{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-5HN42-0BL0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-5HN42-0BL0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-5HN42-0BL0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5HN42-0BL0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2340-5HN42-0BL0, molded case circuit breaker, line protection, 4-pole, 400 A continuous, 187 kA interrupting at 240 V, undervoltage release, 2 aux + 1 trip + 1 electrical alarm switch.","salesMarkdown":"The Siemens SENTRON 3VA2340-5HN42-0BL0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, carrying 400 A continuous current with no derating from 40 °C through 50 °C. At 55 °C it holds 385 A, at 70 °C it holds 340 A — the thermal curve is published, so panel ambient temperature drives the real ampacity, not the nameplate. Interrupting capacity is 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V. That 690 V figure is the limiting case for 3-phase systems above 480 V — verify the fault current at the service entrance against the 7.5 kA ceiling before specifying. In a 55 °C panel — common in enclosed switchgear with multiple breakers — the usable current drops to 385 A, a 3.75 % reduction. At 70 °C it is 340 A, a 15 % reduction. The thermal derating curve is the selection gate, not the 400 A label. The interrupting capacity at 690 V is 7.5 kA — that is the weakest point on the voltage curve. If the available fault current at 690 V exceeds that figure, this breaker cannot clear it. For 480 V systems the 75.6 kA rating at 500 V is the relevant bound. Dimensions: 248 mm height, 184 mm width, 110 mm depth. The 184 mm width on a 4-pole frame is the critical panel cut-out dimension — verify the backpanel gland plate or mounting plate has that clearance before committing the drill pattern. The UVR coil must see rated voltage to close; a drop-out below the holding threshold trips the breaker — plan the control transformer and UPS feed accordingly. Maximum power loss is 98.5 W at rated current. In a sealed, multi-breaker enclosure that heat must be evacuated — factor it into the thermal budget alongside the derating curve above.","metaTitle":"Siemens 3VA2340-5HN42-0BL0 SENTRON MCCB, 400A, 4-Pole, 187kA","metaDescription":"Siemens SENTRON 3VA2340-5HN42-0BL0 molded case circuit breaker, 400A continuous, 4-pole, 187kA interrupting at 240V. Active production. 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","Height":"248 mm","Maximum":"4 000 A","Minimum":"4 000 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":"7.5 kA","at 40 °C":"400 A","at 45 °C":"400 A","at 50 °C":"400 A","at 55 °C":"385 A","at 60 °C":"370 A","at 65 °C":"355 A","at 70 °C":"340 A","Depth [In]":"4.33 in","Width [In]":"7.24 in","Height [In]":"9.76 in","Trip Indicator":"Yes","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":"98.5 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA2340-5HN42-0AA0","Design Of The Auxiliary Switch":"2 auxiliary switches + 1 trip alarm switch + 1 electrical alarm switch HQ","Design Of The Auxiliary Release":"undervoltage release (UVR)","Ground-Fault Monitoring Version":"Without","Continuous Current / Rated Value":"400 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU350","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 50%; 100%","Of The Integrated Auxiliary Trip Unit":"3VA9608-0BB11","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","reference code / according to IEC 81346-2":"Q","Continuous Current / Rated Value / Maximum":"400 A","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LSI","number of CO contacts / for auxiliary contacts":"4","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB22","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/c1b3b6c5f6d67465025ac41848ceb75e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=400562&mlfb=3VA2340-5HN42-0BL0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5HN42-0BL0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA2340-5HN42-0BL0 and how do I get a price?","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 a firm commercial offer."},{"question":"Will 3VA2340-5HN42-0BL0 drop into a panel specified around 3VA2116-5HL32-0AK0 without rewiring?","answer":"No — the 3VA2340-5HN42-0BL0 is a 400 A, 4-pole frame (184 mm wide) while the 3VA2116-5HL32-0AK0 is a smaller 160 A, 3-pole frame. The width, pole count, and lug arrangement differ; a panel designed for the 160 A breaker would need rework to accept this 400 A unit."},{"question":"What is 3VA2340-5HN42-0BL0's interrupting capacity at 415 V?","answer":"121 kA at 415 V and 440 V. At 500 V it drops to 75.6 kA, and at 690 V it is 7.5 kA."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-5HN42-0BL0","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/3VA2340-5HN42-0BL0 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}}