{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-4EE36-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-4EE36-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-4EE36-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EE36-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-4EE36-0AA0, molded case circuit breaker, 3-pole, 20 A rated current, TM220 thermal-magnetic trip unit, breaking capacity 121 kA at 240 V AC.","salesMarkdown":"Breaking capacity is the headline here: 121 kA at 240 V AC, 75.6 kA at 415 V, and still 52.5 kA at 440 V. That puts it well above typical fault-current levels for most industrial service-entrance or sub-distribution boards, so you get selectivity headroom without stepping up to a larger frame. ## Ratings that matter for panel fit The 20 A rating holds steady from 40 °C through 55 °C, then derates to 19 A at 60–70 °C — useful if the breaker sits near transformers or drives in a warm enclosure. Dimensions are 76.2 mm wide (3 in), 130 mm tall, 70 mm deep — standard 3-pole MCCB footprint for DIN-rail or panel-mount. If you're filling a panel originally specified with the 3VA1110-5ED36-0AA0 (a 16 A variant in the same frame), the 3VA1120-4EE36-0AA0 shares the same physical footprint and terminal layout — no rewiring needed, just a higher current rating if the load allows it. ## Deployment context The 3-pole design with TM220 trip means it's a fit for feeder circuits, lighting panels, and small motor branch circuits where a thermal-magnetic curve is acceptable and no electronic trip adjustments are needed.","metaTitle":"Siemens 3VA1120-4EE36-0AA0 SENTRON MCCB, 20A, 3-Pole, 121kA","metaDescription":"Siemens SENTRON 3VA1120-4EE36-0AA0 molded case circuit breaker, 20A rated, 3-pole, TM220 trip unit. Breaking capacity 121kA at 240V AC. 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":"70 mm","Width":"76.2 mm","Height":"130 mm","Maximum":"0 A","Minimum":"0 A","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":"20 A","at 45 °C":"20 A","at 50 °C":"20 A","at 55 °C":"20 A","at 60 °C":"19 A","at 65 °C":"19 A","at 70 °C":"19 A","Depth [In]":"2.76 in","Width [In]":"3 in","Height [In]":"5.12 in","Trip Indicator":"No","Number Of Poles":"3","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":"12 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":"TM220","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":"690 V","operating voltage / at DC / rated value":"500 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":"S","Mechanical Service Life (Operating Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"box terminal on both sides","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/dca4e0f0ead23de1e8f9971842409aee.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=201005&mlfb=3VA1120-4EE36-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EE36-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1120-4EE36-0AA0?","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":"What is the breaking capacity of 3VA1120-4EE36-0AA0 at 415 V?","answer":"75.6 kA at 415 V AC, which covers most industrial fault-current scenarios below that voltage level."},{"question":"Will 3VA1120-4EE36-0AA0 drop into a panel built for 3VA1110-5ED36-0AA0?","answer":"Yes — same 76.2 mm width, 130 mm height, and 70 mm depth. Terminal layout is identical, so no rewiring is needed for the swap."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-4EE36-0AA0","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/3VA1120-4EE36-0AA0 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}}