{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VM1140-5MH32-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VM1140-5MH32-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VM1140-5MH32-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VM1140-5MH32-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VM1140-5MH32-0AA0, molded case circuit breaker, 3-pole, 640 A maximum, TM120M overcurrent release, interrupting 187 kA at 240 V AC.","salesMarkdown":"## MCCB for 640 A feeder and motor protection The Siemens SENTRON 3VM1140-5MH32-0AA0 is a 3-pole molded case circuit breaker rated for 640 A maximum, with a TM120M thermal-magnetic overcurrent release. It breaks up to 187 kA at 240 V AC and 121 kA at 415 V AC — enough headroom for high-fault panelboards and transformer secondaries. Rated insulation voltage is 800 V, operating voltage 690 V AC, so it covers 480/600 V distribution without derating on voltage. Thermal derating is tight: 40 A continuous through 50 °C, dropping only to 37 A at 70 °C. That means the breaker holds its rating across most panel ambient conditions without upsizing. Dimensions are 70 mm deep, 76.2 mm wide, 130 mm tall — a standard MCCB footprint for DIN-rail or panel-mount installation. IP40 front protection suits enclosed panel use; not rated for washdown environments.","metaTitle":"Siemens SENTRON 3VM1140-5MH32-0AA0 MCCB, 640 A, 3-Pole","metaDescription":"Siemens SENTRON molded case circuit breaker, 640 A max, 3-pole, TM120M release. Interrupting 187 kA at 240 V. Current lifecycle stage. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"76.2 mm","Height":"130 mm","Maximum":"640 A","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"76 kA","at 500 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":"Startetptotection","Communication Function":"No","Phase Failure Detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"4 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Ground-Fault Monitoring Version":"Without","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"TM120M","Design Of Short-Circuit Protection":"For switching capacity values in DC power systems, see the 3VA Molded Case Circuit Breaker Manual; link available under Service & Support in the last chapter","protection class IP / on the front":"IP40","operating voltage / at AC / rated value":"690 V","Max. rated operational voltage Ue with DC":"500 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"I","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"M","Mechanical Service Life (Operating Cycles) / Typical":"15 000","Type Of Electrical Connection / For Main Current Circuit":"nut keeper kit on both ends","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front connection","Type of connectable conductor cross-section, connection screw, width x thickness , max.":"17 x 6.5 mm","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"12 x 1 mm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/be82629451abee9fe4aefb8d0544915b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=578321&mlfb=3VM1140-5MH32-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VM1140-5MH32-0AA0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VM1140-5MH32-0AA0?","answer":"Submit an RFQ through this listing. Pricing and stock are confirmed at quote time through independent distribution channels."},{"question":"What are the interrupting ratings for 3VM1140-5MH32-0AA0?","answer":"187 kA at 240 V AC, 121 kA at 415 V AC, 76 kA at 440 V AC, and 17 kA at 500 V AC. These are the maximum short-circuit current values the breaker can safely interrupt at those voltages."},{"question":"What is the thermal derating curve for this MCCB?","answer":"Rated 40 A continuous through 50 °C ambient, 39 A at 55–60 °C, 38 A at 65 °C, and 37 A at 70 °C. No derating needed below 50 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VM1140-5MH32-0AA0","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/3VM1140-5MH32-0AA0 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}}