{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-5EF36-0AC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-5EF36-0AC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-5EF36-0AC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5EF36-0AC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-5EF36-0AC0, molded case circuit breaker, 3-pole, 20 A, TM240 thermal-magnetic release, 187 kA interrupting at 240 VAC.","salesMarkdown":"The Siemens SENTRON 3VA1120-5EF36-0AC0 is a 3-pole molded case circuit breaker rated 20 A continuous at 40 °C, with a TM240 thermal-magnetic trip unit. Two built-in auxiliary switches HQ come standard, saving a slot on the DIN rail for the next breaker. At 440 V it still breaks 75.6 kA, and at 500 V or 690 V it holds 17 kA. That means this breaker can be the main disconnect on a 415 V switchboard with a transformer-fed fault current up to 121 kA — no need to cascade a current-limiting fuse upstream. The TM240 thermal-magnetic release handles overloads and short-circuits in one package; no electronic trip unit to program or battery to maintain. ## Thermal derating — it holds 20 A through 55 °C That gives you headroom in a hot panel — no need to oversize the breaker for a 50 °C ambient. Power loss is 12 W at full load, which matters for heat buildup in a sealed enclosure. It clips onto the DIN rail or mounts via rear screw terminals. ## Auxiliary switches and options Comes with two auxiliary switches HQ (high-qualified) built in — no separate order for a signal contact. It's a bare line-protection breaker with the aux contacts as the only add-on. If you need shunt trip or UVR, that's a different order code in the 3VA family.","metaTitle":"Siemens 3VA1120-5EF36-0AC0 SENTRON MCCB, 20 A, 187 kA at 240","metaDescription":"Siemens SENTRON 3VA1120-5EF36-0AC0 molded case circuit breaker, 3-pole, 20 A, TM240 release, 187 kA at 240 VAC. Active production. Quoted to order.","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":"187 kA","at 415 V":"121 kA","at 440 V":"75.6 kA","at 500 V":"17 kA","at 690 V":"17 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":"3VA11205EF360AA0","Design Of The Auxiliary Switch":"2 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":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","Switching Capacity Class Of The Circuit Breaker":"M","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=120921&mlfb=3VA1120-5EF36-0AC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5EF36-0AC0/alternatives.json"},"ai":{"faq":[{"question":"Will 3VA1120-5EF36-0AC0 drop into a panel specified around 3VA1110-5ED36-0AC0?","answer":"Both are 3-pole SENTRON MCCBs on the same 3VA frame — same 70 mm depth, 76.2 mm width, and DIN-rail mounting. The difference is the trip rating and interrupting capacity; the physical fit is identical."},{"question":"What is the width of 3VA1120-5EF36-0AC0?","answer":"76.2 mm (3 inches), standard 3-pole MCCB width for the SENTRON 3VA platform."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-5EF36-0AC0","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/3VA1120-5EF36-0AC0 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}}