{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-5FF42-0JC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-5FF42-0JC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-5FF42-0JC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5FF42-0JC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-5FF42-0JC0, molded case circuit breaker, 125 A, 4-pole, breaking capacity 187 kA at 240 V AC, 70 mm depth, 140 mm width, 158 mm height.","salesMarkdown":"## SENTRON 3VA1225-5FF42-0JC0 — 125 A MCCB with shunt trip The 125 A frame carries a 187 kA interrupting rating at 240 V, dropping to 121 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V. That's a strong short-circuit curve — useful for panels fed from large transformers or generator paralleling where fault currents run high. Thermal derating is flat 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, 223 A at 70 °C. The 2.76 in × 5.51 in × 6.22 in translates cleanly into existing cutouts if you're swapping an older frame. If the breaker lives in an unheated enclosure in a cold climate, the -25 °C floor is fine for most industrial sites.","metaTitle":"Siemens 3VA1225-5FF42-0JC0 SENTRON MCCB, 125 A, 4-Pole, 187","metaDescription":"Siemens SENTRON 3VA1225-5FF42-0JC0 molded case circuit breaker, 125 A, 4-pole, breaking capacity 187 kA at 240 V. Current lifecycle. Sourced to order. Request 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":"3VA9688-0BL32","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=568731&mlfb=3VA1225-5FF42-0JC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5FF42-0JC0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA1225-5FF42-0JC0 at 415 V?","answer":"121 kA at 415 V AC, per the spec table. That covers most industrial distribution panels fed from a medium-voltage transformer."},{"question":"Does 3VA1225-5FF42-0JC0 include a shunt trip?","answer":"Yes, it ships with a factory-installed shunt trip (STL) release and two auxiliary switches HQ for remote trip and status indication."},{"question":"Where can I buy 3VA1225-5FF42-0JC0 and how is it quoted?","answer":"We source it to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-5FF42-0JC0","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/3VA1225-5FF42-0JC0 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}}