{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1440-5MH32-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1440-5MH32-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1440-5MH32-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1440-5MH32-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1440-5MH32-0AA0, 3-pole molded case circuit breaker, 400 A, TM120M thermal-magnetic release, interrupting capacity 187 kA at 240 V AC.","salesMarkdown":"## What this 400 A MCCB delivers in a panel The interrupting capacity hits 187 kA at 240 V AC, 121 kA at 415 V, and still holds 75.6 kA at 500 V — which means it can clear a high-fault bolted short on a 480 V distribution bus without upstream coordination headaches. ## Thermal derating — where the 400 A holds and where it drops At 55 °C it derates to 392 A, at 60 °C to 384 A, at 65 °C to 376 A, and at 70 °C to 367 A. The TM120M release is fixed-trip; no field-adjustable thermal dial, so the derated current is the hard limit. Dimensions: 248 mm height, 138 mm width, 110 mm depth. The starter-protection design means it's tailored for motor branch circuits, with the TM120M release curve coordinated for starting inrush.","metaTitle":"Siemens 3VA1440-5MH32-0AA0 SENTRON MCCB, 400 A, 3-Pole","metaDescription":"Siemens 3VA1440-5MH32-0AA0 SENTRON molded case circuit breaker, 400 A, 3-pole, TM120M release, 187 kA at 240 V. Active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"110 mm","Width":"138 mm","title":"3VA1440-5MH32-0AA0","Height":"248 mm","Maximum":"400 A","Minimum":"400 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":"11.9 kA","at 40 °C":"400 A","at 45 °C":"400 A","at 50 °C":"400 A","at 55 °C":"392 A","at 60 °C":"384 A","at 65 °C":"376 A","at 70 °C":"367 A","Depth [In]":"4.33 in","Width [In]":"5.43 in","Height [In]":"9.76 in","description":"circuit breaker 3VA1 IEC frame 630 breaking capacity class M Icu=55kA @ 415V 3-pole, starter protection TM120M, AM, In=400A without overload protection short-circuit protection Ii=8...16 x In nut keeper kit","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":"No","Design Of The Product":"Starter protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"76.8 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Ground-Fault Monitoring Version":"Without","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"TM120M","Design Of Short-Circuit Protection":"For switching power values in DC networks, see the 3VA molded case circuit breaker device manual; link to be found under Service & Support in the last chapter","protection class IP / on the front":"IP40","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"I","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":"nut keeper kit on both ends","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/af2076c3a6c643c284da6fd77ad1c810.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=569011&mlfb=3VA1440-5MH32-0AA0"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1440-5MH32-0AA0","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/3VA1440-5MH32-0AA0 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}}