{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1340-4FF42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1340-4FF42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1340-4FF42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1340-4FF42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1340-4FF42-0AA0, 4-pole molded case circuit breaker, 400 A (at 40°C), TM240 thermal-magnetic release, 121 kA breaking capacity at 240 V.","salesMarkdown":"## SENTRON 3VA1340-4FF42-0AA0 — 400 A 4-Pole MCCB, TM240 Release The Siemens 3VA1340-4FF42-0AA0 is a SENTRON-series molded case circuit breaker (MCCB) rated for 400 A continuous current at 40 °C, with a 4-pole configuration and a TM240 thermal-magnetic overcurrent release. It carries a maximum breaking capacity of 121 kA at 240 V, derating to 75.6 kA at 415/440 V, 52.5 kA at 500 V, and 11.9 kA at 690 V — so the interrupting rating you need depends entirely on your system voltage and available fault current. This is a line-protection version (not a motor-protection or ground-fault variant), so it's intended for feeder and main breaker duty in distribution panels. The 4-pole design handles three-phase plus neutral, with the N-conductor protection set at 50% of the phase rating — typical for a fully rated system where the neutral needs its own overcurrent element. Physical footprint: 248 mm high, 184 mm wide, 110 mm deep. That's a standard 4-pole MCCB form factor — it will drop into most SENTRON 3VA switchboard chassis or panel-mount cutouts designed for the 400 A frame. Power dissipation is 92.1 W maximum at rated current — that's heat that has to be managed inside the enclosure.","metaTitle":"Siemens 3VA1340-4FF42-0AA0 SENTRON 4-Pole MCCB, 400 A, TM240","metaDescription":"Siemens 3VA1340-4FF42-0AA0 SENTRON molded case circuit breaker, 4-pole, 400 A at 40°C, TM240 thermal-magnetic release, 121 kA at 240 V. Active production. Quoted to order.","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","title":"3VA1340-4FF42-0AA0","Height":"248 mm","at 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"75.6 kA","at 500 V":"52.5 kA","at 690 V":"11.9 kA","at 40 °C":"400 A","at 45 °C":"400 A","at 50 °C":"400 A","at 55 °C":"392 A","at 60 °C":"384 A","at 65 °C":"376 A","at 70 °C":"367 A","Depth [In]":"4.33 in","Width [In]":"7.24 in","Height [In]":"9.76 in","description":"circuit breaker 3VA1 IEC frame 400 breaking capacity class N Icu=36kA @ 415V 4-pole, line protection TM240, ATAM, In=400A overload protection Ir=280A...400A short-circuit protection Ii=5...10 x In N conductor protection 50% nut keeper kit","Number Of Poles":"4","Product version":"Line protection","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"92.1 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","rated insulation voltage Ui":"800 V","Courant permanent assigné Iu":"400 A","Ground-Fault Monitoring Version":"Without","Design Of The Overcurrent Release":"TM240","Design Of Short-Circuit Protection":"For switching power values in DC networks, see the 3VA molded case circuit breaker device manual; link to be found under Service & Support in the last chapter","protection class IP / on the front":"IP40","design of the N-conductor protection":"50%","reference code / acc. to IEC 81346-2":"Q","Max. rated operational voltage Ue with DC":"600 V","Product Extension / Optional / Motor Drive":"Yes","Adjustable response value current / li max.":"4 000 A","Adjustable response value current / li min.":"2 000 A","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"S","Max. rated operational current of the frame size":"400 A","Mechanical Service Life (Switching Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"nut keeper kit on both ends","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f59d8c360c846d5ff9ef773daebb7908.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=569001&mlfb=3VA1340-4FF42-0AA0"},"ai":{"faq":[{"question":"Where can I buy the 3VA1340-4FF42-0AA0 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability — lead time and stock are confirmed at quote time."},{"question":"What is the breaking capacity at 415 V?","answer":"At 415 V the breaking capacity is 75.6 kA, which is the same rating as at 440 V — so it handles typical 400 V-class distribution faults without derating across that band."},{"question":"What does the TM240 release mean?","answer":"TM240 designates a thermal-magnetic release with a 400 A continuous rating (the '240' is an internal Siemens code for the release family, not the amp rating). The thermal element provides overload protection; the magnetic element handles short-circuit interruption with an adjustable pickup."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1340-4FF42-0AA0","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/3VA1340-4FF42-0AA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}