{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1040-4ED32-0BA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1040-4ED32-0BA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1040-4ED32-0BA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1040-4ED32-0BA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1040-4ED32-0BA0, molded case circuit breaker, 3-pole, 40 A rated, TM210 release, 121 kA at 240 V, 70 mm depth.","salesMarkdown":"It's a 3-pole unit rated at 40 A continuous current (Iu) through 50 °C, with the TM210 thermal-magnetic release handling the overcurrent and short-circuit tripping. That UVR drops the breaker if supply voltage falls below a threshold, which is useful for motor starters or safety circuits where you want the load to drop out on a brownout. At 55 °C it drops to 38.4 A, at 60 °C to 37.6 A, at 65 °C to 36.8 A, and at 70 °C to 36 A. That's a gentle slope — only 10% loss at the top end — so if you're stuffing this breaker into a tight panel with other heat sources, you've got headroom. Mechanical endurance is listed at 15,000 operations — that's the latching endurance, meaning the number of open-close cycles the mechanism is rated for before wear. For a line-protection MCCB that sees infrequent switching (maybe a few dozen operations a year), that's effectively a lifetime supply. The front protection is IP40, so it keeps tools and fingers out but isn't sealed against dust ingress — mount it inside a panel enclosure. ## Breaking Capacity Across Voltages — Coordination Reality This breaker's interrupting rating drops as voltage climbs: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. Those numbers matter for selectivity studies — if your fault current at the panelboard is 65 kA at 415 V, this MCCB handles it cleanly. At 690 V you're limited to 11.9 kA, so on a 690 V system you'd need to verify the available fault current doesn't exceed that, or move to a higher-rated frame. ## Physical Fit — Panel Integration Notes The width at 76.2 mm is a 3-pole frame, so if you're replacing a 3-pole MCCB from another manufacturer, check your existing cutout width; many 3-pole MCCBs land in the 75–80 mm range.","metaTitle":"Siemens 3VA1040-4ED32-0BA0 SENTRON MCCB, 40 A, 3-Pole, 121 k","metaDescription":"Siemens SENTRON 3VA1040-4ED32-0BA0 molded case circuit breaker, 40 A rated, 3-pole, 121 kA breaking at 240 V. TM210 release, undervoltage release included. Active production. 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","at 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 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":"38.4 A","at 60 °C":"37.6 A","at 65 °C":"36.8 A","at 70 °C":"36 A","Trip indicator":"No","Number of poles":"3","Product version":"Line protection","Voltage trigger":"No","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"15 000","Undervoltage Release":"Yes","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Auxiliary contact version":"Without","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"40 A","Rated insulation voltage Ui":"800 V","Design of the auxiliary release":"Undervoltage release (UVR)","Ground fault monitoring version":"Without","Of The Integrated Auxiliary Trip":"3VA9608-0BB11","Design of the overcurrent release":"TM210","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","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"1","Adjustable response value time / tr min.":"1","Max. rated operational voltage Ue with DC":"500 V","Undervoltage Release With Leading Contact":"No","Product extension / optional / motor drive":"No","Adjustable response value current / Ir max.":"40 A","Adjustable response value current / li max.":"400 A","Adjustable response value current / li min.":"400 A","Adjustable response value current / lr min.":"40 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"0","Protective function of the overcurrent release":"LI","Switching capacity class of the circuit breaker":"S","Max. rated operational current of the frame size":"100 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"lug terminal","Arrangement of electrical connectors / for main current circuit":"Front terminal","Type of connectable conductor cross-section, connection screw, width x thickness , max.":"17 x 6.5","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"12 x 0"}},"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=356584&mlfb=3VA1040-4ED32-0BA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1040-4ED32-0BA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1040-4ED32-0BA0 and how is it quoted?","answer":"We supply this part through independent distribution and quote it to order against an RFQ. Availability and current pricing are confirmed at quote time — no stock figures here, but the part is actively manufactured."},{"question":"What is the breaking capacity of 3VA1040-4ED32-0BA0 at 415 V?","answer":"At 415 V AC, the breaking capacity is 75.6 kA. At 240 V it's 121 kA, at 440 V it's 52.5 kA, and at 690 V it's 11.9 kA."},{"question":"Does 3VA1040-4ED32-0BA0 include an undervoltage release?","answer":"Yes, it includes an undervoltage release (UVR) as standard — the design of the auxiliary release is UVR. The integrated auxiliary trip order code is 3VA9608-0BB11."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1040-4ED32-0BA0","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/3VA1040-4ED32-0BA0 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}}