{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1140-5EF32-0BH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1140-5EF32-0BH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1140-5EF32-0BH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1140-5EF32-0BH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1140-5EF32-0BH0, molded case circuit breaker, 3-pole, 40 A at 40 °C, breaking capacity 187 kA at 240 VAC, undervoltage release, 2 aux + 1 trip alarm switches.","salesMarkdown":"## What this MCCB delivers The Siemens 3VA1140-5EF32-0BH0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection, carrying 40 A continuously at 40 °C ambient — no derating needed until you cross 55 °C, where it drops to 39 A, and 37 A at 70 °C. That 70 °C operating ceiling is the same as the maximum ambient the breaker sees in a hot panel; the storage range of -40 to 80 °C covers transit and warehouse conditions. At 415 V it still handles 121 kA, at 440 V it's 75.6 kA, and at 500/690 V it holds 17 kA. The 3-pole design fits three-phase circuits. An undervoltage release (UVR) is built in — if the control voltage drops below its dropout threshold, the breaker trips, protecting downstream equipment from brownout conditions or restarting on an unstable supply. The basic switch core is 3VA11405EF320AA0, and the insulation voltage is rated at 800 V, which covers most 400/480/690 V systems with margin. ## Panel fit and thermal reality Power loss is 13.3 W maximum — that's the heat the breaker dissipates at full rated current. In a sealed enclosure with multiple breakers, that heat adds up; the thermal derating curve above 55 °C is the guide for grouping.","metaTitle":"Siemens 3VA1140-5EF32-0BH0 MCCB, 40 A, 187 kA at 240 V","metaDescription":"Siemens SENTRON 3VA1140-5EF32-0BH0 molded case circuit breaker, 3-pole, 40 A rated, 187 kA breaking capacity at 240 VAC. Current production, sourced to order. Request a quote.","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":"187 kA","at 415 V":"121 kA","at 440 V":"75.6 kA","at 500 V":"17 kA","at 690 V":"17 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":"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":"3VA11405EF320AA0","Design Of The Auxiliary Switch":"2 auxiliary switches + 1 trip alarm switch 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":"3VA9608-0BB11","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":"M","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":"https://cdn.aoctrl.com/38fb7b67b1ec20e25e77f1c92c335050.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=406287&mlfb=3VA1140-5EF32-0BH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1140-5EF32-0BH0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA1140-5EF32-0BH0 at 240 V?","answer":"187 kA at 240 VAC. At 415 V it is 121 kA, at 440 V it is 75.6 kA, and at 500/690 V it is 17 kA."},{"question":"What is the rated current of this MCCB?","answer":"40 A at 40 °C ambient. It derates to 39 A at 55 °C and 37 A at 70 °C."},{"question":"Where can I buy 3VA1140-5EF32-0BH0?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"Does this breaker include an undervoltage release?","answer":"Yes, it includes an undervoltage release (UVR) as the auxiliary release."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1140-5EF32-0BH0","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/3VA1140-5EF32-0BH0 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}}