{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-6EF42-0DH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-6EF42-0DH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-6EF42-0DH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-6EF42-0DH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-6EF42-0DH0, molded case circuit breaker, 4-pole, line protection, rated 250 A, TM240 release, 220 kA at 240 V.","salesMarkdown":"The Siemens SENTRON 3VA1225-6EF42-0DH0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, with a continuous current Iu of 250 A and a TM240 thermal-magnetic overcurrent release. Its headline breaking capacity hits 220 kA at 240 V — that means it can safely interrupt fault currents up to that level without upstream cascading, critical for high-fault panels close to the transformer. ## Breaking capacity across voltage levels Breaking capacity drops as voltage rises: 154 kA at 415 V, 36 kA at 440 V, and 17 kA at 690 V. The 415 V figure covers most European industrial mains; the 690 V rating suits wind or marine distribution where higher line voltages are common. Rated insulation voltage is 800 V, so the breaker is designed for 690 V systems with margin. ## Thermal derating and operating range Rated continuous current holds at 250 A up to 50 °C ambient. Above that it derates: 243.3 A at 55 °C, 236.5 A at 60 °C, 229 A at 65 °C, and 223 A at 70 °C. If the panel ambient runs hot, size the load to the derated figure — the 70 °C limit matches the maximum operating temperature, so the breaker can sit in a sealed enclosure without losing its calibration. ## Panel fit and auxiliary wiring Footprint: 140 mm wide, 158 mm high, 70 mm deep. Fits standard SENTRON 3VA panel cutouts. The integrated auxiliary contact block is configured as 2 auxiliary switches plus 1 trip alarm switch (HQ version), and the unit includes an undervoltage release (UVR) — wired separately to a control voltage. If the control supply drops, the UVR trips the breaker, providing undervoltage protection for downstream loads.","metaTitle":"Siemens SENTRON 3VA1225-6EF42-0DH0 MCCB, 250 A, 220 kA at 24","metaDescription":"Siemens SENTRON 3VA1225-6EF42-0DH0 molded case circuit breaker, 250 A rated, 220 kA breaking at 240 V. Active production. Sourced to order against RFQ.","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":"220 kA","at 415 V":"154 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":"Yes","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Auxiliary contact version":"2 auxiliary switches + 1 trip alarm switch HQ","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":"Undervoltage release (UVR)","Ground fault monitoring version":"Without","Of The Integrated Auxiliary Trip":"3VA9608-0BB25","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":"3","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","Switching capacity class of the circuit breaker":"H","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=568846&mlfb=3VA1225-6EF42-0DH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-6EF42-0DH0/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for 3VA1225-6EF42-0DH0?","answer":"Rated continuous current Iu is 250 A, breaking capacity is 220 kA at 240 V, 154 kA at 415 V, 36 kA at 440 V, and 17 kA at 690 V. Rated insulation voltage is 800 V."},{"question":"What is the depth of 3VA1225-6EF42-0DH0?","answer":"Depth is 70 mm, width 140 mm, height 158 mm."},{"question":"Where can I buy 3VA1225-6EF42-0DH0?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-6EF42-0DH0","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/3VA1225-6EF42-0DH0 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}}