{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2440-5MN32-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2440-5MN32-0AB0","canonicalUrl":"https://aoctrl.com/siemens/3VA2440-5MN32-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2440-5MN32-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2440-5MN32-0AB0, molded case circuit breaker, 3-pole, 400 A, motor protection version, 187 kA at 240 V.","salesMarkdown":"It is a 3-pole device with a supplied basic switch order code of 3VA2440-5MN32-0AA0, meaning this is the assembled, ready-to-install unit with the internal switching mechanism pre-integrated. The breaking capacity tells you where this breaker can safely interrupt a fault: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 9 kA at 690 V. This is the motor protection version, so it includes phase failure detection built in — no separate phase-monitoring relay needed for that function. The auxiliary release slot is empty, so if you need an undervoltage or shunt trip, that gets added separately. The 138 mm width is the 3-pole footprint; if you are replacing an existing MCCB in a SENTRON or similar platform, check the mounting hole pattern against the existing base plate. ## Power dissipation and thermal management Maximum power loss is 63.5 W at rated current. For a 400 A breaker in a closed panel, that heat needs to be considered in the enclosure thermal calculation — it is not a trivial loss, and adjacent devices should not be packed tight without derating or forced ventilation.","metaTitle":"Siemens 3VA2440-5MN32-0AB0 SENTRON MCCB, 400 A, 3-Pole, Moto","metaDescription":"Siemens 3VA2440-5MN32-0AB0 SENTRON molded case circuit breaker, 400 A rated, 3-pole motor protection. Breaking capacity 187 kA at 240 V. Current production. Quoted 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","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","Product version":"Motor protection","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Communication Function":"No","Phase Failure Detection":"Yes","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"63.5 W","Auxiliary contact version":"2 auxiliary switches HP","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","rated insulation voltage Ui":"800 V","Of The Supplied Basic Switch":"3VA2440-5MN32-0AA0","Courant permanent assigné Iu":"400 A","Design Of The Auxiliary Release":"Without auxiliary release","Ground-Fault Monitoring Version":"Without","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","reference code / acc. to IEC 81346-2":"Q","Undervoltage Release With Leading Contact":"No","Product Extension / Optional / Motor Drive":"Yes","Adjustable response value current / li max.":"6 000 A","Adjustable response value current / li min.":"6 000 A","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"LSI","number of CO contacts / for auxiliary contacts":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA11","Switching Capacity Class Of The Circuit Breaker":"M","Max. rated operational current of the frame size":"630 A","Mechanical Service Life (Switching 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","Type of connectable conductor cross-section, connection screw, width x thickness , max.":"35 x 10 mm","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"20 x 1 mm"}},"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=569885&mlfb=3VA2440-5MN32-0AB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2440-5MN32-0AB0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA2440-5MN32-0AB0 at 415 V?","answer":"121 kA at 415 V, which covers most 400 V industrial distribution panels with significant fault-current headroom."},{"question":"Does this MCCB include phase failure protection?","answer":"Yes, phase failure detection is built into the motor protection version — no separate module required."},{"question":"Where can I buy 3VA2440-5MN32-0AB0 and how is it quoted?","answer":"We source and quote this part to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for your target quantity and delivery window."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2440-5MN32-0AB0","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/3VA2440-5MN32-0AB0 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}}