{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1140-3EF42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1140-3EF42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1140-3EF42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1140-3EF42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1140-3EF42-0AA0, molded case circuit breaker, 4-pole, 40 A, TM240 thermal-magnetic trip unit, 75.6 kA interrupting at 240 V.","salesMarkdown":"## MCCB for line protection — 40 A, 4-pole, TM240 trip The Siemens SENTRON 3VA1140-3EF42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated 40 A, designed for line protection in distribution panels. The interrupting capacity reaches 75.6 kA at 240 V. The breaker is rated 40 A continuously at ambient temperatures from 40 °C through 50 °C. At 55 °C it derates to 39 A, at 65 °C to 38 A, and at 70 °C to 37 A. If your panel ambient runs hot — say, a packed enclosure with drives — factor that derating into your load schedule; the 40 A frame is good for a 37 A continuous load at 70 °C. Dimensions are 130 mm height, 101.6 mm width, and 70 mm depth, which fits standard SENTRON 3VA panel cutouts. Maximum power loss is 10.8 W, worth noting for thermal calculations in sealed enclosures.","metaTitle":"Siemens 3VA1140-3EF42-0AA0 SENTRON MCCB, 40 A, 4-Pole, TM240","metaDescription":"Siemens SENTRON 3VA1140-3EF42-0AA0 molded case circuit breaker, 40 A rated, 4-pole, TM240 trip unit, 75.6 kA at 240 V. Active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"101.6 mm","Height":"130 mm","Maximum":"0 A","Minimum":"0 A","at 240 V":"75.6 kA","at 415 V":"52.5 kA","at 440 V":"32 kA","at 500 V":"11.9 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":"39 A","at 60 °C":"39 A","at 65 °C":"38 A","at 70 °C":"37 A","Depth [In]":"2.76 in","Width [In]":"4 in","Height [In]":"5.12 in","Trip Indicator":"No","Number Of Poles":"4","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","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","design of the N-conductor protection":"without","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"600 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":"0","Switching Capacity Class Of The Circuit Breaker":"N","Mechanical Service Life (Operating Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"nut keeper kit on both ends","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/21f601365a233dfec179744ceea13844.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=123585&mlfb=3VA1140-3EF42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1140-3EF42-0AA0/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1140-3EF42-0AA0","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/3VA1140-3EF42-0AA0 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}}