{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2025-4HM42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2025-4HM42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2025-4HM42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2025-4HM42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2025-4HM42-0AA0, molded case circuit breaker, line protection, 4-pole, 25 A, ETU330 electronic release, 121 kA at 240 V.","salesMarkdown":"Those are the numbers that matter for a DIN-rail or backplate layout — the 140 mm width is wider than a typical 3-pole frame, so check your gland-plate cutout and phase barrier clearance if you're swapping a narrower unit. Front IP40 means tools and fingers stay out; the enclosure itself handles the rest of the ingress protection. ## Trip unit and protection features The ETU330 electronic release gives you adjustable long-time pickup (Ig) from a minimum of 0.3 s to a maximum of 25 A. Ground-fault monitoring is built in via summation current formation on L + N, and the N-conductor protection can be set to OFF or 100 % of the phase current — useful for a 4-wire system where you need to coordinate the neutral protection with the phase trip. ## Environmental range and power loss That 70 °C operating ceiling matches the full 25 A rating, so no thermal derating curve to chase. Maximum power loss is 0.84 W — negligible for panel heat budgeting, but it tells you the trip unit electronics are efficient.","metaTitle":"Siemens 3VA2025-4HM42-0AA0 SENTRON MCCB, 25 A, 4-Pole, 121 k","metaDescription":"Siemens 3VA2025-4HM42-0AA0 SENTRON molded case circuit breaker, 25 A, 4-pole, ETU330 release, 121 kA at 240 V. Current lifecycle stage. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"86 mm","Width":"140 mm","title":"3VA2025-4HM42-0AA0","Height":"181 mm","at 240 V":"121 kA","at 415 V":"76 kA","at 440 V":"76 kA","at 500 V":"53 kA","at 690 V":"3 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","description":"circuit breaker 3VA2 IEC frame 100 breaking capacity class S Icu=36kA @ 415V 4-pole, line protection ETU330, LIG, In=25A overload protection Ir=10A...25A short-circuit protection Ii=1.5...12 x In N conductor protection adjustable (OFF, 100%) ground-fault protection Ig=0.6...1 x In= tg=0.1/0.3s nut keeper kit","Number Of Poles":"4","Product version":"Line protection","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"0.84 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":"Summation current formation L + N conductor","Tension assignée d'isolement Ui":"800 V","Design Of The Overcurrent Release":"ETU330","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 / lg max.":"25 A","Adjustable response value current / lg min.":"0.3 s","Adjustable response value current / li max.":"300 A","Adjustable response value current / li min.":"38 A","Adjustable response value current / tg min.":"0.1 s","Ground fault protection can be switched ON/OFF":"No","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"LIG","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"S","Max. rated operational current of the frame size":"100 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Mechanical Service Life (Switching Cycles) / Typical":"20 000","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 8.5 mm","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"13 x 1 mm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c7bb0e4de8b076427459bc57836d765d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=493361&mlfb=3VA2025-4HM42-0AA0"},"ai":{"faq":[{"question":"What are the key ratings for this MCCB?","answer":"25 A continuous current (no derating up to 70 °C), 4 poles, ETU330 electronic trip unit, 121 kA interrupting capacity at 240 V, 76 kA at 415/440 V, 53 kA at 500 V, and 3 kA at 690 V. Isolation voltage rating is 800 V."},{"question":"Where can I buy 3VA2025-4HM42-0AA0 and how is it quoted?","answer":"This part is sourced to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2025-4HM42-0AA0","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/3VA2025-4HM42-0AA0 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}}