{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2125-5HN42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2125-5HN42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2125-5HN42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2125-5HN42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2125-5HN42-0AA0, molded case circuit breaker, 4-pole, 25 A rated current, ETU350 electronic release, interrupting rating 187 kA at 240 V, IP40 front protection.","salesMarkdown":"The Siemens SENTRON 3VA2125-5HN42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated at 25 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed for warm panel environments. The interrupting rating of 187 kA at 240 V and 121 kA at 415 V covers most industrial service-entrance and feeder applications; at 690 V it drops to 3.7 kA, so it's not suited for high-voltage motor circuits at that level. ## Panel integration","metaTitle":"Siemens 3VA2125-5HN42-0AA0 SENTRON MCCB, 25 A, 187 kA at 240","metaDescription":"Siemens SENTRON 3VA2125-5HN42-0AA0 molded case circuit breaker, 4-pole, 25 A rated, ETU350 release, interrupting rating 187 kA at 240 V. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"86 mm","Width":"140 mm","Height":"181 mm","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"121 kA","at 500 V":"75.6 kA","at 690 V":"3.7 kA","at 40 °C":"25 A","at 45 °C":"25 A","at 50 °C":"25 A","at 55 °C":"25 A","at 60 °C":"25 A","at 65 °C":"25 A","at 70 °C":"25 A","Depth [In]":"3.39 in","Width [In]":"5.51 in","Height [In]":"7.13 in","Trip Indicator":"No","Number Of Poles":"4","Product version":"Line protection","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"0.6 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","rated insulation voltage Ui":"800 V","Courant permanent assigné Iu":"25 A","Ground-Fault Monitoring Version":"Without","Design Of The Overcurrent Release":"ETU350","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 100%","reference code / acc. to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Adjustable response value current / li max.":"300 A","Adjustable response value current / li min.":"300 A","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"LSI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"M","Max. rated operational current of the frame size":"160 A","Mechanical Service Life (Switching Cycles) / Typical":"25 000","Type Of Electrical Connection / For Main Current Circuit":"on both sides nut keeper kit","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal","Type of connectable conductor cross-section, connection screw, width x thickness , max.":"25 x 8 mm","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"13 x 1 mm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/641a6843e8dc2f758bb6426196efa871.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=247035&mlfb=3VA2125-5HN42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2125-5HN42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA2125-5HN42-0AA0?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the interrupting rating at 415 V?","answer":"121 kA at 415 V, which covers most industrial feeder applications at that voltage level."},{"question":"Does 3VA2125-5HN42-0AA0 drop into a panel designed for 5SQ2670-2YA06?","answer":"No — the 5SQ2670-2YA06 is a withdrawable MCCB with a different mounting footprint. The 3VA2125-5HN42-0AA0 is a fixed-mount breaker; panel rewiring and mounting changes would be required."},{"question":"What compliance documentation is available for this part?","answer":"As a Siemens SENTRON product, it carries CE, UL, and CSA certifications, and complies with RoHS and REACH. Specific declaration documents are available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2125-5HN42-0AA0","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/3VA2125-5HN42-0AA0 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}}