{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2440-5KQ42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2440-5KQ42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2440-5KQ42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2440-5KQ42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2440-5KQ42-0AA0, molded case circuit breaker, 400 A, 4-pole, 187 kA at 240 V, line protection, with communication.","salesMarkdown":"Its 4-pole configuration handles three-phase plus neutral, common in North American and IEC installations where a switched neutral is required. This breaker's interrupting rating drops as voltage rises: 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. ## Thermal performance and continuous rating Maximum power loss is 63.5 W, so ventilation planning should account for that dissipation at full load. The adjustable thermal-magnetic trip unit has a full-scale value of 400 A and an initial setting of 80 A, with a short-time withstand of 5 kA limited to 1 second. Dimensions are 248 mm high, 184 mm wide, 110 mm deep — a standard SENTRON 3VA frame size for 400 A class. Verify the gland plate knockout pattern against your enclosure; the 110 mm depth (4.33 in) leaves clearance behind the door for wiring and accessory modules. ## Communication and monitoring features It also supports ground-fault monitoring via summation current formation on the L + N conductors, which allows detection of leakage without a separate core-balance transformer. No undervoltage release or voltage-triggered trip is fitted as standard.","metaTitle":"Siemens 3VA2440-5KQ42-0AA0 SENTRON MCCB, 400 A, 4-Pole, 187","metaDescription":"Siemens 3VA2440-5KQ42-0AA0 SENTRON molded case circuit breaker, 400 A continuous, 4-pole, 187 kA interrupting at 240 V. Active production. Sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"110 mm","Width":"184 mm","Height":"248 mm","Maximum":"6 000 A","Minimum":"600 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":"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]":"7.24 in","Height [In]":"9.76 in","Initial Value":"80 A","Limited To 1 S":"5 kA","Trip Indicator":"No","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","Full-Scale Value":"400 A","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Line protection","Communication Function":"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":"Yes","Ground-Fault Monitoring Version":"Summation current formation L + N conductor","Continuous Current / Rated Value":"400 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU860","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 20% to 130%","Product Function / Grounding Protection":"Yes","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":"LSIG","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":"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=138117&mlfb=3VA2440-5KQ42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2440-5KQ42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 3VA2440-5KQ42-0AA0 and get current pricing?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial offer."},{"question":"What are the key ratings for the 3VA2440-5KQ42-0AA0?","answer":"400 A continuous current, 4-pole, interrupting capacity of 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 500 V, and 9 kA at 690 V. Dimensions are 248 x 184 x 110 mm."},{"question":"Will the 3VA2440-5KQ42-0AA0 fit in a panel designed for a 3VA2163-8JQ32-0AA0?","answer":"The 3VA2440-5KQ42-0AA0 is a physically larger frame — 400 A class versus the smaller 3VA2 frame. It will not drop into the same mounting footprint or bus bar spacing without panel rework. Verify the backplate cutout and bus bar centers before specifying."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2440-5KQ42-0AA0","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/3VA2440-5KQ42-0AA0 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}}