{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-4EF36-0AE0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-4EF36-0AE0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-4EF36-0AE0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF36-0AE0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-4EF36-0AE0, 3-pole molded case circuit breaker, 20 A rated current, TM240 thermal-magnetic release, line protection design, 121 kA breaking capacity at 240 V.","salesMarkdown":"## MCCB for line protection — 20 A continuous, 121 kA interrupting Its TM240 thermal-magnetic release is fixed at 20 A and holds that rating from 40 °C through 55 °C; at 60 °C it derates to 19 A, and stays at 19 A up to 70 °C. Short-circuit breaking capacity reaches 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. The 3VA1120-4EF36-0AE0 occupies a 76.2 mm wide footprint on the DIN rail or mounting plate, with a depth of 70 mm and height of 130 mm. The 12 W power loss is conducted through the base and terminals — no fan required in a ventilated enclosure at 20 A continuous.","metaTitle":"Siemens 3VA1120-4EF36-0AE0 SENTRON MCCB, 3-pole 20A, 121kA @","metaDescription":"Siemens SENTRON 3VA1120-4EF36-0AE0 molded case circuit breaker, 3-pole, 20A rated at 40°C, 121kA breaking capacity at 240V. Line protection, TM240 release. Current lifecycle stage.","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":"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","Of The Supplied Basic Switch":"3VA11204EF360AA0","Design Of The Auxiliary Switch":"4 auxiliary switches HQ","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","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":"4","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=378281&mlfb=3VA1120-4EF36-0AE0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF36-0AE0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA1120-4EF36-0AE0 at 240 V?","answer":"121 kA at 240 V — the highest short-circuit rating in the 3VA1 line, suitable for high-fault-current installations."},{"question":"Will 3VA1120-4EF36-0AE0 drop into a panel designed for 3VA1110-5ED36-0AC0?","answer":"Both are 3-pole SENTRON MCCBs in the same 3VA1 frame with identical 76.2 mm width, 70 mm depth, and 130 mm height, so the mechanical footprint and DIN-rail mounting are the same. The key difference is the release: 3VA1120-4EF36-0AE0 uses a TM240 thermal-magnetic release rated 20 A, while the 3VA1110-5ED36-0AC0 uses a different release curve and rating — verify the trip characteristics match your load before swapping."},{"question":"Where can I buy 3VA1120-4EF36-0AE0?","answer":"Sourced and quoted to order against an RFQ through independent distribution channels — availability and current pricing confirmed at quote time."},{"question":"What compliance documentation is available for 3VA1120-4EF36-0AE0?","answer":"As a current-production SENTRON MCCB, standard Siemens documentation includes RoHS and REACH declarations, plus IEC/UL certification data sheets. Specific document requests should be included with the RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-4EF36-0AE0","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/3VA1120-4EF36-0AE0 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}}