{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-5EF42-0AG0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-5EF42-0AG0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-5EF42-0AG0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5EF42-0AG0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-5EF42-0AG0, molded case circuit breaker, line protection, 4-pole, 250 A rated continuous current Iu, TM240 overcurrent release, 187 kA at 240 V, 121 kA at 415 V.","salesMarkdown":"The Siemens SENTRON 3VA1225-5EF42-0AG0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, carrying a rated continuous current Iu of 250 A. The interrupting ratings are 187 kA at 240 V AC and 121 kA at 415 V AC, so it can safely clear high-fault currents on industrial distribution without upstream cascading. ## Current-carrying capacity across temperature Full 250 A rating holds from 40 °C up to 50 °C ambient. Above that, the thermal trip curve derates: 243.3 A at 55 °C, 236.5 A at 60 °C, 229 A at 65 °C, and 223 A at 70 °C. Dimensions are 140 mm wide × 158 mm high × 70 mm deep. That 140 mm width is standard for a 4-pole MCCB in the 3VA frame — it needs a 4-module cutout on the DIN rail or mounting plate. ## Auxiliary contacts and release configuration The auxiliary contacts are useful for remote status indication or interlocking; the trip alarm signals that the breaker has opened on a fault.","metaTitle":"Siemens SENTRON 3VA1225-5EF42-0AG0 MCCB, 250 A, 4-Pole","metaDescription":"Siemens SENTRON 3VA1225-5EF42-0AG0 molded case circuit breaker, 250 A rated continuous current, 4-pole, line protection, TM240 release, 187 kA at 240 V. Current production. Quoted","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","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"36 kA","at 690 V":"17 kA","at 40 °C":"250 A","at 45 °C":"250 A","at 50 °C":"250 A","at 55 °C":"243.3 A","at 60 °C":"236.5 A","at 65 °C":"229 A","at 70 °C":"223 A","Trip indicator":"Yes","Number of poles":"4","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":"1 auxiliary switch + 1 trip alarm switch 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","Design of the N-conductor protection":"Without","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":"600 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":"3VA9988-0AB11","Switching capacity class of the circuit breaker":"M","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=568689&mlfb=3VA1225-5EF42-0AG0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5EF42-0AG0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1225-5EF42-0AG0 and how do I get a price?","answer":"This part is sourced through independent distribution and quoted to order against an RFQ. Send your quantity and target delivery window; availability and current pricing are confirmed at quote time."},{"question":"What are the interrupting ratings for 3VA1225-5EF42-0AG0?","answer":"187 kA at 240 V AC, 121 kA at 415 V AC, 36 kA at 440 V AC, and 17 kA at 690 V AC."},{"question":"What is the rated continuous current of this MCCB?","answer":"250 A at 40 °C to 50 °C ambient, derating to 223 A at 70 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-5EF42-0AG0","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/3VA1225-5EF42-0AG0 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}}