{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-4GF42-0CA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-4GF42-0CA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-4GF42-0CA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4GF42-0CA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-4GF42-0CA0, molded case circuit breaker, 250 A, 4-pole, TM240 release, 121 kA at 240 V, undervoltage release, IP40 front.","salesMarkdown":"It carries 121 kA interrupting capacity at 240 V, 75.6 kA at 415 V, 25 kA at 440 V, and 11.9 kA at 690 V — the 240 V figure is the one that governs most North American panel schedules, while the 415 V rating is the one for 400 V-class European distribution. Above 50 °C it drops linearly to 223 A at 70 °C. That matters if the breaker sits near a heat source or in a non-ventilated enclosure; at 55 °C you still have 243.3 A, so a 250 A feeder is still viable in a warm cabinet. N-conductor protection is 100% rated, meaning the fourth pole handles full current, not a reduced neutral. No auxiliary contact version is fitted; if you need status feedback, the integrated undervoltage release (UVR) can be wired into a control circuit, or you add the optional auxiliary trip accessory 3VA9608-0BB24. Latching endurance is 15,000 operations — not a switching breaker for frequent load making/breaking, but fine for infrequent manual isolation and fault clearing.","metaTitle":"Siemens 3VA1225-4GF42-0CA0 SENTRON MCCB, 250 A, 4-Pole, 121","metaDescription":"Siemens SENTRON 3VA1225-4GF42-0CA0 molded case circuit breaker, 250 A continuous, 4-pole, 121 kA at 240 V. TM240 release, undervoltage release included. Current lifecycle. Quoted t","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":"100%","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=568543&mlfb=3VA1225-4GF42-0CA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4GF42-0CA0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting capacity at 415 V for this MCCB?","answer":"75.6 kA at 415 V, which covers most 400 V-class distribution systems. At 240 V it is 121 kA, at 440 V it is 25 kA, and at 690 V it is 11.9 kA."},{"question":"Does this breaker include an undervoltage release?","answer":"Yes, an undervoltage release (UVR) is integrated. No auxiliary contacts or communication module are fitted."},{"question":"What is the thermal derating above 50 °C?","answer":"Rated 250 A continuously from 40 °C to 50 °C. At 55 °C it derates to 243.3 A, at 60 °C to 236.5 A, at 65 °C to 229 A, and at 70 °C to 223 A."},{"question":"Where can I buy 3VA1225-4GF42-0CA0?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-4GF42-0CA0","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/3VA1225-4GF42-0CA0 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}}