{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1140-4EF32-0AG0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1140-4EF32-0AG0","canonicalUrl":"https://aoctrl.com/siemens/3VA1140-4EF32-0AG0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1140-4EF32-0AG0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1140-4EF32-0AG0, 3-pole molded case circuit breaker, 40 A rated continuous current, TM240 thermal-magnetic release, 121 kA interrupting at 240 V.","salesMarkdown":"The Siemens 3VA1140-4EF32-0AG0 is a SENTRON 3-pole molded case circuit breaker rated for 40 A continuous current at 40 °C ambient, with a TM240 thermal-magnetic release. Its interrupting ratings climb to 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V — numbers that govern its placement in a selective coordination study. ## What the interrupting ratings mean for fit The 121 kA at 240 V and 75.6 kA at 415 V are the SCCR values that determine whether this breaker can be used ahead of a transformer or on a high-capacity bus. A 240 V panel with a 100 kA available fault current is covered; a 480 V panel at 65 kA is not — the 440 V rating of 52.5 kA is the relevant figure for most North American 480/277 V systems. The 690 V rating of 11.9 kA is low enough that this breaker should not be the sole protection on a high-fault 690 V motor control center without a current-limiting upstream device. ## Thermal derating and endurance The 40 A rating holds flat from 40 °C to 50 °C, then derates: 38.4 A at 55 °C, 37.6 A at 60 °C, 36.8 A at 65 °C, and 36 A at 70 °C. In a sealed enclosure with a 60 °C internal ambient, plan for 37.6 A continuous — not the full 40 A. At 76.2 mm wide, 130 mm tall, and 70 mm deep, this breaker fits a standard 3-pole MCCB footprint on a DIN rail or panel-mount base. The TM240 release is thermal-magnetic, fixed-trip, non-adjustable — so the 40 A rating is set at the factory and cannot be dialed up for temporary overloads.","metaTitle":"Siemens 3VA1140-4EF32-0AG0 SENTRON MCCB, 40 A, 121 kA at 240","metaDescription":"Siemens 3VA1140-4EF32-0AG0 SENTRON molded case circuit breaker, 3-pole, 40 A rated, TM240 release, 121 kA at 240 V. Current 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":"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":"1 auxiliary switch + 1 trip alarm switch HP","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":"3VA9988-0AB11","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=134179&mlfb=3VA1140-4EF32-0AG0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1140-4EF32-0AG0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1140-4EF32-0AG0 and how is it quoted?","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."},{"question":"What are the key interrupting ratings for 3VA1140-4EF32-0AG0?","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. These are the SCCR values that determine coordination with upstream and downstream devices."},{"question":"What is the thermal derating curve for this breaker?","answer":"40 A from 40 °C to 50 °C, then 38.4 A at 55 °C, 37.6 A at 60 °C, 36.8 A at 65 °C, and 36 A at 70 °C. In a hot enclosure, use the derated value."},{"question":"Does 3VA1140-4EF32-0AG0 have auxiliary contacts?","answer":"Yes, it comes with 1 auxiliary switch and 1 trip alarm switch (HP type) for status feedback to a control system."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1140-4EF32-0AG0","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/3VA1140-4EF32-0AG0 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}}