{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1140-3EF32-0CA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1140-3EF32-0CA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1140-3EF32-0CA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1140-3EF32-0CA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1140-3EF32-0CA0, molded case circuit breaker, 3-pole, 40 A, line protection, TM240 release, undervoltage release, 75.6 kA at 240 V.","salesMarkdown":"The Siemens SENTRON 3VA1140-3EF32-0CA0 is a 3-pole molded case circuit breaker rated for a continuous current of 40 A at ambient temperatures up to 50 °C, with a thermal-magnetic TM240 overcurrent release and an integrated undervoltage release (UVR). The interrupting ratings are substantial: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V. Above that, it derates linearly: 38.4 A at 55 °C, 37.6 A at 60 °C, 36.8 A at 65 °C, and 36 A at 70 °C. The unit has no auxiliary contacts, no communication function, no phase-failure detection, and no ground-fault monitoring. If you need those, you'll add external modules or choose a different variant. ## Mechanical and dimensional fit The depth of 70 mm means it will clear most shallow enclosures, but verify the gland plate clearance if the breaker is mounted near the back wall. That's typical for a line-protection MCCB — it's not a contactor meant for frequent switching, but it handles routine on-off cycles for maintenance or isolation without wearing out prematurely.","metaTitle":"Siemens 3VA1140-3EF32-0CA0 SENTRON MCCB, 40 A, 3-Pole, Line","metaDescription":"Siemens SENTRON 3VA1140-3EF32-0CA0 molded case circuit breaker, 40 A rated, 3-pole, line protection, 75.6 kA at 240 V. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"76.2 mm","Height":"130 mm","at 240 V":"75.6 kA","at 415 V":"52.5 kA","at 440 V":"32 kA","at 690 V":"10.5 kA","at 40 °C":"40 A","at 45 °C":"40 A","at 50 °C":"40 A","at 55 °C":"38.4 A","at 60 °C":"37.6 A","at 65 °C":"36.8 A","at 70 °C":"36 A","Trip indicator":"No","Number of poles":"3","Product version":"Line protection","Voltage trigger":"No","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"15 000","Undervoltage Release":"Yes","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Auxiliary contact version":"Without","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"40 A","Rated insulation voltage Ui":"800 V","Design of the auxiliary release":"Undervoltage release (UVR)","Ground fault monitoring version":"Without","Of The Integrated Auxiliary Trip":"3VA9608-0BB24","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","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"1","Adjustable response value time / tr min.":"1","Max. rated operational voltage Ue with DC":"500 V","Undervoltage Release With Leading Contact":"No","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"40 A","Adjustable response value current / li max.":"400 A","Adjustable response value current / li min.":"200 A","Adjustable response value current / lr min.":"28 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"0","Protective function of the overcurrent release":"LI","Switching capacity class of the circuit breaker":"N","Max. rated operational current of the frame size":"160 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.":"17 x 6.5","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"12 x 0"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=538803&mlfb=3VA1140-3EF32-0CA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1140-3EF32-0CA0/alternatives.json"},"ai":{"faq":[{"question":"What are the key interrupting ratings for this MCCB?","answer":"The breaker is rated for 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V. These are the maximum fault currents it can safely interrupt at those voltages."},{"question":"What is the rated continuous current and how does it derate with temperature?","answer":"The rated continuous current is 40 A at ambient temperatures up to 50 °C. Above that, it derates to 38.4 A at 55 °C, 37.6 A at 60 °C, 36.8 A at 65 °C, and 36 A at 70 °C."},{"question":"Where can I buy the 3VA1140-3EF32-0CA0?","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 price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1140-3EF32-0CA0","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/3VA1140-3EF32-0CA0 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}}