{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-3EF36-0DC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-3EF36-0DC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-3EF36-0DC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF36-0DC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-3EF36-0DC0, molded case circuit breaker, 3-pole, 20 A (40 °C), 75.6 kA at 240 V, undervoltage release, 2 auxiliary switches HQ, line protection.","salesMarkdown":"The Siemens SENTRON 3VA1120-3EF36-0DC0 is a 3-pole molded case circuit breaker (MCCB) rated 20 A at 40 °C, with a breaking capacity of 75.6 kA at 240 V AC. With 75.6 kA at 240 V and 52.5 kA at 415 V, this MCCB handles high fault currents typical of main feeders. The interrupting rating drops to 32 kA at 440 V and 11.9 kA at 500 V or 690 V, so verify the available fault current at your system voltage before specifying. ## Current derating across temperature The breaker holds 20 A continuously from 40 °C through 55 °C, then derates to 19 A at 60 °C through 70 °C. ## Auxiliary and undervoltage release Two HQ auxiliary switches are built in, plus an undervoltage release (UVR). Width 76.2 mm (3 in), depth 70 mm (2.76 in), height 130 mm (5.12 in). The 3-pole footprint matches the SENTRON 3VA family, so a panel cutout for a 3VA1110 or 3VA1020 will accept this unit without rewiring the bus bars.","metaTitle":"Siemens 3VA1120-3EF36-0DC0 SENTRON MCCB, 20A, 75.6kA at 240V","metaDescription":"Siemens SENTRON 3VA1120-3EF36-0DC0 molded case circuit breaker, 20 A rated at 40 °C, 3-pole, 75.6 kA breaking at 240 V. Undervoltage release and 2 auxiliary switches. Current-produ","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"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":"75.6 kA","at 415 V":"52.5 kA","at 440 V":"32 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":"Yes","Design Of The Product":"Line protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"14.5 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA11203EF360AA0","Design Of The Auxiliary Switch":"2 auxiliary switches HQ","Design Of The Auxiliary Release":"undervoltage release (UVR)","Ground-Fault Monitoring Version":"Without","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"TM240","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","Of The Integrated Auxiliary Trip Unit":"3VA9608-0BB25","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":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","Switching Capacity Class Of The Circuit Breaker":"N","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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=139716&mlfb=3VA1120-3EF36-0DC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF36-0DC0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA1120-3EF36-0DC0 at 240 V?","answer":"75.6 kA at 240 V AC. At 415 V it is 52.5 kA, at 440 V it is 32 kA, and at 500 V or 690 V it is 11.9 kA."},{"question":"Will 3VA1120-3EF36-0DC0 drop into a panel specified for 3VA1110-5ED36-0AC0?","answer":"Yes. Both are 3-pole SENTRON MCCBs with the same 76.2 mm width, 70 mm depth, and 130 mm height, so the footprint and bus-bar spacing are identical."},{"question":"Where can I buy 3VA1120-3EF36-0DC0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability."},{"question":"What auxiliary switches does 3VA1120-3EF36-0DC0 include?","answer":"Two HQ auxiliary switches are built in, plus an undervoltage release (UVR). No ground-fault monitoring or communication module."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-3EF36-0DC0","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/3VA1120-3EF36-0DC0 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}}