{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-6EF42-0BC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-6EF42-0BC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-6EF42-0BC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-6EF42-0BC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-6EF42-0BC0, 4-pole molded case circuit breaker, 250 A at 40 °C, 220 kA interrupting at 240 V, line protection design with undervoltage release and 2 auxiliary switches.","salesMarkdown":"The Siemens 3VA1225-6EF42-0BC0 is a SENTRON 4-pole molded case circuit breaker (MCCB) rated for 250 A continuous at 40 °C, with a 220 kA interrupting capacity at 240 V. It's designed for line protection, so its trip curve and construction are tuned to protect feeders and main buses, not individual motor loads. It comes with an undervoltage release (UVR) built in, which drops the breaker if supply voltage falls below a threshold — a standard requirement for safety circuits on conveyors and presses so the equipment can't auto-restart after a brownout. Two HQ auxiliary switches are integrated. ## Sizing and thermal performance At 55 °C it's still good for 243 A, at 60 °C it's 237 A, and at 65 °C it's 230 A. At the maximum operating temperature of 70 °C it's rated for 223 A. That's a shallow derating curve; you don't lose much headroom even in a hot panel next to drives or transformers. ## Interrupting ratings across voltages The interrupting capacity scales with system voltage: 220 kA at 240 V, 154 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V. At 480 V the figure sits between the 440 V and 500 V numbers, so you're looking at roughly 50 kA class — solid for most 480 V distribution panels.","metaTitle":"Siemens 3VA1225-6EF42-0BC0 SENTRON MCCB, 250A, 4-Pole, 220kA","metaDescription":"Siemens 3VA1225-6EF42-0BC0 SENTRON 4-pole MCCB, 250A rated at 40°C, 220 kA breaking at 240 V. Active production. Quoted on request.","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":"220 kA","at 415 V":"154 kA","at 440 V":"75.6 kA","at 500 V":"30 kA","at 690 V":"17 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":"No","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"Yes","Design Of The Product":"Line protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"59.5 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA12256EF420AA0","Design Of The Auxiliary Switch":"2 auxiliary switches HQ","Design Of The Auxiliary Release":"undervoltage release (UVR)","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","Of The Integrated Auxiliary Trip Unit":"3VA9608-0BB11","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":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","Switching Capacity Class Of The Circuit Breaker":"H","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=568839&mlfb=3VA1225-6EF42-0BC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-6EF42-0BC0/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-6EF42-0BC0","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/3VA1225-6EF42-0BC0 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}}