{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-3EF32-0CC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-3EF32-0CC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-3EF32-0CC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF32-0CC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-3EF32-0CC0, molded case circuit breaker, 3-pole, 20 A rated continuous current, TM240 thermal-magnetic release, interrupting ratings 75.6 kA at 240 V AC / 52.5 kA at 415 V AC.","salesMarkdown":"## Line protection MCCB with integrated undervoltage release The Siemens SENTRON 3VA1120-3EF32-0CC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 20 A at 40 °C through 50 °C, with a TM240 thermal-magnetic overcurrent release. Its interrupting capacity reaches 75.6 kA at 240 V AC, 52.5 kA at 415 V AC, 32 kA at 440 V AC, and 10.5 kA at 690 V AC — figures that govern fault-clearing capability in distribution panels where the available fault current is known. Rated continuous current holds at 20 A from 40 °C to 50 °C ambient, then derates 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 — a linear drop of roughly 0.4 A per 5 °C step above 50 °C that must be factored into panel thermal calculations. Dimensions are 130 mm height, 76.2 mm width, 70 mm depth, with IP40 protection on the front — fits standard SENTRON mounting footprints and panel cutouts for 3VA frame sizes. Mechanical endurance 15,000 cycles. ## What the interrupting ratings mean for coordination The 75.6 kA at 240 V and 52.5 kA at 415 V are the maximum fault currents this MCCB can safely interrupt at those voltages — critical for selectivity studies where the upstream breaker must have a higher or equal interrupting rating to avoid cascading failure.","metaTitle":"Siemens 3VA1120-3EF32-0CC0 SENTRON MCCB, 20 A, 3-Pole, 75.6","metaDescription":"Siemens SENTRON 3VA1120-3EF32-0CC0 molded case circuit breaker, 20 A rated, 3-pole, 75.6 kA interrupting at 240 V. TM240 release, undervoltage release included. Active production.","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":"75.6 kA","at 415 V":"52.5 kA","at 440 V":"32 kA","at 690 V":"10.5 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":"No","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":"Yes","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Auxiliary contact version":"2 auxiliary switches 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":"Undervoltage release (UVR)","Ground fault monitoring version":"Without","Of The Integrated Auxiliary Trip":"3VA9608-0BB24","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":"3VA9988-0AA12","Switching capacity class of the circuit breaker":"N","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":"lug terminal","Arrangement of electrical connectors / for main current circuit":"Front terminal","Type of connectable conductor cross-section, connection screw, width x thickness , max.":"17 x 6.5","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"12 x 0"}},"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=200122&mlfb=3VA1120-3EF32-0CC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF32-0CC0/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to 3VA1120-3EF32-0CC0?","answer":"The 3VA1112-5EF32-0CA0 is a peer in the same SENTRON 3VA family with a different release and auxiliary configuration. The 3VA1120-3EF32-0CC0 carries a TM240 release and integrated undervoltage release, while the 3VA1112-5EF32-0CA0 uses a different release type — verify the release and aux contact count before substituting in a panel designed around this order code."},{"question":"Will 3VA1120-3EF32-0CC0 drop into a panel designed for 3VA1112-5EF32-0CA0?","answer":"Both are 3-pole SENTRON 3VA frame breakers with the same mounting footprint and dimensions, so physical fit is identical. The difference is in the release and aux contact configuration — the 3VA1120-3EF32-0CC0 has a TM240 release and integrated undervoltage release, while the 3VA1112-5EF32-0CA0 uses a different release. Rewiring is not required, but the protection settings differ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-3EF32-0CC0","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/3VA1120-3EF32-0CC0 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}}