{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-4EF32-0KB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-4EF32-0KB0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-4EF32-0KB0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4EF32-0KB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-4EF32-0KB0, molded case circuit breaker, 3-pole, 250 A, 70 mm depth, 105 mm width, 158 mm height, with shunt trip release.","salesMarkdown":"It's the kind of breaker you spec into a panel when you need one device to handle both the load current and a hard fault without welding its contacts shut. ## Interrupting capacity — what those voltage columns mean At 240 V it's rated for 121 kA — enough for a high-capacity transformer secondary. At 415 V it handles 75.6 kA, at 440 V it's 52.5 kA, at 500 V it drops to 17 kA, and at 690 V it's 11.9 kA. Match the voltage you actually run, not the highest number on the nameplate. ## Thermal derating — the current it carries when the panel gets hot Above that it starts to derate: 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C. ## Shunt trip release — what it adds to the breaker That means you can trip the breaker remotely by applying a control voltage to the shunt trip coil — useful for emergency-stop circuits, undervoltage protection, or a PLC-driven shutdown. No undervoltage release is fitted from the factory, so if you need UVR you'll add it in the field or order a different variant. ## Physical fit — panel and enclosure dimensions Width 105 mm, height 158 mm, depth 70 mm. Maximum power loss is 57 W.","metaTitle":"Siemens 3VA1225-4EF32-0KB0 SENTRON MCCB, 250A 3-Pole, 121kA","metaDescription":"Siemens 3VA1225-4EF32-0KB0 SENTRON molded case circuit breaker. 250A continuous, 3-pole, 121kA interrupting at 240V. Shunt trip release included. Sourced to order against RFQ.","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":"Yes","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 HP","Design Of The Auxiliary Release":"shunt trip (STL)","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","Of The Integrated Auxiliary Trip Unit":"3VA9688-0BL33","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":"3VA9988-0AA11","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=1356938&mlfb=3VA1225-4EF32-0KB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4EF32-0KB0/alternatives.json"},"ai":{"faq":[{"question":"What does the shunt trip release do on this breaker?","answer":"The shunt trip (STL) lets you trip the breaker remotely by applying a control voltage to its coil — used for emergency-stop circuits or PLC-driven shutdowns. Two auxiliary switches provide status feedback."},{"question":"What is the depth of 3VA1225-4EF32-0KB0?","answer":"The depth is 70 mm (2.76 inches). That's the dimension from the mounting surface to the front of the breaker body."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-4EF32-0KB0","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/3VA1225-4EF32-0KB0 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}}