{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-4EF42-0AH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-4EF42-0AH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-4EF42-0AH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4EF42-0AH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-4EF42-0AH0, molded case circuit breaker, 4-pole, TM240 thermal-magnetic release, 250 A at 40 °C, rated insulation voltage 800 V, SCCR 121 kA at 240 V.","salesMarkdown":"The interrupting ratings hit 121 kA at 240 V AC and 75.6 kA at 415 V AC, giving real headroom for high-fault installations like industrial mains or transformer feeders. ## SCCR and selectivity With 121 kA at 240 V and 75.6 kA at 415 V, this MCCB handles high available fault current without upstream fusing. The 4-pole construction suits three-phase plus neutral or switched-neutral applications. The TM240 release provides thermal-magnetic overload and short-circuit protection, adjustable via the rating plug. The 57 W maximum power loss is manageable for enclosed panel layouts but should be considered in sealed, high-density cabinets. The breaker measures 70 mm deep, 140 mm wide, and 158 mm high. The 4-pole width of 140 mm is standard for this frame size, so it fits existing SENTRON panel cutouts and busbar systems. ## Auxiliary and alarm contacts The auxiliary contacts signal the breaker's open/closed position; the trip alarm switch indicates a fault trip. No undervoltage release or ground-fault module is included — those are add-on accessories if needed.","metaTitle":"Siemens 3VA1225-4EF42-0AH0 SENTRON MCCB, 250 A, 4-Pole, 121","metaDescription":"Siemens SENTRON 3VA1225-4EF42-0AH0 molded case circuit breaker, 250 A, 4-pole, TM240 release. SCCR 121 kA at 240 V. Active production. Sourced to order. Request quote.","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","Maximum":"0 A","Minimum":"0 A","at 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 kA","at 500 V":"17 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 A","at 60 °C":"237 A","at 65 °C":"230 A","at 70 °C":"223 A","Depth [In]":"2.76 in","Width [In]":"5.51 in","Height [In]":"6.22 in","Trip Indicator":"Yes","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Line protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"57 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA12254EF420AA0","Design Of The Auxiliary Switch":"2 auxiliary switches + 1 trip alarm switch HQ","Ground-Fault Monitoring Version":"Without","Insulation Voltage / Rated Value":"800 V","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","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"600 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"3","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","Switching Capacity Class Of The Circuit Breaker":"S","Mechanical Service Life (Operating Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"nut keeper kit on both ends","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal"}},"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=568512&mlfb=3VA1225-4EF42-0AH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4EF42-0AH0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1225-4EF42-0AH0 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote (RFQ) to receive current pricing and availability."},{"question":"What are the key ratings of the 3VA1225-4EF42-0AH0?","answer":"It is a 4-pole MCCB with a TM240 release, rated 250 A at 40 °C, with interrupting capacity of 121 kA at 240 V and 75.6 kA at 415 V. Rated insulation voltage is 800 V."},{"question":"What is the depth of the 3VA1225-4EF42-0AH0?","answer":"The depth is 70 mm (2.76 in)."},{"question":"What is the width of the 3VA1225-4EF42-0AH0?","answer":"The width is 140 mm (5.51 in)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-4EF42-0AH0","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/3VA1225-4EF42-0AH0 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}}