{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-4GF42-0DC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-4GF42-0DC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-4GF42-0DC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4GF42-0DC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-4GF42-0DC0, molded case circuit breaker, 4-pole, 250 A rated continuous current, TM240 overcurrent release, line protection version, 70 mm depth.","salesMarkdown":"The Siemens 3VA1225-4GF42-0DC0 is a 4-pole SENTRON molded case circuit breaker rated for 250 A continuous current (Iu) at 40 °C ambient — that's the full-load current it carries without tripping in a 40 °C panel environment. At 55 °C it derates to 243.3 A, at 70 °C to 223 A, so if your enclosure runs hot, you need to account for that thermal curve. Breaking capacity is the headline: 121 kA at 240 V, 75.6 kA at 415 V, 25 kA at 440 V, and 11.9 kA at 690 V. The TM240 overcurrent release is a thermal-magnetic type, so it handles overloads (thermal) and short circuits (magnetic) in one package. This is a line protection variant, not a motor protection or generator breaker — it's designed for feeder and distribution circuits. No communication module, no voltage trigger, no phase failure detection — this is a straightforward thermal-magnetic breaker with basic aux contacts and UVR for safety circuits. If you're evaluating the 3VA1112-5EF32-0CA0 as a potential second source or replacement, the key difference is current rating and frame size. The 3VA1225-4GF42-0DC0 is a 250 A frame; the 3VA1112 is a smaller 125 A frame. Both are 4-pole SENTRON line protection breakers with TM releases, but the 3VA1225 carries significantly higher interrupting capacity at the same voltage points. Panel cutouts and busbar spacing differ between the frame sizes — you can't drop a 250 A frame into a 125 A panel without reworking the bus connections and verifying the thermal rise. For a direct swap without rewiring, stick to the same frame size. The 70 mm depth leaves room for rear-access busbars or cable ducts behind the breaker. Wire the line side through the top terminals; load side exits the bottom. The undervoltage release coil draws from the control voltage — verify polarity if using DC control, and ensure the UVR supply is fused separately per Siemens guidelines. No communication module means no Modbus or PROFIBUS link — this is a standalone breaker.","metaTitle":"Siemens 3VA1225-4GF42-0DC0 SENTRON MCCB, 250 A, 4-Pole, 70 m","metaDescription":"Siemens 3VA1225-4GF42-0DC0 SENTRON molded case circuit breaker, 250 A rated, 4-pole, 121 kA at 240 V. Line protection with TM240 release and undervoltage release. Available to orde","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":"2 auxiliary switches 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":"2","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","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=568647&mlfb=3VA1225-4GF42-0DC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4GF42-0DC0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1225-4GF42-0DC0 and how do I get a price?","answer":"We source this part through independent distribution and quote it to order against an RFQ. Submit a request for current availability and pricing — confirmed at quote time."},{"question":"Will 3VA1225-4GF42-0DC0 drop into a panel specified around 3VA1112-5EF32-0CA0 without rewiring?","answer":"No. The 3VA1225 is a 250 A frame; the 3VA1112 is a 125 A frame. Different physical dimensions and busbar spacing mean you can't swap them without panel modifications."},{"question":"What is the breaking capacity of 3VA1225-4GF42-0DC0 at 415 V?","answer":"75.6 kA at 415 V. At 240 V it's 121 kA, at 440 V it's 25 kA, and at 690 V it's 11.9 kA."},{"question":"Does this breaker include an undervoltage release?","answer":"Yes, it comes with an undervoltage release (UVR) as standard. 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/3VA1225-4GF42-0DC0","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/3VA1225-4GF42-0DC0 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}}