{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1040-3ED42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1040-3ED42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1040-3ED42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1040-3ED42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1040-3ED42-0AA0, 4-pole molded case circuit breaker (MCCB), 40 A rated current, TM210 thermal-magnetic release, line protection design.","salesMarkdown":"## What it is and what it does The Siemens SENTRON 3VA1040-3ED42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 40 A at 40 °C, designed for line protection in distribution panels. It carries a TM210 thermal-magnetic overcurrent release — meaning the thermal element handles overloads and the magnetic element handles short-circuits, with a fixed trip threshold. The rated insulation voltage is 800 V, so it's comfortable in 400 VAC and 480 VAC systems with headroom. Breaking capacity is the spec that decides whether this breaker clears a fault or welds shut. At 240 V it interrupts 75.6 kA; at 415 V it's 52.5 kA; at 440 V it drops to 32 kA; at 500 V and 690 V it holds at 7.5 kA. For a 40 A frame, those numbers are strong — it handles high available fault current on the secondary side of a typical 1000 kVA transformer without needing a current-limiting fuse upstream. Power loss is 10.8 W maximum — negligible for thermal budgeting in a crowded panel, but worth noting if you're packing multiple breakers side-by-side without forced ventilation. ## Where it goes and how it fits This MCCB mounts on a DIN rail or directly to a backplate via the standard 3VA footprint. The width is 101.6 mm (4 in), depth 70 mm (2.76 in), height 130 mm (5.12 in). That 70 mm depth is shallow enough to clear most gland plates and backpanel wiring ducts without interference — a common pain point with deeper frames. IP40 on the front means it's protected against tools and wires >1 mm, but not against dust ingress; keep it inside a closed enclosure. Operating temperature range is -25 °C to 70 °C, with the full 40 A rating holding up to 50 °C. Above that it derates linearly to 37 A at 70 °C. Storage range is -40 °C to 80 °C. If the panel sits in a hot attic or near a furnace, check the derating curve against your actual load.","metaTitle":"Siemens SENTRON 3VA1040-3ED42-0AA0 4P MCCB, 40 A, TM210","metaDescription":"Siemens SENTRON 3VA1040-3ED42-0AA0 4-pole molded case circuit breaker, 40 A rated at 40 °C, TM210 release, breaking capacity 75.6 kA at 240 V. Active production. Available 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":"101.6 mm","Height":"130 mm","Maximum":"0 A","Minimum":"0 A","at 240 V":"75.6 kA","at 415 V":"52.5 kA","at 440 V":"32 kA","at 500 V":"7.5 kA","at 690 V":"7.5 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":"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","design of the N-conductor protection":"without","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":"No","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":"https://cdn.aoctrl.com/71aed9706269de9fd88137b85b2ec2c4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=345081&mlfb=3VA1040-3ED42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1040-3ED42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this MCCB at different voltages?","answer":"At 240 V it interrupts 75.6 kA; at 415 V it's 52.5 kA; at 440 V it's 32 kA; at 500 V and 690 V it holds at 7.5 kA."},{"question":"Where can I buy 3VA1040-3ED42-0AA0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"Does 3VA1040-3ED42-0AA0 include a shunt trip or undervoltage release?","answer":"No. This order code has no undervoltage release, no shunt trip, no communication function, and no ground-fault monitoring. It is a bare thermal-magnetic breaker with a TM210 release."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1040-3ED42-0AA0","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/3VA1040-3ED42-0AA0 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}}