{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-4EF36-0BC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-4EF36-0BC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-4EF36-0BC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF36-0BC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-4EF36-0BC0, molded case circuit breaker, 3-pole, 20 A, line protection, with undervoltage release and 2 auxiliary switches HQ, SCCR 121 kA at 240 V.","salesMarkdown":"The Siemens 3VA1120-4EF36-0BC0 is a 3-pole SENTRON molded case circuit breaker rated for line protection, carrying a continuous current of 20 A across the 40 °C to 55 °C ambient range, derating to 19 A at 60 °C through 70 °C. Its interrupting 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 — figures that define the available fault current the breaker can safely clear at each voltage level, critical for SCCR compliance in the panel. At 76.2 mm wide, 130 mm tall, and 70 mm deep, this MCCB occupies three standard 25 mm DIN-rail modules — verify the gland plate and adjacent device spacing before committing the backpanel layout.","metaTitle":"Siemens 3VA1120-4EF36-0BC0 SENTRON MCCB, 20 A, 3-Pole, 121 k","metaDescription":"Siemens 3VA1120-4EF36-0BC0 SENTRON molded case circuit breaker, 20 A, 3-pole, line protection, with undervoltage release and 2 auxiliary switches. SCCR 121 kA at 240 V. Active prod","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":"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":"3VA11204EF360AA0","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":"3VA9608-0BB11","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":"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=115394&mlfb=3VA1120-4EF36-0BC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF36-0BC0/alternatives.json"},"ai":{"faq":[{"question":"Does 3VA1120-4EF36-0BC0 include an undervoltage release?","answer":"Yes, it ships with a factory-fitted undervoltage release (UVR) and two auxiliary switches (HQ design) for status feedback."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-4EF36-0BC0","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/3VA1120-4EF36-0BC0 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}}