{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2440-5HM42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2440-5HM42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2440-5HM42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2440-5HM42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2440-5HM42-0AA0, molded case circuit breaker, 4-pole, 400 A rated continuous current, 187 kA interrupting at 240 V, line protection design.","salesMarkdown":"Interrupting capacity hits 187 kA at 240 V, 121 kA at 415 V, and still 9 kA at 690 V, so it handles high-fault utility feeds or transformer secondaries without cascading upstream. The ground-fault monitoring uses summation current formation on L+N, so it's wired for residual sensing on the neutral path. Dimensions: 248 mm high, 184 mm wide, 110 mm deep. Four-pole frame means it occupies the full width of a standard 600 mm wide panel's backplate if you leave side wiring gutters. No DIN-rail mount — this is a bolted-frame MCCB; plan for busbar or cable lugs on the line and load side. Maximum power loss is 63.5 W, so account for that in the thermal budget if you're stacking breakers in a sealed enclosure. ## What the interrupting ratings mean for coordination At 415 V it's 121 kA, at 500 V it's 75.6 kA, at 690 V it drops to 9 kA. If your transformer secondary or generator bus can deliver more than 9 kA at 690 V, this breaker is not the right choice for that voltage level.","metaTitle":"Siemens 3VA2440-5HM42-0AA0 SENTRON MCCB, 400 A, 4-Pole, 187","metaDescription":"Siemens 3VA2440-5HM42-0AA0 SENTRON molded case circuit breaker, 400 A continuous, 4-pole, 187 kA at 240 V. Current lifecycle. 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":"184 mm","Height":"248 mm","Maximum":"4 800 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":"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":"Summation current formation L + N conductor","Continuous Current / Rated Value":"400 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU330","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 50%; 100%","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":"LIG","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=346960&mlfb=3VA2440-5HM42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2440-5HM42-0AA0/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2440-5HM42-0AA0","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/3VA2440-5HM42-0AA0 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}}