{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2440-7HM42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2440-7HM42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2440-7HM42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2440-7HM42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2440-7HM42-0AA0, molded case circuit breaker, 4-pole, 400 A, ETU330 electronic trip unit, line protection version, 110 mm depth, 184 mm width, 248 mm height.","salesMarkdown":"## 400 A continuous, 330 kA interrupting — selectivity headroom for the main feeder The Siemens 3VA2440-7HM42-0AA0 is a SENTRON molded case circuit breaker rated for 400 A continuous at 70 °C ambient — no derating needed across the full -25 °C to 70 °C operating range. The interrupting capacity hits 330 kA at 240 V, 242 kA at 415/440 V, and still holds 187 kA at 500 V, dropping to 9 kA at 690 V. That puts it squarely on the main feeder or high-fault busway position where upstream coordination demands a stiff SCCR. Ground-fault monitoring uses summation current formation on L + N, with N-conductor protection adjustable OFF, 50%, or 100%. ## Current lifecycle — active production, standard sourcing channel Lifecycle status is current — Siemens still produces this order code. No last-time-buy or phase-out notice applies. ## Panel fit — 4-pole, 110 mm depth, IP40 front Four-pole construction, 110 mm deep, 184 mm wide, 248 mm tall. The 110 mm depth is the dimension that matters for enclosure depth — most 400 A frame MCCBs run 100–120 mm, so this fits standard 300 mm deep panels with gland plate clearance. IP40 on the front face means protected against tools and solid objects over 1 mm; the rest of the breaker is open-frame inside the enclosure.","metaTitle":"Siemens 3VA2440-7HM42-0AA0 SENTRON MCCB, 400 A, 330 kA at 24","metaDescription":"Siemens SENTRON 3VA2440-7HM42-0AA0 molded case circuit breaker, 400 A continuous, 330 kA interrupting at 240 V. ETU330 trip unit, line protection. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"110 mm","Width":"184 mm","Height":"248 mm","at 240 V":"330 kA","at 415 V":"242 kA","at 440 V":"242 kA","at 500 V":"187 kA","at 690 V":"9 kA","at 40 °C":"400 A","at 45 °C":"400 A","at 50 °C":"400 A","at 55 °C":"400 A","at 60 °C":"400 A","at 65 °C":"400 A","at 70 °C":"400 A","Depth [In]":"4.33 in","Width [In]":"7.24 in","Height [In]":"9.76 in","Limited To 1 S":"5 kA","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":"63.5 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Courant permanent assigné Iu":"400 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; 50%; 100%","reference code / acc. to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Adjustable response value current / lg max.":"400 A","Adjustable response value current / lg min.":"80 A","Adjustable response value current / li max.":"4 800 A","Adjustable response value current / li min.":"600 A","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":"C","Max. rated operational current of the frame size":"630 A","Mechanical Service Life (Operating 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.":"35 x 10 mm","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"20 x 1 mm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0eb36652ce522f093395d6bd0dd27e34.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=246965&mlfb=3VA2440-7HM42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2440-7HM42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What trip unit does the 3VA2440-7HM42-0AA0 use?","answer":"It uses the ETU330 electronic trip unit with adjustable long-time, short-time, instantaneous, and ground-fault protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2440-7HM42-0AA0","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/3VA2440-7HM42-0AA0 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}}