{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1140-5EF36-0AF0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1140-5EF36-0AF0","canonicalUrl":"https://aoctrl.com/siemens/3VA1140-5EF36-0AF0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1140-5EF36-0AF0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1140-5EF36-0AF0, molded case circuit breaker (MCCB), 3-pole, 40 A rated at 40 °C, TM240 thermal-magnetic release, breaking capacity 187 kA at 240 V AC.","salesMarkdown":"The breaker holds the unit on the grid for feeder circuits in industrial switchboards, motor control centers, or building power distribution, provided the available fault current stays within the published breaking capacities. ## Breaking capacity — the real number depends on your system voltage This MCCB delivers 187 kA at 240 V AC, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. At 690 V the breaker still clears 17 kA, which is adequate for many 690 V motor circuits but not for a main tie near a utility transformer. ## Current derating — the 40 A rating holds to 50 °C At 55 °C it derates to 39 A, at 65 °C to 38 A, and at 70 °C to 37 A. ## Physical fit and auxiliary switch configuration The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — standard 3-pole MCCB footprint for the 3VA frame size. The auxiliary switch signals the open/closed state; the trip alarm switch indicates a trip from the overcurrent release, not from manual opening. Both are wired to the terminal block on the front face.","metaTitle":"Siemens 3VA1140-5EF36-0AF0 SENTRON MCCB, 40 A, 3-Pole, 187 k","metaDescription":"Siemens 3VA1140-5EF36-0AF0 SENTRON molded case circuit breaker, 40 A rated, 3-pole, TM240 release, breaking capacity 187 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","Maximum":"0 A","Minimum":"0 A","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"75.6 kA","at 500 V":"17 kA","at 690 V":"17 kA","at 40 °C":"40 A","at 45 °C":"40 A","at 50 °C":"40 A","at 55 °C":"39 A","at 60 °C":"39 A","at 65 °C":"38 A","at 70 °C":"37 A","Depth [In]":"2.76 in","Width [In]":"3 in","Height [In]":"5.12 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":"No","Design Of The Product":"Line protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"10.8 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA11405EF360AA0","Design Of The Auxiliary Switch":"1 auxiliary switch + 1 trip alarm switch HQ","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","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":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","Switching Capacity Class Of The Circuit Breaker":"M","Mechanical Service Life (Operating Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"box terminal on both sides","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal"}},"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=55177&mlfb=3VA1140-5EF36-0AF0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1140-5EF36-0AF0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this MCCB at 415 V?","answer":"At 415 V AC the breaking capacity is 121 kA. At 240 V it is 187 kA, at 440 V it is 75.6 kA, and at 500 V or 690 V it is 17 kA."},{"question":"What auxiliary switches come with 3VA1140-5EF36-0AF0?","answer":"It is fitted with one auxiliary switch and one trip alarm switch (HQ type), factory-installed. The auxiliary switch signals the breaker position; the trip alarm switch signals an overcurrent trip."},{"question":"Where can I buy 3VA1140-5EF36-0AF0 and how is it quoted?","answer":"This MCCB is sourced to order through independent distribution. Submit an RFQ for current availability and pricing — stock and lead time are confirmed at quote time."},{"question":"What is the rated current of this breaker at elevated ambient temperatures?","answer":"Rated 40 A continuous from 40 °C to 50 °C. It derates to 39 A at 55 °C, 38 A at 65 °C, and 37 A at 70 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1140-5EF36-0AF0","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/3VA1140-5EF36-0AF0 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}}