{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1140-4EF32-0AH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1140-4EF32-0AH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1140-4EF32-0AH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1140-4EF32-0AH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1140-4EF32-0AH0, 3-pole molded case circuit breaker, 40 A rated continuous current, TM240 thermal-magnetic release, 121 kA interrupting at 240 V, 70 mm depth, 76.2 mm width.","salesMarkdown":"## MCCB for line protection — 40 A, 3-pole, TM240 release Siemens SENTRON 3VA1140-4EF32-0AH0 is a 3-pole molded case circuit breaker rated for 40 A continuous current at 40 °C, with a TM240 thermal-magnetic overcurrent release. It carries 121 kA interrupting capacity at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V — numbers that tell you this breaker handles high-fault utility feeds or transformer secondaries without cascading upstream. ## Thermal derating and continuous current The 40 A rated current holds steady up to 50 °C ambient. 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. ## Auxiliary contacts and trip alarm The trip alarm signals a fault condition independently of the main contacts — useful for remote indication on a PLC digital input or a panel lamp.","metaTitle":"Siemens 3VA1140-4EF32-0AH0 SENTRON MCCB, 40 A, 3-Pole, 121 k","metaDescription":"Siemens SENTRON 3VA1140-4EF32-0AH0 molded case circuit breaker, 40 A rated continuous current, 3-pole, TM240 release, 121 kA at 240 V. Active production. Available to order. Reques","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":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 kA","at 690 V":"11.9 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":"Yes","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":"No","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","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":"40 A","Rated insulation voltage Ui":"800 V","Design of the auxiliary release":"without auxiliaryrelease","Ground fault monitoring version":"Without","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":"3","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","Switching capacity class of the circuit breaker":"S","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=351311&mlfb=3VA1140-4EF32-0AH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1140-4EF32-0AH0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting capacity of 3VA1140-4EF32-0AH0 at different voltages?","answer":"121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. The 415 V figure is the one most relevant for 400 V class three-phase distribution in most industrial panels."},{"question":"What is the closest functional second-source for 3VA1140-4EF32-0AH0?","answer":"The 3VA1010-2ED32-0JA0 is a smaller-frame sibling from the same SENTRON family, but it is a different frame size and current rating — it will not drop into the same panel cutout or bus connection without rewiring. The 3VA1140 frame is the correct physical match for this 40 A rating."},{"question":"What are the physical dimensions of this MCCB?","answer":"Depth 70 mm, width 76.2 mm, height 130 mm. The width matches the standard 3-pole SENTRON footprint for DIN-rail or screw-mount panels."},{"question":"Where can I buy 3VA1140-4EF32-0AH0 and get current pricing?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1140-4EF32-0AH0","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/3VA1140-4EF32-0AH0 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}}