{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2440-7MS32-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2440-7MS32-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2440-7MS32-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2440-7MS32-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2440-7MS32-0AA0, molded case circuit breaker, 3-pole, 400 A, 330 kA at 240 V, starter protection design.","salesMarkdown":"The Siemens SENTRON 3VA2440-7MS32-0AA0 is a 3-pole molded case circuit breaker rated for 400 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. That flat thermal curve is unusual; most MCCBs start pulling back above 40 °C. Here it means the 400 A nameplate holds in a warm panel or next to a motor starter without recalculating the load. Breaking capacity is 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 9 kA at 690 V. The product is explicitly designed for starter protection — meaning it coordinates with a contactor and overload relay to clear motor faults while letting the overload handle running overloads. That design intent makes it a natural fit for motor control center buckets or individual motor branch circuits where you want the MCCB to act as the backup, not the primary trip. ## Panel fit and physical integration Dimensions: 248 mm height, 138 mm width, 110 mm depth. Maximum power loss is 63.5 W.","metaTitle":"Siemens 3VA2440-7MS32-0AA0 SENTRON MCCB, 400 A, 3-pole","metaDescription":"Siemens SENTRON 3VA2440-7MS32-0AA0 molded case circuit breaker, 400 A continuous, 3-pole, 330 kA at 240 V. Current 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","Height":"248 mm","Maximum":"6 000 A","Minimum":"1 200 A","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]":"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":"No","Design Of The Product":"Starter protection","Communication Function":"No","Phase Failure Detection":"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","Ground-Fault Monitoring Version":"Without","Continuous Current / Rated Value":"400 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU310M","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","Continuous Current / Rated Value / Maximum":"630 A","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":"C","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=569920&mlfb=3VA2440-7MS32-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2440-7MS32-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What are the physical dimensions of this MCCB?","answer":"Height 248 mm, width 138 mm, depth 110 mm. The 110 mm depth is the critical clearance dimension for shallow enclosures."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2440-7MS32-0AA0","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/3VA2440-7MS32-0AA0 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}}