{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-5EF42-0AD0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-5EF42-0AD0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-5EF42-0AD0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5EF42-0AD0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-5EF42-0AD0, Molded case circuit breaker, 4-pole, 250 A at 40 °C, TM240 thermal-magnetic release, 187 kA at 240 V AC breaking capacity, line protection design.","salesMarkdown":"Its TM240 thermal-magnetic release provides overload and short-circuit protection for feeder circuits, with a rated current of 250 A at 40 °C ambient — the same rating holds at 45 °C and 50 °C, then derates to 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C. The 187 kA breaking capacity at 240 V AC means it can safely interrupt fault currents up to that level without upstream cascading; per the datasheet, the interrupting rating drops to 121 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V. The maximum power loss of 57 W is the heat dissipated at full rated current; panel ventilation or spacing should account for this to keep the ambient within the 70 °C operating maximum. This is a straightforward, rugged breaker for standard feeder protection where selectivity coordination is done via the trip curve.","metaTitle":"Siemens 3VA1225-5EF42-0AD0 SENTRON MCCB, 250A, 4P, 187kA at","metaDescription":"Siemens SENTRON 3VA1225-5EF42-0AD0 molded case circuit breaker, 250 A rated at 40°C, 4-pole, 187 kA breaking capacity at 240 V AC. TM240 thermal-magnetic release. Active production","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":"187 kA","at 415 V":"121 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":"3VA12255EF420AA0","Design Of The Auxiliary Switch":"3 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":"3","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","Switching Capacity Class Of The Circuit Breaker":"M","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=568686&mlfb=3VA1225-5EF42-0AD0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5EF42-0AD0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1225-5EF42-0AD0 and what is the lead time?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm lead time and price."},{"question":"What is the breaking capacity of 3VA1225-5EF42-0AD0 at different voltages?","answer":"At 240 V AC the interrupting rating is 187 kA; at 415 V it is 121 kA; at 440 V it is 75.6 kA; at 500 V it is 30 kA; and at 690 V it is 17 kA. These values are per the manufacturer's specification."},{"question":"Will 3VA1225-5EF42-0AD0 drop into a panel specified around 3VA1110-5EF32-0AM0?","answer":"Both belong to the same SENTRON 3VA family and share the same mounting footprint and DIN-rail profile, so physical fit is identical. However, the 3VA1225-5EF42-0AD0 is a 4-pole 250 A unit with a TM240 release, while the 3VA1110-5EF32-0AM0 is a different rating — verify the busbar ampacity and lug kit match the 250 A rating before substitution."},{"question":"What compliance documentation does Siemens provide for 3VA1225-5EF42-0AD0?","answer":"As a SENTRON MCCB, this part is designed to meet IEC 60947-2 and UL 489 standards. Siemens typically provides a declaration of conformity, CE marking, and RoHS/REACH compliance documentation with the shipment. Specific certs can be requested at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-5EF42-0AD0","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/3VA1225-5EF42-0AD0 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}}