{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1140-4EF36-0AF0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1140-4EF36-0AF0","canonicalUrl":"https://aoctrl.com/siemens/3VA1140-4EF36-0AF0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1140-4EF36-0AF0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1140-4EF36-0AF0, 3-pole molded case circuit breaker, 40 A rated current, 121 kA interrupting capacity at 240 V AC, line protection design.","salesMarkdown":"The Siemens SENTRON 3VA1140-4EF36-0AF0 is a 3-pole molded case circuit breaker (MCCB) rated for 40 A continuous current across an ambient range of 40 °C to 50 °C, with a slight derating to 37 A at 70 °C. Its interrupting capacity hits 121 kA at 240 V AC and 75.6 kA at 415 V AC, which puts it in the high-fault-current class for industrial distribution panels. ## Sizing and selectivity for the panel At 70 mm deep, 76.2 mm wide, and 130 mm tall, this MCCB fits the standard SENTRON 3VA mounting footprint — same width as the 3VA1110 frame, so it drops into the same panel cutout and busbar arrangement without re-drilling. Power loss maxes out at 10.8 W, which matters for thermal coordination inside a sealed enclosure. ## What's inside the can The supplied basic switch carries order code 3VA11404EF360AA0. The auxiliary switch configuration is 1 HQ auxiliary switch plus 1 HQ trip alarm switch — that's two discrete outputs for remote indication. No communication function, no voltage trigger, no other measurement function.","metaTitle":"Siemens 3VA1140-4EF36-0AF0 SENTRON MCCB, 40A, 3-Pole, 121kA","metaDescription":"Siemens SENTRON 3VA1140-4EF36-0AF0 molded case circuit breaker. 40A rated current, 3-pole, 121kA interrupting capacity at 240V. Active production. Sourced to order against an RFQ.","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":"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":"3VA11404EF360AA0","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":"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=341589&mlfb=3VA1140-4EF36-0AF0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1140-4EF36-0AF0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1140-4EF36-0AF0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What are the key ratings for this MCCB?","answer":"Rated 40 A continuous (derates to 37 A at 70 °C), 3-pole, interrupting capacity of 121 kA at 240 V AC and 75.6 kA at 415 V AC. Insulation voltage is 800 V."},{"question":"What is the physical size of 3VA1140-4EF36-0AF0?","answer":"Depth is 70 mm, width is 76.2 mm, height is 130 mm. That's a 3-inch wide footprint matching other SENTRON 3VA frames."},{"question":"Does this breaker include auxiliary contacts?","answer":"Yes, it ships with one HQ auxiliary switch and one HQ trip alarm switch built in — no separate add-on module needed for status feedback."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1140-4EF36-0AF0","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/3VA1140-4EF36-0AF0 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}}