{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1140-4GF42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1140-4GF42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1140-4GF42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1140-4GF42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1140-4GF42-0AA0, molded case circuit breaker, 4-pole, 40 A, TM240 thermal-magnetic release, 121 kA at 240 V AC, line protection.","salesMarkdown":"The Siemens 3VA1140-4GF42-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection — 40 A continuous at 40 °C, 4-pole, with a TM240 thermal-magnetic trip unit. The 121 kA interrupting capacity at 240 V AC means it can clear a bolted fault at that voltage without the arc re-striking or the case rupturing; at 415 V it still holds 75.6 kA, and at 690 V it's rated 11.9 kA. That's enough SCCR headroom for most 480 V distribution panels downstream of a transformer. The TM240 release is a fixed thermal-magnetic — no electronic adjustment, no communication module, no undervoltage release. It's a straightforward line-protection breaker: trip curve is what it is, no fiddling. ## Thermal derating — the real-world current At 55 °C it's 39 A, at 65 °C it's 38 A, and at 70 °C it's 37 A. The 3VA1140-4GF42-0AA0 measures 130 mm high, 101.6 mm wide, and 70 mm deep.","metaTitle":"Siemens 3VA1140-4GF42-0AA0 SENTRON MCCB, 40 A, 4-Pole, 121 k","metaDescription":"Siemens 3VA1140-4GF42-0AA0 SENTRON molded case circuit breaker, 40 A, 4-pole, TM240 release, 121 kA at 240 V. Current lifecycle. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"101.6 mm","Height":"130 mm","at 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 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]":"4 in","Height [In]":"5.12 in","Trip Indicator":"No","Number Of Poles":"4","Product version":"Line protection","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","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","rated insulation voltage Ui":"800 V","Ground-Fault Monitoring Version":"Without","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","design of the N-conductor protection":"100%","operating voltage / at AC / rated value":"690 V","Max. rated operational voltage Ue with DC":"600 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"S","Mechanical Service Life (Switching 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","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/80c210b5234a6abc2e3b55ad980a29df.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=225104&mlfb=3VA1140-4GF42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1140-4GF42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1140-4GF42-0AA0 and what's the price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price figure is published here."},{"question":"What are the key interrupting ratings for 3VA1140-4GF42-0AA0?","answer":"At 240 V it's rated 121 kA, at 415 V it's 75.6 kA, at 440 V it's 52.5 kA, and at 500 V and 690 V it's 11.9 kA. The rated operational voltage is 690 V AC."},{"question":"Will 3VA1140-4GF42-0AA0 drop into a panel specified around 3VA1110-5MH36-0AA0?","answer":"The 3VA1140-4GF42-0AA0 is a 4-pole, 40 A breaker with a TM240 release; the 3VA1110-5MH36-0AA0 is a different frame size and rating. Panel cutouts and bus connections differ between the 3VA1 frame variants — verify the mounting footprint and lug spacing before assuming a drop-in swap."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1140-4GF42-0AA0","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/3VA1140-4GF42-0AA0 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}}