{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1340-4EF32-0DH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1340-4EF32-0DH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1340-4EF32-0DH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1340-4EF32-0DH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1340-4EF32-0DH0, molded case circuit breaker, 3-pole, 400 A at 40 °C, breaking capacity 121 kA at 240 V AC, TM240 thermal-magnetic release, with undervoltage release and auxiliary switches.","salesMarkdown":"The Siemens SENTRON 3VA1340-4EF32-0DH0 is a 3-pole molded case circuit breaker rated 400 A at 40 °C, with a breaking capacity of 121 kA at 240 V AC. At 415 V it still holds 75.6 kA, and at 690 V it's 11.9 kA, so the SCCR headroom drops fast as voltage climbs; verify your point-of-fault voltage before assuming the top number applies. The TM240 overcurrent release is a thermal-magnetic type — thermal element handles overloads (slow trip, inverse-time curve), magnetic element handles short-circuits (instantaneous). The '240' in TM240 refers to the frame size or release rating, not the amp rating; the actual continuous current is 400 A at 40 °C ambient. That 400 A holds steady up to 50 °C, then derates to 392 A at 55 °C and 367 A at 70 °C. That means if control voltage drops below the dropout threshold, the breaker trips instantly. Useful for emergency-stop circuits or undervoltage protection on motor feeders, but it also means a momentary brownout on the control bus will drop the main. The width is 138 mm for a 3-pole unit; a 4-pole version would be wider. Mounting is standard for SENTRON 3VA frames, so it fits the same panel cutouts and busbar adapters as other breakers in this family.","metaTitle":"Siemens 3VA1340-4EF32-0DH0 SENTRON MCCB, 400 A, 121 kA at 24","metaDescription":"Siemens SENTRON 3VA1340-4EF32-0DH0 molded case circuit breaker, 3-pole, 400 A rated at 40 °C, 121 kA breaking capacity at 240 V. Active production. Available to order. Request quot","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":"0 A","Minimum":"0 A","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]":"5.43 in","Height [In]":"9.76 in","Trip Indicator":"Yes","Number Of Poles":"3","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"Yes","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":"3VA13404EF320AA0","Design Of The Auxiliary Switch":"2 auxiliary switches + 1 trip alarm switch HQ","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","Of The Integrated Auxiliary Trip Unit":"3VA9608-0BB25","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"500 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":"3","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","Switching Capacity Class Of The Circuit Breaker":"S","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,"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=1471258&mlfb=3VA1340-4EF32-0DH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1340-4EF32-0DH0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1340-4EF32-0DH0 and how do I get a price?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit a request for quote to confirm current availability and pricing — no stock count or price is published here."},{"question":"What is the breaking capacity of this MCCB at different voltages?","answer":"At 240 V AC it's 121 kA, at 415 V and 440 V it's 75.6 kA, at 500 V it's 52.5 kA, and at 690 V it drops to 11.9 kA. The interrupting rating depends on the system voltage at the fault point."},{"question":"What compliance documentation does this brand provide for 3VA1340-4EF32-0DH0?","answer":"Siemens SENTRON breakers typically carry UL, CSA, CE, and IEC certifications, and RoHS/REACH compliance declarations are available from the manufacturer. Specific certs for this order code should be confirmed against the nameplate or the Siemens declaration of conformity."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1340-4EF32-0DH0","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/3VA1340-4EF32-0DH0 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}}