{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA4120-5ED54-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA4120-5ED54-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA4120-5ED54-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA4120-5ED54-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA4120-5ED54-0AA0, 1-pole molded-case circuit breaker, 20 A, TM210 LI release, 85 kA at 120 V, 35 kA at 277 V, 18 kA at 347 V, IP40 front, 75.1 × 50.8 × 129.4 mm.","salesMarkdown":"The Siemens SENTRON 3VA4120-5ED54-0AA0 is a 1-pole molded-case circuit breaker (MCCB) in the system-protection version, rated 20 A continuous at 40 °C with a TM210 thermal-magnetic release (LI characteristic — long-time and instantaneous protection). Its interrupting capacity is 85 kA at 120 V AC, 35 kA at 277 V AC, and 18 kA at 347 V AC — numbers that govern where it can be placed in a distribution panel without cascading upstream. The 85 kA at 120 V is the headline figure; the 18 kA at 347 V is the one that matters for 347/600 V wye systems common in Canadian and some US commercial installations. The 75.1 mm depth and 50.8 mm width mean this breaker fits the standard 1-pole footprint in a SENTRON distribution panelboard — no extra gutter space needed for the line-side lugs. ## Thermal derating — real-world current at panel ambient At 50 °C it derates to 19 A, at 60 °C to 18 A, and at 70 °C to 17 A. Maximum power loss is 2.8 W, low enough that ganging multiple 1-pole breakers side-by-side doesn't drive a significant temperature rise in the enclosure. Suitable for indoor panel mounting, not for wet or outdoor locations without an additional enclosure. This is a plain thermal-magnetic breaker for straightforward branch-circuit protection — no auxiliary signaling or remote trip capability built in. UL file MEAB covers the UL listing for the US market.","metaTitle":"Siemens SENTRON 3VA4120-5ED54-0AA0 MCCB, 1-pole, 20 A, 85 kA","metaDescription":"Siemens SENTRON 3VA4120-5ED54-0AA0 molded-case circuit breaker, 1-pole, 20 A, TM210 release, 85 kA at 120 V. Current lifecycle. 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":"50.8 mm","Height":"129.4 mm","at 120 V":"85 kA","at 277 V":"35 kA","at 347 V":"18 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]":"2 in","Height [In]":"5.09 in","Trip Indicator":"No","Number Of Poles":"1","Product version":"System 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":"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","operating voltage / at AC / rated value":"415 V","Product Extension / Optional / Motor Drive":"No","product designation / according to UL file":"MEAB","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":"M","electrical endurance (switching cycles) / at 480 V":"8 000","electrical endurance (switching cycles) / at 600 V":"4 000","marking / according to UL 489 / 100%-rated breaker":"No","Mechanical Service Life (Switching Cycles) / Typical":"15 000","Type Of Electrical Connection / For Main Current Circuit":"Infeed side: Low tab","Type of connectable conductor cross-section, round conductor terminal, stranded":"1 x (14 AWG - 8 AWG)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"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=1058152&mlfb=3VA4120-5ED54-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA4120-5ED54-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Does 3VA4120-5ED54-0AA0 have a trip indicator or communication capability?","answer":"No trip indicator, no undervoltage release, no communication function, and no motor drive option. It is a plain thermal-magnetic breaker for branch-circuit protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA4120-5ED54-0AA0","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/3VA4120-5ED54-0AA0 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}}