{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-5EF36-0AF0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-5EF36-0AF0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-5EF36-0AF0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5EF36-0AF0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-5EF36-0AF0, molded case circuit breaker, 3-pole, 20 A rated continuous current (Iu), TM240 thermal-magnetic release, 187 kA breaking capacity at 240 V, 70 mm depth, IP40 front.","salesMarkdown":"## SCCR and thermal derating — the real numbers that decide fit Its breaking capacity is the headline: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V. Thermal derating is flat from 40 °C to 50 °C at the full 20 A, then drops to 19.2 A at 55 °C, 18.8 A at 60 °C, 18.4 A at 65 °C, and 18 A at 70 °C. ## Auxiliary contacts and trip indication That gives you both a status signal for the breaker position and a separate alarm for a fault trip — useful for remote monitoring or PLC input without adding external relays. The trip indicator is present on the front, so a walk-by visual check confirms the breaker state. If you need those, this isn't the order code — the 3VA family has options for electronic releases and communication modules, but this one is a straight line-protection thermal-magnetic breaker. ## Physical fit — panel integration note That 76.2 mm width is a standard 3-pole MCCB footprint — 3 modules at 25.4 mm each — so it fits a standard DIN-rail or panel-mount cutout without surprises.","metaTitle":"Siemens 3VA1120-5EF36-0AF0 SENTRON MCCB, 20 A, 187 kA at 240","metaDescription":"Siemens 3VA1120-5EF36-0AF0 SENTRON molded case circuit breaker, 3-pole, 20 A rated continuous current, 187 kA breaking capacity at 240 V. Active production. Quoted to order against","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","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"75.6 kA","at 690 V":"17 kA","at 40 °C":"20 A","at 45 °C":"20 A","at 50 °C":"20 A","at 55 °C":"19.2 A","at 60 °C":"18.8 A","at 65 °C":"18.4 A","at 70 °C":"18 A","Trip indicator":"Yes","Number of poles":"3","Product version":"Line protection","Voltage trigger":"No","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"15 000","Undervoltage Release":"No","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Auxiliary contact version":"1 auxiliary switch + 1 trip alarm switch HQ","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"20 A","Rated insulation voltage Ui":"800 V","Design of the auxiliary release":"without auxiliaryrelease","Ground fault monitoring version":"Without","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","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"1","Adjustable response value time / tr min.":"1","Max. rated operational voltage Ue with DC":"500 V","Undervoltage Release With Leading Contact":"No","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"20 A","Adjustable response value current / li max.":"320 A","Adjustable response value current / li min.":"160 A","Adjustable response value current / lr min.":"14 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"2","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","Switching capacity class of the circuit breaker":"M","Max. rated operational current of the frame size":"160 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"box terminal","Arrangement of electrical connectors / for main current circuit":"Front terminal","Type of connectable conductor cross-section, round conductor terminal, stranded":"1 x (1.5 - 70 mm²)"}},"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=206464&mlfb=3VA1120-5EF36-0AF0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5EF36-0AF0/alternatives.json"},"ai":{"faq":[{"question":"Does 3VA1120-5EF36-0AF0 include auxiliary contacts?","answer":"Yes, it comes with one auxiliary switch and one trip alarm switch (HQ version) — gives both a status signal and a separate fault-trip alarm."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-5EF36-0AF0","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/3VA1120-5EF36-0AF0 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}}