{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1140-3GF42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1140-3GF42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1140-3GF42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1140-3GF42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1140-3GF42-0AA0, 4-pole molded case circuit breaker, 40 A rated current, TM240 thermal-magnetic release, breaking capacity 75.6 kA at 240 V AC.","salesMarkdown":"The 75.6 kA interrupting rating at 240 V AC gives substantial fault-current headroom for most industrial service-entrance or feeder applications — at 415 V it still clears 52.5 kA, and at 690 V it holds 11.9 kA, so the same breaker covers mixed-voltage panels without a derating surprise. ## Ratings and thermal performance At 55 °C it drops one amp to 39 A, and by 70 °C it's at 37 A. That thermal curve means a panel builder can load this breaker to its full 40 A in a standard 40 °C environment without over-specifying. Power loss at rated load is 10.8 W — modest for a 4-pole frame, but worth accounting for in a densely packed enclosure. The 3VA1140-3GF42-0AA0 occupies a 101.6 mm wide, 130 mm tall, 70 mm deep footprint — a standard 4-pole MCCB frame that fits most DIN-rail or panel-mount enclosures without surprise. Front face is IP40 rated, so it's protected against tools and solid objects larger than 1 mm; the rest of the breaker body is open to the enclosure for heat dissipation.","metaTitle":"Siemens 3VA1140-3GF42-0AA0 SENTRON MCCB, 40 A, 4-Pole, 75.6","metaDescription":"Siemens SENTRON 3VA1140-3GF42-0AA0 molded case circuit breaker, 40 A rated, 4-pole, TM240 release. Breaking capacity 75.6 kA at 240 V. Active production, available to order. Quoted","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","Maximum":"40 A","Minimum":"40 A","at 240 V":"75.6 kA","at 415 V":"52.5 kA","at 440 V":"32 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","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","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","design of the N-conductor protection":"100%","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"600 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":"0","Switching Capacity Class Of The Circuit Breaker":"N","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=268832&mlfb=3VA1140-3GF42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1140-3GF42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1140-3GF42-0AA0 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — no stock or price figures are published here."},{"question":"What is the breaking capacity of 3VA1140-3GF42-0AA0 at different voltages?","answer":"At 240 V it clears 75.6 kA, at 415 V it clears 52.5 kA, at 440 V it clears 32 kA, and at both 500 V and 690 V it clears 11.9 kA."},{"question":"What compliance documentation does Siemens provide for this MCCB?","answer":"The breaker carries IP40 front protection and is rated for an insulation voltage of 800 V. Standard Siemens documentation covers IEC/UL/CSA compliance for the 3VA series; specific certification marks are verified on the device label."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1140-3GF42-0AA0","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/3VA1140-3GF42-0AA0 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}}