{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1140-4EF32-0KA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1140-4EF32-0KA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1140-4EF32-0KA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1140-4EF32-0KA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1140-4EF32-0KA0, molded case circuit breaker, 3-pole, 40 A rated at 40 °C, line protection with TM240 thermal-magnetic release and shunt trip (STL), 121 kA breaking capacity at 240 V.","salesMarkdown":"## Siemens SENTRON 3VA1140-4EF32-0KA0 — 40 A MCCB with Shunt Trip The Siemens SENTRON 3VA1140-4EF32-0KA0 is a 3-pole molded case circuit breaker (MCCB) rated for 40 A at 40 °C, designed for line protection with a TM240 thermal-magnetic overcurrent release and an integrated shunt trip (STL) auxiliary release. Rated insulation voltage is 800 V, and breaking capacity reaches 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V — figures that define its fault-clearing capability across common distribution voltages. The shunt trip release allows remote tripping via a control signal, making this MCCB suitable for emergency-stop circuits or supervisory shutdown sequences in a panel. Rated current holds at 40 A from 40 °C through 50 °C, then derates to 39 A at 55 °C and 60 °C, 38 A at 65 °C, and 37 A at 70 °C — a gentle slope that preserves most of the rating in warm enclosures. Maximum power loss is 10.8 W, which factors into thermal budgeting when grouping breakers on a DIN rail. Dimensions are 130 mm height, 76.2 mm width, and 70 mm depth — a compact 3-pole footprint that fits standard Siemens SENTRON mounting bases and panel cutouts.","metaTitle":"Siemens SENTRON 3VA1140-4EF32-0KA0 MCCB, 40A, 3-Pole, 121kA","metaDescription":"Siemens SENTRON 3VA1140-4EF32-0KA0 molded case circuit breaker, 40A rated, 3-pole, 121kA breaking at 240V. Line protection with TM240 release and shunt trip. 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":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 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]":"3 in","Height [In]":"5.12 in","Trip Indicator":"No","Number Of Poles":"3","Voltage Trigger":"Yes","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":"3VA11404EF320AA0","Design Of The Auxiliary Release":"shunt trip (STL)","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","Of The Integrated Auxiliary Trip Unit":"3VA9688-0BL33","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":"0","Switching Capacity Class Of The Circuit Breaker":"S","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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=374388&mlfb=3VA1140-4EF32-0KA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1140-4EF32-0KA0/alternatives.json"},"ai":{"faq":[{"question":"What does the TM240 release designation mean on this MCCB?","answer":"TM240 indicates a thermal-magnetic overcurrent release with a 40 A continuous current rating at 40 °C ambient, providing inverse-time overload protection and instantaneous short-circuit protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1140-4EF32-0KA0","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/3VA1140-4EF32-0KA0 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}}