{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1140-4EF36-0KH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1140-4EF36-0KH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1140-4EF36-0KH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1140-4EF36-0KH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1140-4EF36-0KH0, molded case circuit breaker, 3-pole, 40 A rated at 40 °C, 121 kA interrupting at 240 V, line protection design, with shunt trip (STL) and 2 auxiliary + 1 trip alarm switch HQ.","salesMarkdown":"It carries a continuous current rating of 40 A at 40 °C ambient, with a 121 kA interrupting capacity at 240 V AC — that's the short-circuit current it can safely clear without welding contacts or rupturing the case. The 800 V rated insulation voltage means it's built for 480/600 V class systems with headroom. ## Breaking capacity across voltages Interrupting rating drops as voltage rises: 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V (–). That 11.9 kA at 690 V is the limiting figure for high-voltage industrial feeds — if your fault current exceeds that at the higher voltage, you need a larger frame or upstream current-limiting fuse. The 121 kA at 240 V covers most commercial secondary-side applications. ## Thermal derating and ambient limits Rated 40 A from 40 °C through 50 °C ambient (–). At 55 °C it derates to 39 A, at 65 °C to 38 A, and at 70 °C to 37 A (–). If this breaker sits in a non-conditioned enclosure near a heat source, use the 37 A figure at 70 °C for your load calculation — don't spec it at the 40 A nameplate. ## Auxiliary and release configuration The shunt trip allows remote tripping via a control voltage — useful for emergency-stop circuits or interlocking with a fire-suppression panel. No communication module — it's a standalone breaker, not a power-monitoring node. Width 76.2 mm (3 in), height 130 mm (5.12 in), depth 70 mm (2.76 in) (–, –).","metaTitle":"Siemens 3VA1140-4EF36-0KH0 SENTRON MCCB, 40A, 121kA at 240V","metaDescription":"Siemens SENTRON 3VA1140-4EF36-0KH0 molded case circuit breaker, 40A rated, 121kA interrupting at 240V. 3-pole line protection with shunt trip. 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":"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":"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":"3VA11404EF360AA0","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":"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":"3","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","Switching Capacity Class Of The Circuit Breaker":"S","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=215627&mlfb=3VA1140-4EF36-0KH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1140-4EF36-0KH0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting capacity of 3VA1140-4EF36-0KH0 at 240 V?","answer":"121 kA at 240 V AC. At 415 V it's 75.6 kA, at 440 V it's 52.5 kA, and at 500/690 V it's 11.9 kA (–)."},{"question":"Does 3VA1140-4EF36-0KH0 include a shunt trip?","answer":"Yes, it includes a shunt trip release (STL) plus 2 auxiliary switches and 1 trip alarm switch (HQ). No undervoltage release or ground-fault monitoring."},{"question":"Where can I buy 3VA1140-4EF36-0KH0?","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 commitment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1140-4EF36-0KH0","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/3VA1140-4EF36-0KH0 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}}