{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2125-5HK42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2125-5HK42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2125-5HK42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2125-5HK42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2125-5HK42-0AA0, molded case circuit breaker, 4-pole, 25 A rated continuous current, ETU340 electronic trip unit, line protection design.","salesMarkdown":"Rated insulation voltage is 800 V, and the breaking capacity varies sharply with system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. ## Current rating holds across temperature — no derate needed up to 70 °C That is unusual for an MCCB; most require a reduction above 40 °C. This part carries a current-production lifecycle status — it is still in the SENTRON catalog as an active line. No last-time-buy window, no successor part to cross-reference. The 140 mm width on a 4-pole MCCB is standard for the SENTRON 3VA2 frame — it occupies the same footprint as other 4-pole units in the series, so a panel layout designed for a 3VA2 4-pole breaker accepts this one without re-spacing the DIN rail or drilling new gland-plate holes. Suitable for indoor panel mounting where the breaker is behind a closed cabinet door. No IP rating on the sides or rear; clearance to grounded metal per the manufacturer's mounting instructions applies.","metaTitle":"Siemens SENTRON 3VA2125-5HK42-0AA0 MCCB, 25 A, 4-Pole, ETU34","metaDescription":"Siemens SENTRON 3VA2125-5HK42-0AA0 molded case circuit breaker, 25 A continuous, 4-pole, ETU340 release. Breaking capacity 187 kA at 240 V. Current-production status. Quoted 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","title":"3VA2125-5HK42-0AA0","Height":"181 mm","Maximum":"375 A","Minimum":"375 A","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","description":"circuit breaker 3VA2 IEC frame 160 breaking capacity class M Icu=55kA @ 415V 4-pole, line protection ETU340, ELISA LI, In=25A overload protection Ir=10A...25A short-circuit protection Ii=15 x In N conductor protection adjustable (OFF, 100%) nut keeper kit","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":"0.6 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Ground-Fault Monitoring Version":"Without","Continuous Current / Rated Value":"25 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU340","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 100%","Product Function / Grounding Protection":"No","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":"ELISA LI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"M","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"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"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=105538&mlfb=3VA2125-5HK42-0AA0"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2125-5HK42-0AA0","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/3VA2125-5HK42-0AA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}