{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-4EF32-0AC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-4EF32-0AC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-4EF32-0AC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4EF32-0AC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA series molded case circuit breaker, 3VA1225-4EF32-0AC0, 3-pole, 250 A at 40 °C, TM240 thermal-magnetic overcurrent release, line protection design, interrupting capacity 121 kA at 240 V AC.","salesMarkdown":"The 250 A rating holds flat from 40 °C to 50 °C, then derates to 243 A at 55 °C and 223 A at 70 °C (–), which matters if your panel runs hot or is in a non-climate-controlled enclosure. The TM240 thermal-magnetic release means the thermal trip follows a 240 A frame curve; the magnetic instantaneous pickup is fixed, not adjustable. ## Interrupting capacity — the number that decides selectivity This breaker's interrupting capacity changes significantly with system voltage. At 240 V it's rated 121 kA; at 415 V it drops to 75.6 kA; at 440 V to 52.5 kA; at 500 V to 17 kA; and at 690 V to 11.9 kA. For a 480 V panel (common in North America), interpolating between 440 V and 500 V gives roughly 35–40 kA available — adequate for most industrial services, but if your transformer feeds a high-fault bus (say 65 kA at 480 V), you'll need to step up to the 3VA2 high-capacity frame or add a current-limiting fuse ahead. ## Integration — panel fit and wiring Dimensions are 105 mm wide, 158 mm high, 70 mm deep. The auxiliary switch configuration is listed as 2 auxiliary switches HQ, which provides two form-C contacts for remote status indication (open/closed/tripped). No trip indicator and no voltage trigger — if you need a shunt trip or undervoltage release, this variant doesn't carry them; order the appropriate -0AA0 or -0AB0 suffix.","metaTitle":"SENTRON 3VA1225-4EF32-0AC0 MCCB, 250 A, 121 kA at 240 V","metaDescription":"Siemens SENTRON 3VA1225-4EF32-0AC0 molded case circuit breaker, 250 A at 40 °C, 3-pole, TM240 thermal-magnetic release. 121 kA interrupting at 240 V. Current production. Quoted on","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"105 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]":"4.13 in","Height [In]":"6.22 in","Trip Indicator":"No","Number Of Poles":"3","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":"3VA12254EF320AA0","Design Of The Auxiliary Switch":"2 auxiliary switches 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","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"500 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":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","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":"https://cdn.aoctrl.com/7e470507c9d8712c565979ccf06da9bb.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=568481&mlfb=3VA1225-4EF32-0AC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4EF32-0AC0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting capacity of 3VA1225-4EF32-0AC0 at 415 V?","answer":"At 415 V AC the interrupting capacity is 75.6 kA. At 240 V it is 121 kA, and at 690 V it drops to 11.9 kA."},{"question":"What is the thermal rating at 60 °C for this MCCB?","answer":"At 60 °C ambient the continuous current rating derates to 237 A, down from 250 A at 40–50 °C."},{"question":"Can 3VA1225-4EF32-0AC0 be used as a direct replacement for 3VA1110-5ED36-0AC0?","answer":"No — the 3VA1110-5ED36-0AC0 is a 100 A frame (based on the 1110 series designation) while this 3VA1225 is a 250 A frame. The 105 mm width is the same 3-pole footprint, but the 3VA1110 has lower interrupting ratings and different release settings. They are not drop-in substitutes without recalculating the protection coordination."},{"question":"Where can I buy 3VA1225-4EF32-0AC0 and how is it quoted?","answer":"This breaker is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — no stock count or lead-time figure is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-4EF32-0AC0","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/3VA1225-4EF32-0AC0 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}}