenarios without cascading upstream breakers. ## Current Rating Across Ambient Temperature Above that, it derates linearly: 243.3 A at 55 °C, 236.5 A at 60 °C, 229 A at 65 °C, and 223 A at 70 °C. In a hot rolling-mill panel near the furnace, that derating curve is what governs the real load it can carry — the 250 A nameplate only counts if you keep the enclosure below 50 °C. ## Physical Integration and Auxiliaries","metaTitle":"Siemens 3VA1225-4EF32-0AB0 SENTRON MCCB, 250 A, 3-Pole, 121","metaDescription":"Siemens SENTRON 3VA1225-4EF32-0AB0 molded case circuit breaker, 250 A rated, 3-pole, 121 kA at 240 V breaking capacity. TM240 release. Active production. Sourced 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 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"25 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":"243.3 A","at 60 °C":"236.5 A","at 65 °C":"229 A","at 70 °C":"223 A","Trip indicator":"No","Number of poles":"3","Product version":"Line protection","Voltage trigger":"No","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"15 000","Undervoltage Release":"No","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Auxiliary contact version":"2 auxiliary switches HP","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"250 A","Rated insulation voltage Ui":"800 V","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","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"1","Adjustable response value time / tr min.":"1","Max. rated operational voltage Ue with DC":"500 V","Undervoltage Release With Leading Contact":"No","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"250 A","Adjustable response value current / li max.":"2 500 A","Adjustable response value current / li min.":"1 250 A","Adjustable response value current / lr min.":"175 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"2","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA11","Switching capacity class of the circuit breaker":"S","Max. rated operational current of the frame size":"250 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"lug terminal","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","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"13 x 1"}},"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=568480&mlfb=3VA1225-4EF32-0AB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4EF32-0AB0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1225-4EF32-0AB0 and what is the lead time?","answer":"This part is quoted to order against an RFQ through our independent distribution channel. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm lead-time and price commitment."},{"question":"What is the breaking capacity of 3VA1225-4EF32-0AB0 at different voltages?","answer":"121 kA at 240 V AC, 75.6 kA at 415 V, 25 kA at 440 V, and 11.9 kA at 690 V — these figures determine the SCCR headroom for selectivity coordination in the distribution board."},{"question":"What compliance documentation is available for 3VA1225-4EF32-0AB0?","answer":"As a Siemens SENTRON MCCB, it carries the standard IEC/EN 60947-2 certifications, UL 489 listing, and CE marking. RoHS and REACH declarations are available from Siemens documentation resources."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-4EF32-0AB0","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/3VA1225-4EF32-0AB0 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}}