{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-6EF42-0AC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-6EF42-0AC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-6EF42-0AC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-6EF42-0AC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-6EF42-0AC0, molded case circuit breaker, 4-pole, 250 A rated at 40 °C, TM240 thermal-magnetic release, line protection design.","salesMarkdown":"The Siemens SENTRON 3VA1225-6EF42-0AC0 is a 4-pole molded case circuit breaker (MCCB) rated 250 A at 40 °C, fitted with a TM240 thermal-magnetic overcurrent release. Breaking capacity runs 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 — that covers most industrial service-entrance and feeder applications where high fault current is expected. ## Current derating and thermal profile Rated current holds at 250 A from 40 °C through 50 °C, then steps down: 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C. For a panel running warm — say 55 °C ambient inside the enclosure — the breaker still delivers 243 A continuous without nuisance tripping. ## Auxiliary switching and accessories The breaker ships with two HQ auxiliary switches fitted (design of the auxiliary switch: 2 auxiliary switches HQ). The supplied basic switch order code is 3VA12256EF420AA0. Footprint: 140 mm wide, 158 mm tall, 70 mm deep. That 140 mm width for a 4-pole frame is standard for SENTRON 3VA molded case breakers — it occupies the same mounting pattern as other 4-pole units in the series, so a panel laid out for a 3VA1110 4-pole will accept this 250 A frame without drilling new holes.","metaTitle":"Siemens 3VA1225-6EF42-0AC0 SENTRON MCCB, 250A, 4-Pole, TM240","metaDescription":"Siemens SENTRON 3VA1225-6EF42-0AC0 molded case circuit breaker, 250 A rated at 40 °C, 4-pole, TM240 thermal-magnetic release, 220 kA at 240 V. Active production. Sourced to order a","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":"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":"3VA12256EF420AA0","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","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":"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=568831&mlfb=3VA1225-6EF42-0AC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-6EF42-0AC0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA1225-6EF42-0AC0 at 415 V?","answer":"Breaking capacity is 154 kA at 415 V, with higher ratings at lower voltages (220 kA at 240 V) and lower ratings at higher voltages (75.6 kA at 440 V, 30 kA at 500 V, 17 kA at 690 V)."},{"question":"What does the TM240 release mean on this MCCB?","answer":"TM240 is a thermal-magnetic overcurrent release with a fixed thermal pickup of 240 A — the breaker is rated 250 A at 40 °C but the release element is calibrated to 240 A continuous, providing a margin against nuisance tripping at elevated ambients."},{"question":"Where can I buy 3VA1225-6EF42-0AC0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-6EF42-0AC0","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/3VA1225-6EF42-0AC0 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}}