{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1140-5EF32-0BC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1140-5EF32-0BC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1140-5EF32-0BC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1140-5EF32-0BC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1140-5EF32-0BC0, molded case circuit breaker (MCCB), 3-pole, 40 A rated current, 187 kA breaking capacity at 240 VAC, line protection design, with undervoltage release and 2 auxiliary switches.","salesMarkdown":"Its breaking capacity reaches 187 kA at 240 VAC, dropping to 121 kA at 415 VAC and 75.6 kA at 440 VAC — figures that govern selectivity coordination with downstream breakers. Rated current holds at 40 A from 40 °C through 50 °C ambient, then derates gradually: 39 A at 55–60 °C, 38 A at 65 °C, and 37 A at 70 °C. Power dissipation at rated load is 13.3 W — a figure to include in enclosure thermal calculations when grouping several breakers. ## Integration — Panel Fit and Wiring Notes Dimensions are 130 mm high, 76.2 mm wide (3 inches), and 70 mm deep. The breaker accepts screw-clamp terminals for cable or busbar connection; the UVR coil terminals are separate and polarity-sensitive if DC-supplied. Mounting is screw-fixed to a mounting plate or DIN rail adapter (not included).","metaTitle":"Siemens 3VA1140-5EF32-0BC0 SENTRON MCCB, 40 A, 3-Pole, 187 k","metaDescription":"Siemens SENTRON 3VA1140-5EF32-0BC0 molded case circuit breaker, 40 A, 3-pole, 187 kA breaking capacity at 240 VAC. Active 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":"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":"3VA11405EF320AA0","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":"3VA9608-0BB11","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":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=42350&mlfb=3VA1140-5EF32-0BC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1140-5EF32-0BC0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1140-5EF32-0BC0 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote (RFQ) to confirm current availability and pricing — no stock or price figures are published here."},{"question":"What is the breaking capacity of 3VA1140-5EF32-0BC0 at different voltages?","answer":"Breaking capacity is 187 kA at 240 VAC, 121 kA at 415 VAC, 75.6 kA at 440 VAC, and 17 kA at both 500 VAC and 690 VAC. These ratings determine selectivity coordination with downstream breakers."},{"question":"Does 3VA1140-5EF32-0BC0 include an undervoltage release?","answer":"Yes, it ships with an undervoltage release (UVR) factory-fitted, plus two auxiliary switches (HQ design) for status feedback."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1140-5EF32-0BC0","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/3VA1140-5EF32-0BC0 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}}