{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-4EE32-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-4EE32-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-4EE32-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EE32-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-4EE32-0AA0, molded case circuit breaker, 3-pole, 20 A rated at 40 °C, TM220 release, line protection, breaking capacity 121 kA at 240 V AC.","salesMarkdown":"The Siemens SENTRON 3VA1120-4EE32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated 20 A at 40 °C, designed for line protection in distribution panels. ## Breaking capacity across voltages Breaking capacity drops as voltage rises: 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. At 690 V the 11.9 kA figure is the limiting factor — verify the available fault current at the point of installation before specifying this breaker for a 690 V feeder. The 3-pole frame and 70 mm depth fit standard panel layouts; front-side IP40 protection suits indoor enclosures where tools or fingers won't contact live parts. ## Integration notes The 76.2 mm width (3 in) occupies three 18 mm module spaces on a DIN rail — plan for that footprint during panel layout. The TM220 release is fixed — not field-interchangeable — so confirm the 20 A rating matches the protected circuit before installation.","metaTitle":"Siemens 3VA1120-4EE32-0AA0 SENTRON MCCB, 20 A, 3-Pole, 121 k","metaDescription":"Siemens SENTRON 3VA1120-4EE32-0AA0 molded case circuit breaker, 20 A rated, 3-pole, TM220 release. Breaking capacity 121 kA at 240 V. Current production. Sourced to order against R","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":"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/9d6266fd720ffc7071057ac5f6cb578d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=139905&mlfb=3VA1120-4EE32-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EE32-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1120-4EE32-0AA0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at the time of quote — submit an RFQ for a firm price and lead time."},{"question":"What is the breaking capacity of 3VA1120-4EE32-0AA0 at 240 V?","answer":"The breaking capacity is 121 kA at 240 V AC, which allows this MCCB to clear high fault currents typical of main feeders in industrial panels without cascading upstream."},{"question":"What is the difference between 3VA1120-4EE32-0AA0 and 3VA1110-5ED32-0AA0?","answer":"The 3VA1110-5ED32-0AA0 is a lower-rated variant in the same SENTRON 3VA family. The 3VA1120-4EE32-0AA0 carries a 20 A TM220 release and 121 kA breaking capacity at 240 V, while the 3VA1110-5ED32-0AA0 uses a different release and rating. Physical dimensions (70 mm depth, 76.2 mm width, 3-pole) are shared, so panel cutouts and wiring positions are identical — the swap is a straight drop-in if the ampacity matches the circuit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-4EE32-0AA0","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/3VA1120-4EE32-0AA0 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}}