{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-4EF42-0CA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-4EF42-0CA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-4EF42-0CA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4EF42-0CA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-4EF42-0CA0, molded case circuit breaker, 4-pole, 250 A, line protection version with TM240 overcurrent release, breaking capacity 121 kA at 240 V.","salesMarkdown":"Breaking capacity runs from 121 kA at 240 V down to 11.9 kA at 690 V — high enough for most secondary distribution and large motor branch circuits where fault current is substantial. The 70 mm depth and 140 mm width fit standard SENTRON panel cutouts; verify the 158 mm height against your enclosure depth before committing the gland plate. These are Icu (ultimate breaking capacity) values; the MCCB is rated to interrupt once at these levels and remain functional afterward. ## Thermal derating — the real continuous current in a warm panel Rated 250 A continuous up to 50 °C ambient. Above that the TM240 release 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. ## What's on the nameplate — traceability checkpoints Brand SENTRON, product designation molded case circuit breaker, version line protection. Four poles, 250 A continuous, rated insulation voltage 800 V. Undervoltage release is built in; no auxiliary contacts, no communication module, no ground fault monitoring, no voltage trigger, no phase failure detection.","metaTitle":"Siemens 3VA1225-4EF42-0CA0 SENTRON MCCB, 250 A, 4-Pole, Line","metaDescription":"Siemens SENTRON 3VA1225-4EF42-0CA0 molded case circuit breaker, 250 A rated continuous current, 4-pole, line protection version with TM240 release. Breaking capacity 121 kA at 240","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":"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":"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":"Without","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":"3VA9608-0BB24","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":"0","Protective function of the overcurrent release":"LI","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=568517&mlfb=3VA1225-4EF42-0CA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4EF42-0CA0/alternatives.json"},"ai":{"faq":[{"question":"How do I get pricing and availability for 3VA1225-4EF42-0CA0?","answer":"Sourced and quoted to order through independent distribution; submit an RFQ for current pricing and availability confirmed at quote time."},{"question":"Will 3VA1225-4EF42-0CA0 drop into a panel specified around 3VA1010-2ED32-0JA0?","answer":"No — the 3VA1225-4EF42-0CA0 is physically larger (250 A frame vs 100 A frame) and will not fit the same cutout or bus connection without panel modification."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-4EF42-0CA0","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/3VA1225-4EF42-0CA0 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}}