{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-3EF32-0DA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-3EF32-0DA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-3EF32-0DA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF32-0DA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-3EF32-0DA0, 3-pole molded case circuit breaker, 20 A rated continuous current, TM240 thermal-magnetic release, 75.6 kA breaking capacity at 240 V.","salesMarkdown":"The 3-pole design breaks up to 75.6 kA at 240 V and still clears 52.5 kA at 415 V, so it handles high available fault current on the secondary side of a typical 480 V–208Y/120 V transformer without needing a current-limiting fuse upstream. The TM240 release is a thermal-magnetic fixed-trip — no interchangeable rating plugs, no dial adjustment. That means the 20 A frame is locked; if the load draw changes, the breaker itself gets swapped, not just the trip unit. The thermal curve tracks the 20 A rating across ambient from 40 °C to 70 °C, derating from 20 A at 50 °C down to 18 A at 70 °C, which matters when the breaker lives in a crowded, warm enclosure. The UVR is wired separately from the main power path; the release coil draws from a control supply, not the load side. This MCCB's interrupting rating varies sharply with system voltage, which is typical for a thermal-magnetic breaker: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V. On a 480 V wye system (phase-to-ground 277 V, phase-to-phase 480 V), the relevant rating is the 415 V or 440 V figure — the breaker is rated for the line-to-line voltage of the circuit it protects. For a 480 V delta corner-grounded system, the 440 V rating applies. The 690 V figure covers 600 V class Canadian and some IEC industrial networks. The 3VA1 frame measures 76.2 mm wide, 130 mm tall, and 70 mm deep — a compact footprint that fits standard 3-pole MCCB spacing on a DIN rail or panel-mount base.","metaTitle":"Siemens 3VA1120-3EF32-0DA0 SENTRON MCCB, 20 A, 3-Pole, TM240","metaDescription":"Siemens 3VA1120-3EF32-0DA0 SENTRON molded case circuit breaker, 20 A rated, 3-pole, TM240 release, 75.6 kA at 240 V. 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","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":"Without","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":"3VA9608-0BB25","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":"0","Protective function of the overcurrent release":"LI","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=427864&mlfb=3VA1120-3EF32-0DA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF32-0DA0/alternatives.json"},"ai":{"faq":[{"question":"What is 3VA1120-3EF32-0DA0's listed depth on this component line?","answer":"The depth is 70 mm, with a width of 76.2 mm and height of 130 mm."},{"question":"Will 3VA1120-3EF32-0DA0 drop into a panel that was specified around 3VA1010-2ED32-0JA0 without rewiring?","answer":"Both are 3-pole SENTRON 3VA frame breakers sharing the same physical footprint (76.2 mm wide, 130 mm tall, 70 mm deep) and the same mounting pattern, so mechanical fit is identical. The electrical difference is the trip unit: 3VA1120-3EF32-0DA0 uses a fixed TM240 thermal-magnetic release rated 20 A, while the 3VA1010-2ED32-0JA0 uses a different trip rating. If the existing wiring and bus bars are sized for the new 20 A rating, the swap is drop-in; if the old breaker was a different ampacity, verify conductor sizing and coordination first."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-3EF32-0DA0","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/3VA1120-3EF32-0DA0 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}}