{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA4120-4ED14-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA4120-4ED14-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA4120-4ED14-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA4120-4ED14-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA4120-4ED14-0AA0, 1-pole molded-case circuit breaker, system protection design, 20 A at 40 °C, TM210 thermal-magnetic trip, 65 kA interrupting at 120 V AC.","salesMarkdown":"## Siemens 3VA4120-4ED14-0AA0 — 1-Pole SENTRON MCCB, 20 A, 65 kA IC It carries a TM210 thermal-magnetic trip unit, rated 20 A at 40 °C ambient, with a maximum interrupting capacity of 65 kA at 120 V AC. At 277 V the interrupting rating drops to 25 kA, and at 347 V to 14 kA — the standard derating curve for a 1-pole MCCB as system voltage increases. For a 415 V AC rated operating voltage, the interrupting capability is governed by the device manual's DC-network guidance. ## Thermal-Magnetic Trip and Current Derating The TM210 trip unit provides fixed thermal (overload) and magnetic (short-circuit) protection. The breaker is rated 20 A continuously at 40 °C and 45 °C, derating to 19 A at 50 °C and 55 °C, 18 A at 60 °C and 65 °C, and 17 A at 70 °C. The breaker occupies a single 25.4 mm (1 in) pole width on the DIN rail, with a depth of 75.1 mm (2.96 in) and height of 129.4 mm (5.09 in). The 1-pole footprint matches standard SENTRON 3VA panel layouts; verify the busbar finger-reach depth if the enclosure has a shallow backpan. The storage minimum is the handling limit, not the running limit.","metaTitle":"Siemens 3VA4120-4ED14-0AA0 SENTRON MCCB, 1-Pole, 20A, 65kA a","metaDescription":"Siemens 3VA4120-4ED14-0AA0 SENTRON molded-case circuit breaker, 1-pole, 20A rated at 40°C, 65kA interrupting at 120VAC. TM210 trip unit. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"75.1 mm","Width":"25.4 mm","title":"3VA4120-4ED14-0AA0","Height":"129.4 mm","Maximum":"1 s","Minimum":"1 s","at 120 V":"65 kA","at 277 V":"25 kA","at 347 V":"14 kA","at 40 °C":"20 A","at 45 °C":"20 A","at 50 °C":"19 A","at 55 °C":"19 A","at 60 °C":"18 A","at 65 °C":"18 A","at 70 °C":"17 A","Depth [In]":"2.96 in","Width [In]":"1 in","Height [In]":"5.09 in","description":"circuit breaker 3VA4 UL frame 125 breaking capacity class S 25kA @ 277 V 1-pole, line protection TM210, FTFM, In=20A overload protection Ir=20A fixed short-circuit protection Ii=15 x In clamp connection","Trip Indicator":"No","Number Of Poles":"1","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded-case circuit breaker","Undervoltage Release":"No","Design Of The Product":"System protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"2.8 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Ground-Fault Monitoring Version":"Without","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","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"415 V","Product Extension / Optional / Motor Drive":"No","product designation / according to UL file":"SEAB","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"S","electrical endurance (operating cycles) / at 480 V":"8 000","electrical endurance (operating cycles) / at 600 V":"4 000","marking / according to UL 489 / 100%-rated breaker":"No","Mechanical Service Life (Operating Cycles) / Typical":"15 000","Type Of Electrical Connection / For Main Current Circuit":"Infeed side: Low tab","Arrangement Of Electrical Connectors / For Main Current Circuit":"output side: circular conductor connection"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$53.34","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d69e6b3b8396dc515f9b0ae09010e21c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1058139&mlfb=3VA4120-4ED14-0AA0"},"ai":{"faq":[{"question":"What is the interrupting rating of the 3VA4120-4ED14-0AA0 at 120 V?","answer":"65 kA at 120 V AC, derating to 25 kA at 277 V and 14 kA at 347 V."},{"question":"What is the continuous current rating and how does it derate with temperature?","answer":"Rated 20 A at 40 °C and 45 °C, derating to 19 A at 50–55 °C, 18 A at 60–65 °C, and 17 A at 70 °C."},{"question":"What are the physical dimensions of the 3VA4120-4ED14-0AA0?","answer":"Width 25.4 mm (1 in), depth 75.1 mm (2.96 in), height 129.4 mm (5.09 in) — a standard 1-pole SENTRON 3VA footprint."},{"question":"Where can I buy the 3VA4120-4ED14-0AA0 and get current pricing?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm position."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA4120-4ED14-0AA0","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/3VA4120-4ED14-0AA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}