{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-4GF42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-4GF42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-4GF42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4GF42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1125-4GF42-0AA0, molded case circuit breaker, 4-pole, 25 A, TM240 overcurrent release, 121 kA at 240 V AC.","salesMarkdown":"At 240 V it's rated 121 kA, which covers most North American secondary-side faults. At 415 V it handles 75.6 kA, and at 440 V it's 52.5 kA — both figures that suit European and Asian industrial supply points. Above that, at 500 V and 690 V, the rating drops to 11.9 kA, so you'll need to verify the available fault current at the installation point if you're feeding a 690 V motor control center. That's a shallow derating curve — useful if the panel runs warm or sits near other heat sources. Front face protection is IP40, so it's fine for indoor panel mounting but not for washdown areas.","metaTitle":"Siemens 3VA1125-4GF42-0AA0 SENTRON MCCB, 25 A, 4-Pole, 121 k","metaDescription":"Siemens 3VA1125-4GF42-0AA0 SENTRON molded case circuit breaker, 25 A rated, 4-pole, 121 kA interrupting at 240 V. TM240 release. Current lifecycle. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"101.6 mm","Height":"130 mm","Maximum":"25 A","Minimum":"25 A","at 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 kA","at 500 V":"11.9 kA","at 690 V":"11.9 kA","at 40 °C":"25 A","at 45 °C":"25 A","at 50 °C":"25 A","at 55 °C":"24 A","at 60 °C":"24 A","at 65 °C":"23 A","at 70 °C":"23 A","Depth [In]":"2.76 in","Width [In]":"4 in","Height [In]":"5.12 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":"8.5 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","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":"100%","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":"0","Switching Capacity Class Of The Circuit Breaker":"S","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=225124&mlfb=3VA1125-4GF42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4GF42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 3VA1125-4GF42-0AA0 and how is it quoted?","answer":"This part is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — no stock or price figures are published here."},{"question":"What is the interrupting capacity of this MCCB at 240 V?","answer":"At 240 V AC the 3VA1125-4GF42-0AA0 is rated for 121 kA interrupting capacity."},{"question":"What overcurrent release does the 3VA1125-4GF42-0AA0 use?","answer":"It uses a TM240 thermal-magnetic overcurrent release — a fixed, non-interchangeable trip unit sized for 25 A continuous."},{"question":"Does this breaker fit a standard panel depth?","answer":"Yes, the depth is 70 mm, which fits most standard-depth enclosures without requiring a deeper gland plate."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-4GF42-0AA0","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/3VA1125-4GF42-0AA0 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}}