{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1140-3EF32-0CH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1140-3EF32-0CH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1140-3EF32-0CH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1140-3EF32-0CH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON molded case circuit breaker, 3VA1140-3EF32-0CH0, 3-pole line protection, 40 A at 40 °C, breaking capacity 75.6 kA at 240 V, with undervoltage release and auxiliary switches.","salesMarkdown":"If the ambient rises to 70 °C the breaker still carries 37 A, so the full 40 A rating holds across most real-world panel conditions without derating until you push past 55 °C. ## Breaking capacity — where it interrupts and where it doesn't At 415 V the rating drops to 52.5 kA, at 440 V to 32 kA, and at 500 V and 690 V it holds at 11.9 kA. No exceptions. ## Built-in undervoltage release — why it matters for safety circuits When line voltage drops below the release threshold, the UVR trips the breaker open and keeps it from re-closing until voltage is restored and the release is manually reset. That is the standard way to implement emergency-stop or safety-shutdown circuits that must stay off after a power loss, and it also protects motors and other loads from automatic restart after a brownout. The UVR is listed as part of the breaker's design, not a field-add-on kit. ## Auxiliary switching and trip indication The breaker includes two auxiliary switches plus one trip-alarm switch (HQ) — the HQ contact changes state only when the breaker trips on fault, not on manual open. That lets a PLC or annunciator distinguish between a deliberate shutdown and a fault event. A trip indicator on the front face gives local visual confirmation without opening the panel door. The 3VA1140-3EF32-0CH0 measures 76.2 mm wide by 130 mm tall by 70 mm deep — a standard 3-pole MCCB footprint that fits Siemens SENTRON distribution blocks and most DIN-rail or mounting-plate layouts.","metaTitle":"Siemens 3VA1140-3EF32-0CH0 SENTRON MCCB, 40 A, 3-Pole, 75.6","metaDescription":"Siemens SENTRON 3VA1140-3EF32-0CH0 molded case circuit breaker, 40 A rated at 40°C, 3-pole, breaking capacity 75.6 kA at 240 V. 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":"75.6 kA","at 415 V":"52.5 kA","at 440 V":"32 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":"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":"3VA11403EF320AA0","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":"3VA9608-0BB24","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":"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=250877&mlfb=3VA1140-3EF32-0CH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1140-3EF32-0CH0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1140-3EF32-0CH0 and how do I get a price?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability confirmation at quote time."},{"question":"Will 3VA1140-3EF32-0CH0 drop into a panel specified around 3VA1110-5EF32-0AM0 without rewiring?","answer":"Both are 3-pole SENTRON MCCBs in the same physical frame family, so the footprint and bus-bar spacing are the same. The 3VA1140-3EF32-0CH0 carries a higher continuous rating (40 A vs the 3VA1110's lower rating) and different interrupting capacity — verify the available fault current at the panel's line side before swapping. No rewiring needed for the mounting, but the upstream protection coordination must be checked."},{"question":"What is the breaking capacity of this MCCB at 415 V?","answer":"At 415 V the breaking capacity is 52.5 kA."},{"question":"What compliance documentation is available for 3VA1140-3EF32-0CH0?","answer":"As a Siemens SENTRON product, this MCCB carries CE marking for the European market and is designed to meet IEC 60947-2. UL and CSA listings are standard for the series; confirm specific certification marks for your jurisdiction at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1140-3EF32-0CH0","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/3VA1140-3EF32-0CH0 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}}