{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-7HN32-0DA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-7HN32-0DA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-7HN32-0DA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-7HN32-0DA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA series, molded case circuit breaker (MCCB), order code 3VA2340-7HN32-0DA0, 400 A rated continuous current, 3-pole, line protection design, with undervoltage release.","salesMarkdown":"## What this MCCB is and what it does The Siemens SENTRON 3VA2340-7HN32-0DA0 is a 3-pole molded case circuit breaker (MCCB) rated for 400 A continuous current, designed for line protection in distribution panels and switchgear. It carries a 330 kA interrupting capacity at 240 VAC, 242 kA at 415/440 V, 187 kA at 500 V, and 7.5 kA at 690 V — so the same breaker can be specified across multiple voltage levels without swapping frames, as long as the available fault current stays under the curve at the service voltage. ## Thermal performance and derating The breaker holds its full 400 A rating up to 50 °C ambient. Above that it derates linearly: 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C. If the panel runs hot — say a packed enclosure near a furnace line or in a non-conditioned electrical room — the actual continuous current you can pull is the derated figure, not the nameplate 400 A. Plan the load schedule against the ambient the breaker actually sees. ## Built-in undervoltage release This variant ships with an undervoltage release (UVR) as the auxiliary release. That means the breaker trips automatically if the control voltage drops below a set threshold — useful for motor protection schemes where a loss of control power should drop the load, or for emergency-stop circuits that need a positive opening on voltage loss. There is no auxiliary switch included, so if you need a remote status contact, add one separately. ## Physical fit and panel integration Dimensions: 248 mm high, 138 mm wide, 110 mm deep. That is a standard SENTRON 3VA form factor — it mounts on a DIN rail or bolts directly into a switchgear chassis. The 110 mm depth leaves clearance behind a standard 200 mm deep enclosure backplate. Maximum power loss is 98.5 W at rated current, so factor that into the enclosure thermal calculation if the panel is tightly packed. ## Environmental limits Operating temperature range is -25 °C to +70 °C; storage range is -40 °C to +80 °C. The storage limit governs handling and warehousing, not running duty. If the breaker sits in a cold warehouse before installation, it is fine down to -40 °C as long as it is not energized.","metaTitle":"Siemens SENTRON 3VA2340-7HN32-0DA0 MCCB, 400 A, 3-Pole","metaDescription":"Siemens SENTRON 3VA2340-7HN32-0DA0 molded case circuit breaker, 400 A continuous, 3-pole, 330 kA at 240 V. Active production, sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"110 mm","Width":"138 mm","Height":"248 mm","Maximum":"4 000 A","Minimum":"4 000 A","at 240 V":"330 kA","at 415 V":"242 kA","at 440 V":"242 kA","at 500 V":"187 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]":"5.43 in","Height [In]":"9.76 in","Trip Indicator":"No","Number Of Poles":"3","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":"3VA2340-7HN32-0AA0","Design Of The Auxiliary Switch":"Without","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","Of The Integrated Auxiliary Trip Unit":"3VA9608-0BB25","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":"0","Switching Capacity Class Of The Circuit Breaker":"C","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=191133&mlfb=3VA2340-7HN32-0DA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-7HN32-0DA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA2340-7HN32-0DA0 and how do I get a price?","answer":"This part is sourced to order through independent distribution. Submit an RFQ for current pricing and availability confirmation."},{"question":"What is 3VA2340-7HN32-0DA0's continuous current rating?","answer":"It is rated 400 A continuous, holding that full rating up to 50 °C ambient before derating."},{"question":"What breaking capacity does this MCCB have at 240 V?","answer":"It interrupts 330 kA at 240 VAC, with 242 kA at 415/440 V, 187 kA at 500 V, and 7.5 kA at 690 V."},{"question":"Does 3VA2340-7HN32-0DA0 include an undervoltage release?","answer":"Yes, it ships with an undervoltage release (UVR) as the auxiliary release. No auxiliary switch is included."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-7HN32-0DA0","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/3VA2340-7HN32-0DA0 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}}