{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2440-5MN32-0AC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2440-5MN32-0AC0","canonicalUrl":"https://aoctrl.com/siemens/3VA2440-5MN32-0AC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2440-5MN32-0AC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2440-5MN32-0AC0, molded case circuit breaker, motor protection design, 3-pole, 400 A at 40-70 °C, breaking capacity 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 500 V, 9 kA at 690 V.","salesMarkdown":"## What it is and what it does The Siemens SENTRON 3VA2440-5MN32-0AC0 is a 3-pole molded case circuit breaker (MCCB) designed specifically for motor protection — that means it's built to handle the high inrush and overload profile of a motor circuit, not just a distribution feeder. It carries a continuous 400 A from 40 °C all the way up to 70 °C without derating, which is unusual and tells you the thermal design has headroom for a warm panel or a tight enclosure. Breaking capacity is the number that decides whether this breaker holds or vents on a hard fault. At 240 V it's rated 187 kA, at 415/440 V it's 121 kA, at 500 V it's 75.6 kA, and at 690 V it drops to 9 kA. That 121 kA at 415 V is a serious number — it means this breaker can sit downstream of a large transformer or a high-fault bus without needing a current-limiting upstream device in most industrial installations. Phase failure detection is built in, which is a standard expectation on a motor-protection breaker but worth confirming — some general-purpose MCCBs skip it and rely on the overload relay. Here the breaker itself watches for a lost phase and trips, which saves a motor from single-phasing. ## Panel fit and integration Dimensions are 248 mm high, 138 mm wide, 110 mm deep. That's a standard SENTRON 3VA frame size for a 400 A 3-pole — it bolts into a panel on a mounting plate, not a DIN rail. The 110 mm depth is shallow enough that it clears most 200 mm deep enclosures with room for rear-connected busbars or a back panel. It ships with 2 auxiliary switches HQ and the supplied basic switch is 3VA2440-5MN32-0AA0. No undervoltage release, no voltage trigger, no communication module — it's a standalone motor-protection breaker with aux contacts for status feedback to a PLC or annunciator. Maximum power loss is 63.5 W. That's the heat it dumps into the enclosure at full rated current — factor that into your thermal calculation if the panel is sealed or has limited ventilation.","metaTitle":"Siemens 3VA2440-5MN32-0AC0 SENTRON MCCB, 400 A, 3-Pole, Moto","metaDescription":"Siemens SENTRON 3VA2440-5MN32-0AC0 molded case circuit breaker, 400 A at 40-70°C, 3-pole, motor protection design, 187 kA at 240 V. Current production. Sourced to order.","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":"No","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":"63.5 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":"2 auxiliary switches HQ","Design Of The Auxiliary Release":"Without auxiliary release","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","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":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","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=569886&mlfb=3VA2440-5MN32-0AC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2440-5MN32-0AC0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA2440-5MN32-0AC0 at 415 V?","answer":"At 415 V the breaking capacity is 121 kA. At 240 V it is 187 kA, at 500 V it is 75.6 kA, and at 690 V it is 9 kA."},{"question":"Where can I buy 3VA2440-5MN32-0AC0 and get current pricing?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm number."},{"question":"Does 3VA2440-5MN32-0AC0 have phase failure protection?","answer":"Yes, phase failure detection is built in. The breaker will trip if a phase is lost, protecting the motor from single-phasing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2440-5MN32-0AC0","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/3VA2440-5MN32-0AC0 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}}