{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1140-5EF32-0AC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1140-5EF32-0AC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1140-5EF32-0AC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1140-5EF32-0AC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1140-5EF32-0AC0, molded case circuit breaker, 3-pole, 40 A at 40 °C, TM240 thermal-magnetic release, 187 kA interrupting at 240 V, 2 auxiliary switches HQ, line protection design.","salesMarkdown":"The interrupting ratings climb to 187 kA at 240 V AC and 121 kA at 415 V AC, so it handles high available fault current on a 400 V distribution board without needing a current-limiting fuse upstream. At 55 °C it drops to 39 A, at 65 °C to 38 A, at 70 °C to 37 A. That's a gentle slope; most panel builders can leave it at 40 A unless the cabinet runs hot. The interrupting rating at 415 V (121 kA) is the one that matters for a 400 V distribution board — it's well above typical 25–65 kA SCCR requirements, so you get selectivity headroom without stacking fuses. Power loss is 10.8 W max, which is modest for a 40 A MCCB — helps keep the enclosure heat budget under control. ## Physical fit and auxiliary wiring The breaker measures 130 mm high, 76.2 mm wide, 70 mm deep — standard 3-pole MCCB footprint for a 40 A frame. It ships with two factory-installed HQ auxiliary switches (form C, rated for control-circuit duty), so you don't need to order and snap them on separately. That's another SKU I don't need to track. The base switch is the 3VA11405EF320AA0 variant — this order code adds the aux switches at the factory.","metaTitle":"Siemens 3VA1140-5EF32-0AC0 SENTRON MCCB, 40 A, 3-Pole, 187 k","metaDescription":"Siemens SENTRON 3VA1140-5EF32-0AC0 molded case circuit breaker, 40 A rated at 40 °C, 3-pole, 187 kA at 240 V. Line protection, TM240 release, 2 HQ aux switches. Active production.","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":"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":"3VA11405EF320AA0","Design Of The Auxiliary Switch":"2 auxiliary switches 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":"3VA9988-0AA12","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=427577&mlfb=3VA1140-5EF32-0AC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1140-5EF32-0AC0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA1140-5EF32-0AC0?","answer":"Pricing and availability are confirmed at quote time against an RFQ through independent distribution. Submit an RFQ for current pricing and lead time — no stock count or price is published here."},{"question":"Will 3VA1140-5EF32-0AC0 drop into a panel specified around 3VA1110-5EF32-0AM0 without rewiring?","answer":"Yes, the 3VA1140-5EF32-0AC0 shares the same physical footprint (130 x 76.2 x 70 mm), same 3-pole configuration, same auxiliary switch option, and same interrupting ratings as the 3VA1110-5EF32-0AM0. The only difference is the thermal-magnetic trip unit — 40 A vs 10 A. No rewiring needed if the load current matches the 40 A rating."},{"question":"What compliance documentation does Siemens provide for 3VA1140-5EF32-0AC0?","answer":"As a SENTRON MCCB, this breaker carries UL, CSA, and IEC certifications standard for the series. RoHS and REACH compliance documentation is available from Siemens upon request. The rated insulation voltage of 800 V and interrupting ratings at 240 V, 415 V, 440 V, 500 V, and 690 V are published in the datasheet."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1140-5EF32-0AC0","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/3VA1140-5EF32-0AC0 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}}