{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-5FF42-0KC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-5FF42-0KC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-5FF42-0KC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5FF42-0KC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-5FF42-0KC0, molded case circuit breaker, 4-pole, 125 A, breaking capacity 187 kA at 240 V AC, line protection design with shunt trip and 2 auxiliary switches.","salesMarkdown":"## MCCB for line protection — 125 A, 4-pole, high breaking capacity The Siemens SENTRON 3VA1225-5FF42-0KC0 is a 4-pole molded case circuit breaker rated at 125 A continuous, designed for line protection in distribution panels. Its breaking capacity reaches 187 kA at 240 V AC, 121 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V — figures that cover most industrial fault-current scenarios without needing an upstream current-limiting fuse. The breaker holds 250 A continuously at ambient temperatures up to 50 °C, then derates linearly to 223 A at 70 °C — critical when the breaker shares an enclosure with other heat sources. Operating range is -25 °C to +70 °C; storage range is -40 °C to +80 °C. Dimensions are 70 mm deep, 140 mm wide, 158 mm high — a standard 4-pole MCCB footprint for DIN-rail or screw-mount panel integration.","metaTitle":"Siemens 3VA1225-5FF42-0KC0 SENTRON MCCB, 125 A, 4-Pole, 187","metaDescription":"Siemens SENTRON 3VA1225-5FF42-0KC0 molded case circuit breaker, 125 A, 4-pole, breaking capacity 187 kA at 240 V. Active production. 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":"140 mm","Height":"158 mm","Maximum":"125 A","Minimum":"125 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":"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":"3VA12255FF420AA0","Design Of The Auxiliary Switch":"2 auxiliary switches HQ","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","design of the N-conductor protection":"50%","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":"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":"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=568734&mlfb=3VA1225-5FF42-0KC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5FF42-0KC0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA1225-5FF42-0KC0?","answer":"Submit an RFQ against this order code. Availability and current pricing are confirmed at quote time through independent distribution."},{"question":"What are the key ratings of 3VA1225-5FF42-0KC0?","answer":"Rated 125 A continuous, 4-pole, breaking capacity 187 kA at 240 V AC, 121 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V. Rated insulation voltage 800 V. Includes shunt trip and two auxiliary switches."},{"question":"What compliance documentation does Siemens provide for 3VA1225-5FF42-0KC0?","answer":"Siemens provides RoHS, REACH, and IEC/UL certification documentation for the SENTRON 3VA series. Full declarations of conformity are available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-5FF42-0KC0","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/3VA1225-5FF42-0KC0 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}}