{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1140-3EF32-0AC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1140-3EF32-0AC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1140-3EF32-0AC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1140-3EF32-0AC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1140-3EF32-0AC0, molded case circuit breaker, line protection, 3-pole, 40 A, TM240 thermal-magnetic release, 2 auxiliary switches HQ, IP40 front.","salesMarkdown":"## Part identity and key ratings The Siemens 3VA1140-3EF32-0AC0 is a SENTRON molded case circuit breaker (MCCB) configured for line protection in a 3-pole, 40 A frame. It carries a TM240 thermal-magnetic overcurrent release — fixed thermal and magnetic trip settings, no electronic adjustment — so the trip curve is determined at the factory and not field-configurable. Rated continuous current Iu is 40 A, and the insulation voltage Ui is 800 V. Breaking capacity is specified across four voltage levels: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V. For a 40 A frame these are high-interrupting ratings — the 415 V figure in particular gives headroom for most industrial distribution panels without needing a current-limiting upstream device. Thermal derating is minimal up to 50 °C — the breaker holds its full 40 A rating. Above that it steps down: 38.4 A at 55 °C, 37.6 A at 60 °C, 36.8 A at 65 °C, and 36 A at 70 °C. If the panel ambient runs hot, the 40 A frame still delivers usable capacity without a frame-size jump. ## Auxiliary contacts and panel integration This variant ships with two auxiliary switches (HQ type) built in — no separate add-on module needed for status feedback to a PLC or indication lamp. The auxiliary contacts share the same housing, saving a DIN-rail slot. No undervoltage release, no shunt trip, no ground-fault module on this configuration; if those are required for the application, this is not the right order-code variant. Dimensions are 130 mm height, 76.2 mm width (3-pole), and 70 mm depth. The width matches the standard 3-pole MCCB footprint for panel cutouts or DIN-rail mounting. Front protection is IP40 — suitable for enclosed panel use, not for washdown or outdoor exposure without a secondary enclosure. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The storage limit is the handling and logistics boundary — the breaker can sit in a cold warehouse or hot container without damage, but the operating range governs in-service panel conditions.","metaTitle":"Siemens 3VA1140-3EF32-0AC0 SENTRON MCCB, 40 A, 3-Pole, TM240","metaDescription":"Siemens 3VA1140-3EF32-0AC0 SENTRON molded case circuit breaker, 40 A rated, 3-pole, TM240 thermal-magnetic release, 75.6 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":"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":"No","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Auxiliary contact version":"2 auxiliary switches 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":"2","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","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=165122&mlfb=3VA1140-3EF32-0AC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1140-3EF32-0AC0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1140-3EF32-0AC0 and what is the lead time?","answer":"This part is sourced to order through independent distribution. Availability and current pricing are confirmed at quote time against an RFQ — submit a request for a firm delivery commitment to your project install date."},{"question":"What is the breaking capacity of 3VA1140-3EF32-0AC0 at 415 V?","answer":"The breaking capacity at 415 V is 52.5 kA, which provides substantial fault-current headroom for a 40 A MCCB in most industrial distribution panels."},{"question":"Does 3VA1140-3EF32-0AC0 include auxiliary contacts?","answer":"Yes, it ships with two auxiliary switches (HQ type) integrated — no separate module required for status feedback."},{"question":"What is the thermal derating above 50 °C for this breaker?","answer":"The breaker holds full 40 A up to 50 °C, then 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."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1140-3EF32-0AC0","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/3VA1140-3EF32-0AC0 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}}