{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1140-4EF32-0DC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1140-4EF32-0DC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1140-4EF32-0DC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1140-4EF32-0DC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON, 3VA1140-4EF32-0DC0, Molded case circuit breaker, 3-pole, 40 A at 40 °C, breaking capacity 121 kA at 240 V AC, with undervoltage release.","salesMarkdown":"It carries a 121 kA breaking capacity at 240 V AC, stepping down to 75.6 kA at 415 V and 52.5 kA at 440 V — numbers that tell you this breaker handles high-fault panels without cascading upstream. An integrated undervoltage release (UVR) means it can drop the load on loss of control power, which is what you want on a safety-critical feeder or a motor control center. The 40 A rating holds flat from 40 °C to 50 °C — no derating in a warm enclosure — then eases to 39 A at 55–60 °C and 37 A at 70 °C. That thermal curve matters when you're packing breakers side-by-side in a switchboard. The 121 kA at 240 V is the headline interrupting rating; the 75.6 kA at 415 V is what you coordinate against downstream devices in a 400 V distribution board. Footprint: 76.2 mm wide (3 in), 130 mm tall (5.12 in), 70 mm deep (2.76 in). It ships with two auxiliary switches (HQ design) and the undervoltage release pre-integrated — no extra wiring for the UVR coil if you're already running a control voltage. Power loss maxes at 13.3 W, so heat buildup in a dense lineup is manageable.","metaTitle":"Siemens 3VA1140-4EF32-0DC0 SENTRON MCCB, 40 A, 3-Pole, 121 k","metaDescription":"Siemens SENTRON 3VA1140-4EF32-0DC0 molded case circuit breaker, 40 A rated at 40 °C, 3-pole, breaking capacity 121 kA at 240 V AC. Current lifecycle. Sourced 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":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"Yes","Design Of The Product":"Line protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"13.3 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 Switch":"2 auxiliary switches HQ","Design Of The Auxiliary Release":"undervoltage release (UVR)","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":"3VA9608-0BB25","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":"3VA9988-0AA12","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=340836&mlfb=3VA1140-4EF32-0DC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1140-4EF32-0DC0/alternatives.json"},"ai":{"faq":[{"question":"Will 3VA1140-4EF32-0DC0 drop into a panel specified around 3VA1110-5ED36-0AC0?","answer":"The 3VA1140 is a different frame rating (40 A vs the 3VA1110's typical lower range) and carries a different breaking capacity curve and accessory set. Physically it shares the same SENTRON 3VA platform footprint, so it will bolt into the same mounting holes and bus bars, but the trip unit and protection settings differ — you'd need to verify the coordination study if swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1140-4EF32-0DC0","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/3VA1140-4EF32-0DC0 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}}