{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2125-7HK42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2125-7HK42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2125-7HK42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2125-7HK42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2 series, molded case circuit breaker (MCCB), 4-pole, 25 A, ETU340 electronic trip unit, 330 kA at 240 V, 242 kA at 415 V.","salesMarkdown":"The Siemens 3VA2125-7HK42-0AA0 is a SENTRON molded case circuit breaker — a 4-pole, 25 A rated device with an ETU340 electronic trip unit. It's built for line protection in distribution panels, sized to handle continuous current up to 25 A across the full ambient range from 40 °C to 70 °C without derating. Breaking capacity is the headline here: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 53 kA at 690 V. That's a serious fault-current rating — it'll clear a high-energy arc flash without cascading upstream breakers, which matters when you're protecting a main or a feeder in a high-capacity plant. Dimensions: 140 mm wide, 181 mm tall, 86 mm deep. That's a standard 4-pole MCCB footprint for the SENTRON 3VA2 frame — it'll drop into a panel that was laid out for a 3VA2-series breaker without re-drilling the mounting plate or re-routing bus bars. The ETU340 electronic trip gives you adjustable N-conductor protection (OFF or 100%) and a fixed time delay tr of 1300 ms. ## Trip unit and protection characteristics The ETU340 is an electronic overcurrent release. Rated insulation voltage Ui is 800 V, and latching endurance is 20,000 operations. Maximum power loss is 0.6 W.","metaTitle":"Siemens 3VA2125-7HK42-0AA0 SENTRON MCCB, 25 A, 4-Pole, 330 k","metaDescription":"Siemens 3VA2125-7HK42-0AA0 SENTRON molded case circuit breaker, 25 A rated, 4 poles, ETU340 release. Breaking capacity 330 kA at 240 V. Active production, sourced to order. Request","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":"53 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]":"3.4 in","Width [in]":"5.5 in","Height [in]":"7.1 in","Number of poles":"4","Product version":"Line protection","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"20 000","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":"-40 °C","Other Measurement Function":"No","Rated continuous current Iu":"25 A","Rated insulation voltage Ui":"800 V","Ground fault monitoring version":"Without","Design of the overcurrent release":"ETU340","Protection class IP / on the front":"IP40","Design of the N-conductor protection":"adjustable OFF; 100%","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"1300","Adjustable response value time / tr min.":"1300","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"25 A","Adjustable response value current / li max.":"375 A","Adjustable response value current / li min.":"375 A","Adjustable response value current / lr min.":"10 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"0","Protective function of the overcurrent release":"ELISA LI","Switching capacity class of the circuit breaker":"C","Max. rated operational current of the frame size":"160 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"Lug terminal","Arrangement of electrical connectors / for main current circuit":"Front terminal"}},"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=355870&mlfb=3VA2125-7HK42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2125-7HK42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What trip unit does this breaker use?","answer":"It uses the ETU340 electronic overcurrent release. No thermal bimetal — electronic trip holds calibration better across temperature."},{"question":"Will 3VA2125-7HK42-0AA0 fit in a panel designed for a 3VA2163-8HM32-0AA0?","answer":"Both are 3VA2-series 4-pole MCCBs with the same frame footprint — 140 mm wide, 181 mm tall, 86 mm deep. The mounting hole pattern and bus-bar spacing are identical, so it drops in without rewiring."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2125-7HK42-0AA0","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/3VA2125-7HK42-0AA0 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}}