{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VM1440-5MH32-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VM1440-5MH32-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VM1440-5MH32-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VM1440-5MH32-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VM1440-5MH32-0AA0, molded case circuit breaker, 3-pole, TM120M thermal-magnetic release, 400 A rated at 40 °C, 6400 A maximum breaking capacity, 187 kA at 240 V.","salesMarkdown":"At 240 V it interrupts 187 kA; at 415 V and 440 V it's rated 121 kA; at 500 V it drops to 76 kA. That SCCR range covers most industrial distribution panels fed from a medium-voltage transformer. It's a straight electromechanical breaker for main or feeder protection where you don't need adjustable trip curves or remote monitoring. The 400 A rating holds up to 50 °C. Above that, it derates: 392 A at 55 °C, 384 A at 60 °C, 376 A at 65 °C, and 367 A at 70 °C. The breaker dissipates 77 W max, so panel cooling matters in a sealed box. That 138 mm width is wider than a standard 3-pole IEC MCB (typically 54 mm) — plan your DIN-rail or mounting-plate layout accordingly. Front protection is IP40, so it's fine for a closed panel; no washdown rating on the front face.","metaTitle":"Siemens 3VM1440-5MH32-0AA0 SENTRON MCCB, 400 A, 6400 A max","metaDescription":"Siemens 3VM1440-5MH32-0AA0 SENTRON molded case circuit breaker, 3-pole, 400 A at 40 °C, TM120M release, 187 kA at 240 V. Current production, quoted 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":"138 mm","Height":"248 mm","Maximum":"6 400 A","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"121 kA","at 500 V":"76 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","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":"Startetptotection","Communication Function":"No","Phase Failure Detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"77 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 capacity values in DC power systems, see the 3VA Molded Case Circuit Breaker Manual; link available 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","operating voltage / at DC / rated value":"500 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":"15 000","Type Of Electrical Connection / For Main Current Circuit":"nut keeper kit on both ends","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front connection"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=569125&mlfb=3VM1440-5MH32-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VM1440-5MH32-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is 3VM1440-5MH32-0AA0's listed depth and width?","answer":"Depth is 110 mm, width is 138 mm, height is 248 mm. The 138 mm width is a key panel-fit dimension — it's wider than a standard 3-pole IEC MCB."},{"question":"Where can I buy 3VM1440-5MH32-0AA0 and how is it quoted?","answer":"This part is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VM1440-5MH32-0AA0","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/3VM1440-5MH32-0AA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}