{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1340-5EF42-0BB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1340-5EF42-0BB0","canonicalUrl":"https://aoctrl.com/siemens/3VA1340-5EF42-0BB0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1340-5EF42-0BB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1340-5EF42-0BB0, molded case circuit breaker, 4-pole, 400 A, line protection, 187 kA at 240 V, undervoltage release included.","salesMarkdown":"Its interrupting capacity hits 187 kA at 240 V, dropping to 121 kA at 415 V and 440 V, then 75.6 kA at 500 V, and 11.9 kA at 690 V — so it handles serious fault currents on the low-voltage side but you need to check coordination at higher voltages. The breaker holds its full 400 A rating from 40 °C up to 50 °C, then derates linearly: 392 A at 55 °C, 384 A at 60 °C, 376 A at 65 °C, and 367 A at 70 °C. That matters if this sits in a hot panel next to drives or transformers — you lose about 2% per 5 °C above 50 °C. Maximum power loss is 94.6 W, so plan for heat dissipation in the enclosure. Dimensions are 184 mm wide, 248 mm tall, and 110 mm deep — a standard 4-pole MCCB footprint for Siemens SENTRON 3VA frames. It mounts into a panel via the rear mounting plate; no DIN rail here, so factor in drilling and bus-bar connections. The undervoltage release (UVR) is pre-installed, which means one less wiring step during commissioning — just connect the control voltage.","metaTitle":"Siemens 3VA1340-5EF42-0BB0 SENTRON MCCB, 400 A, 4-Pole, 187","metaDescription":"Siemens SENTRON 3VA1340-5EF42-0BB0 molded case circuit breaker, 400 A, 4 poles, 187 kA at 240 V. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"110 mm","Width":"184 mm","title":"3VA1340-5EF42-0BB0","Height":"248 mm","Maximum":"0 A","Minimum":"0 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":"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 M Icu=55kA @ 415V 4-pole, line protection TM240, ATAM, In=400A overload protection Ir=280A...400A short-circuit protection Ii=5...10 x In N conductor unprotected nut keeper kit circuit breaker 3VA1 IEC frame 400 breaking capacity class M Icu=55kA @ 415V 4-pole, line protection TM240, ATAM, In=400A overload protection Ir=280A...400A short-circuit UNDERVOLTAGE RELEASE 24 V DC ACCESSORY FOR 3VA1 and 3VA20 up 2 AUXILIARY SWITCH CHANGEOVER H","Trip Indicator":"No","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"Yes","Design Of The Product":"Line protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"94.6 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA13405EF420AA0","Design Of The Auxiliary Switch":"2 auxiliary switches HP","Design Of The Auxiliary Release":"undervoltage release (UVR)","Ground-Fault Monitoring Version":"Without","Insulation Voltage / Rated Value":"800 V","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":"without","Of The Integrated Auxiliary Trip Unit":"3VA9608-0BB11","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"600 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LI","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","Mechanical Service Life (Operating 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"}},"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=1399589&mlfb=3VA1340-5EF42-0BB0"},"ai":{"faq":[{"question":"What is the interrupting capacity of 3VA1340-5EF42-0BB0 at different voltages?","answer":"At 240 V it's 187 kA, at 415 V and 440 V it's 121 kA, at 500 V it's 75.6 kA, and at 690 V it's 11.9 kA."},{"question":"Where can I buy 3VA1340-5EF42-0BB0 and how is it quoted?","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 your volume and lead-time needs."},{"question":"Does 3VA1340-5EF42-0BB0 include an undervoltage release?","answer":"Yes, it comes with a pre-installed undervoltage release (UVR) as standard, plus two auxiliary switches HP."},{"question":"What are the physical dimensions of 3VA1340-5EF42-0BB0?","answer":"Width 184 mm, height 248 mm, depth 110 mm."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1340-5EF42-0BB0","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/3VA1340-5EF42-0BB0 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}}