{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2440-5MN32-0CA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2440-5MN32-0CA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2440-5MN32-0CA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2440-5MN32-0CA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2440-5MN32-0CA0, molded case circuit breaker, 3-pole, 400 A rated current, motor protection design, 121 kA breaking capacity at 415 V, undervoltage release.","salesMarkdown":"## MCCB for motor branch circuits — 400 A, 3-pole, with undervoltage release The Siemens SENTRON 3VA2440-5MN32-0CA0 is a 3-pole molded case circuit breaker (MCCB) rated 400 A continuously across the full 40 °C to 70 °C ambient range — no derating needed up to that ceiling. Breaking capacity sits at 121 kA at 415 V and 187 kA at 240 V, giving solid fault-clearing headroom on a 400 V distribution bus. The design is explicitly for motor protection and includes integrated phase failure detection, so it handles the inrush and overload profile of a motor branch circuit without nuisance trips. An undervoltage release (UVR) is built in, which means the breaker drops the load automatically if supply voltage falls below the release threshold — a standard requirement for safety interlocks on conveyors, pumps, and compressors. That means this breaker can be packed into a warm enclosure or mounted near heat-producing drives without losing ampacity. At 690 V the breaking capacity drops to 9 kA, so on a 690 V system the breaker is limited to low-fault branches. The limited-to-1-second rating of 5 kA governs short-time withstand for selective coordination — downstream breakers must clear faster than 1 s or the 3VA2440 trips. The 66 W maximum power loss needs to be factored into enclosure thermal calculations; at full load the breaker dissipates roughly the heat of a small soldering iron. The undervoltage release is factory-installed; no auxiliary switch is present, so if you need remote status indication, order the auxiliary switch variant or add one externally.","metaTitle":"Siemens 3VA2440-5MN32-0CA0 SENTRON MCCB, 400 A, 3-Pole, Moto","metaDescription":"Siemens SENTRON 3VA2440-5MN32-0CA0 molded case circuit breaker, 400 A rated at 40 °C, 121 kA breaking at 415 V, 3-pole motor protection with undervoltage release. Active production","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"110 mm","Width":"138 mm","Height":"248 mm","Maximum":"17 s","Minimum":"4 s","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"121 kA","at 500 V":"75.6 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]":"5.43 in","Height [In]":"9.76 in","Limited To 1 S":"5 kA","Trip Indicator":"No","Number Of Poles":"3","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"Yes","Design Of The Product":"Motor protection","Communication Function":"No","Phase Failure Detection":"Yes","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"66 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA2440-5MN32-0AA0","Design Of The Auxiliary Switch":"Without","Design Of The Auxiliary Release":"undervoltage release (UVR)","Ground-Fault Monitoring Version":"Without","Continuous Current / Rated Value":"400 A","Insulation Voltage / Rated Value":"800 V","adjustable trip class (Tc CLASS)":"10A, 10E, 20E","Design Of The Overcurrent Release":"ETU350M","protection class IP / on the front":"IP40","operating power / at AC-3 / at 230 V":"90 000 W","operating power / at AC-3 / at 400 V":"160 000 W","Of The Integrated Auxiliary Trip Unit":"3VA9608-0BB24","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":"630 A","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LSI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"M","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"}},"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=569897&mlfb=3VA2440-5MN32-0CA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2440-5MN32-0CA0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA2440-5MN32-0CA0?","answer":"Submit an RFQ through this listing. The part is sourced to order via independent distribution; pricing and stock are confirmed at quote time."},{"question":"What is the breaking capacity of 3VA2440-5MN32-0CA0 at 415 V?","answer":"The breaking capacity is 121 kA at 415 V. At 240 V it is 187 kA, and at 690 V it drops to 9 kA."},{"question":"Does 3VA2440-5MN32-0CA0 include an undervoltage release?","answer":"Yes, it includes a factory-installed undervoltage release (UVR). No auxiliary switch is provided."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2440-5MN32-0CA0","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/3VA2440-5MN32-0CA0 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}}