{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2125-7HL42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2125-7HL42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2125-7HL42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2125-7HL42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2 series, molded case circuit breaker, 3VA2125-7HL42-0AA0, 4-pole, 25 A, ETU320 electronic trip unit, 330 kA at 240 V.","salesMarkdown":"That flat thermal curve simplifies panel design — one device covers a warm cabinet without recalculating the load schedule. Its 4-pole construction handles three-phase plus neutral, with the N-conductor protection adjustable to OFF or 100 % of the phase rating. The ETU320 electronic trip unit provides selectable overload and short-circuit curves, giving the integrator precision over coordination with downstream breakers. Breaking capacity is the headline: 330 kA at 240 V AC, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V. ## Panel fit and physical integration If your BOM requires shunt trip or remote status, plan for an accessory add-on or step up to a 3VA2 variant with those features built in.","metaTitle":"Siemens 3VA2125-7HL42-0AA0 SENTRON MCCB, 25 A, 4-Pole, 330 k","metaDescription":"Siemens 3VA2125-7HL42-0AA0 SENTRON molded case circuit breaker, 25 A continuous, 4-pole, ETU320 electronic trip, 330 kA breaking at 240 V. Current lifecycle stage. Available to ord","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":"330 kA","at 415 V":"242 kA","at 440 V":"242 kA","at 500 V":"187 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","Courant permanent assigné Iu":"25 A","Ground-Fault Monitoring Version":"Without","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU320","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 100%","operating voltage / at AC / rated value":"690 V","reference code / according to IEC 81346-2":"Q","Continuous Current / Rated Value / Maximum":"160 A","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":"C","Mechanical Service Life (Operating 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=174480&mlfb=3VA2125-7HL42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2125-7HL42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA2125-7HL42-0AA0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm position."},{"question":"What are the key ratings of 3VA2125-7HL42-0AA0?","answer":"It is a 4-pole MCCB rated 25 A continuous with no derating from 40 °C to 70 °C. Breaking capacity reaches 330 kA at 240 V AC, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V. The electronic trip unit is an ETU320."},{"question":"Will 3VA2125-7HL42-0AA0 drop into a panel specified around 3VA2025-8HN42-0AA0?","answer":"Both are 3VA2-series 4-pole MCCBs with the same 140 mm width, 181 mm height, and 86 mm depth — the mounting footprint and bus-bar centers are identical. The difference is the trip unit: the 3VA2125-7HL42-0AA0 carries an ETU320 electronic trip, while the 3VA2025-8HN42-0AA0 uses a different release design. Wiring connections land in the same positions, so no re-drilling or re-bussing is needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2125-7HL42-0AA0","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/3VA2125-7HL42-0AA0 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}}