{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-5HL42-0HH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-5HL42-0HH0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-5HL42-0HH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5HL42-0HH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON molded case circuit breaker, 3VA2340-5HL42-0HH0, 4-pole, 400 A, line protection, 187 kA at 240 V, ETU320 release, shunt trip, 2 aux + 1 alarm switch.","salesMarkdown":"The Siemens SENTRON 3VA2340-5HL42-0HH0 is a 4-pole molded case circuit breaker rated for 400 A continuous current at 40 °C, with a rated insulation voltage of 800 V. It's built for line protection duty — think main feeder or large subfeed in a distribution panel where you need selectivity and a high interrupting rating. The interrupting capacity hits 187 kA at 240 V and 121 kA at 415 V and 440 V, so it handles serious fault current without cascading upstream. That kind of rating means you can place it close to the transformer without worrying about the breaker becoming the weak link in a bolted fault. ## Thermal derating and enclosure fit The breaker holds full 400 A up to 50 °C ambient, then derates to 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C. The dimensions are 248 mm high, 184 mm wide, and 110 mm deep. That 184 mm width across four poles is wider than the typical three-pole MCCB; make sure your enclosure backplate or DIN-rail adapter has the real estate before you cut the gland plate. Maximum power loss is 96 W, so factor that into your enclosure thermal rise calculation — especially if you're grouping several breakers in a single section. ## Auxiliary contacts and shunt trip The auxiliary contacts can be wired into a PLC input for breaker status feedback. The integrated auxiliary trip module is order code 3VA9688-0BL30, and the basic switch assembly is 3VA2340-5HL42-0AA0 — both are field-replaceable if a contact wears out.","metaTitle":"Siemens SENTRON 3VA2340-5HL42-0HH0 MCCB, 400 A, 4-Pole, 187","metaDescription":"Siemens SENTRON 3VA2340-5HL42-0HH0 molded case circuit breaker, 400 A rated, 4-pole, 187 kA at 240 V. Active production. Quoted to order.","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","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"121 kA","at 500 V":"75.6 kA","at 690 V":"17 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","Trip indicator":"Yes","Number of poles":"4","Product version":"Line protection","Voltage trigger":"Yes","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"15 000","Undervoltage Release":"No","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Power loss [W] / maximum":"96 W","Auxiliary contact version":"2 auxiliary switches + 1 trip alarm switch HQ","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"400 A","Rated insulation voltage Ui":"800 V","Of The Supplied Basic Switch":"3VA2340-5HL42-0AA0","Design of the auxiliary release":"Shunt trip (STL)","Ground fault monitoring version":"Without","Of The Integrated Auxiliary Trip":"3VA9688-0BL30","Design of the overcurrent release":"ETU320","Protection class IP / on the front":"IP40","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"17","Adjustable response value time / tr min.":"0.5","Undervoltage Release With Leading Contact":"No","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"400 A","Adjustable response value current / li max.":"4 000 A","Adjustable response value current / li min.":"600 A","Adjustable response value current / lr min.":"160 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"3","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","Switching capacity class of the circuit breaker":"M","Max. rated operational current of the frame size":"400 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"Lug terminal","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","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"20 x 1"}},"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=345762&mlfb=3VA2340-5HL42-0HH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5HL42-0HH0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA2340-5HL42-0HH0 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Contact us for current availability and pricing — confirmed at quote time."},{"question":"What is the interrupting capacity of 3VA2340-5HL42-0HH0 at different voltages?","answer":"The interrupting capacity is 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V."},{"question":"What trip unit and auxiliary options come with 3VA2340-5HL42-0HH0?","answer":"It has an ETU320 electronic overcurrent release, a shunt trip (STL) release, and 2 auxiliary switches plus 1 trip alarm switch. No undervoltage release, no communication, and no ground fault monitoring are included."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-5HL42-0HH0","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/3VA2340-5HL42-0HH0 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}}