{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-4GF42-0DH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-4GF42-0DH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-4GF42-0DH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4GF42-0DH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON molded case circuit breaker, 3VA1225-4GF42-0DH0, 250 A rated continuous current, 4-pole, line protection, TM240 thermal-magnetic release, 121 kA breaking capacity at 240 V.","salesMarkdown":"## What this 250 A MCCB carries — and where the rating matters Breaking capacity is 121 kA at 240 V, 75.6 kA at 415 V, 25 kA at 440 V, and 11.9 kA at 690 V — so the available fault current at the panelboard determines which voltage column governs the install. Above that, derating is linear: 243.3 A at 55 °C, 236.5 A at 60 °C, 229 A at 65 °C, and 223 A at 70 °C. The UVR coil drops the breaker on loss of control voltage — standard for emergency-stop or undervoltage protection schemes. Dimensions: 158 mm height, 140 mm width, 70 mm depth. The 4-pole footprint matches standard SENTRON 3VA frame spacing; verify busbar or lug kit compatibility with the existing distribution board. ## N-conductor protection and mechanical endurance N-conductor protection is rated at 100% — full-rated neutral pole, not reduced. Mechanical endurance is 15 000 operations, which suits frequent switching applications like capacitor bank or lighting control, not just infrequent fault protection.","metaTitle":"Siemens SENTRON 3VA1225-4GF42-0DH0 MCCB, 250A, 4-Pole, 121kA","metaDescription":"Siemens SENTRON 3VA1225-4GF42-0DH0 molded case circuit breaker, 250A rated continuous current, 4-pole, line protection, TM240 release, 121kA at 240V. Current lifecycle stage, avail","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":"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":"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":"3","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","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=568648&mlfb=3VA1225-4GF42-0DH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4GF42-0DH0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1225-4GF42-0DH0 and what is the lead time?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or lead-time figure is published here."},{"question":"What is the breaking capacity of 3VA1225-4GF42-0DH0 at different voltages?","answer":"Breaking capacity is 121 kA at 240 V, 75.6 kA at 415 V, 25 kA at 440 V, and 11.9 kA at 690 V. The applicable rating depends on the system voltage where the breaker is installed."},{"question":"What auxiliary contacts does 3VA1225-4GF42-0DH0 include?","answer":"It comes with 2 auxiliary switches plus 1 trip alarm switch (HQ configuration), plus an undervoltage release (UVR). The integrated auxiliary trip order code is 3VA9608-0BB25."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-4GF42-0DH0","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/3VA1225-4GF42-0DH0 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}}