{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1040-3ED32-0KH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1040-3ED32-0KH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1040-3ED32-0KH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1040-3ED32-0KH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON, Molded case circuit breaker, 3VA1040-3ED32-0KH0, 3-pole, 40 A at 40 °C, breaking capacity 75.6 kA at 240 V, line protection design.","salesMarkdown":"## Rated current and breaking capacity — what drives the fit The Siemens 3VA1040-3ED32-0KH0 is a 3-pole SENTRON molded case circuit breaker rated 40 A at 40 °C, with a continuous current that holds flat to 40 A through 50 °C before derating begins — at 55 °C it carries 38.4 A, at 70 °C it carries 36 A. That thermal profile means the breaker can be applied in a 50 °C panel without any ampacity haircut, which is common in enclosed switchgear or high-ambient machine cabinets. Its interrupting capacity is 75.6 kA at 240 V, 52.5 kA at 415 V, and 32 kA at 440 V — figures that put it in the high-fault category for a 40 A frame. At 500 V and 690 V the rating drops to 7.5 kA, so the breaker is best applied on 240 V to 480 V distribution where fault currents are substantial. ## Line protection design and auxiliary options This variant is configured for line protection — meaning the thermal-magnetic trip curve is set to protect cable and bus runs, not motor or generator circuits. The breaker does not include an undervoltage release or ground-fault monitoring, so if those functions are required on the BOM, they must be added externally or a different 3VA variant selected. Communication function is also absent — this is a standalone thermal-magnetic MCCB, not a metering or networked unit. The 3VA1040-3ED32-0KH0 measures 130 mm high, 76.2 mm wide, and 70 mm deep — a compact 3-pole footprint that fits standard SENTRON mounting bases and busbar systems. Maximum power dissipation is 10.8 W, which is modest for a 40 A frame. In a densely packed panel this keeps internal temperature rise manageable, but the derating curve above 50 °C should still be checked against the enclosure's thermal profile.","metaTitle":"Siemens 3VA1040-3ED32-0KH0 SENTRON MCCB, 40 A, 3-Pole, 75.6","metaDescription":"Siemens 3VA1040-3ED32-0KH0 SENTRON molded case circuit breaker, 40 A rated at 40 °C, 3-pole, breaking capacity 75.6 kA at 240 V. Current lifecycle stage. Sourced to order against R","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":"75.6 kA","at 415 V":"52.5 kA","at 440 V":"32 kA","at 500 V":"7.5 kA","at 690 V":"7.5 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","Depth [In]":"2.76 in","Width [In]":"3 in","Height [In]":"5.12 in","Trip Indicator":"Yes","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":"3VA10403ED320AA0","Design Of The Auxiliary Switch":"2 auxiliary switches + 1 trip alarm switch HQ","Design Of The Auxiliary Release":"shunt trip (STL)","Ground-Fault Monitoring Version":"Without","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"TM210","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":"No","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"3","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=353163&mlfb=3VA1040-3ED32-0KH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1040-3ED32-0KH0/alternatives.json"},"ai":{"faq":[{"question":"Does this breaker include an undervoltage release or ground-fault monitoring?","answer":"No, this variant does not include an undervoltage release and has no ground-fault monitoring. It does include a shunt trip release for remote tripping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1040-3ED32-0KH0","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/3VA1040-3ED32-0KH0 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}}