{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-4EF32-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-4EF32-0AB0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-4EF32-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF32-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-4EF32-0AB0, molded case circuit breaker, 3-pole, 20 A, TM240 thermal-magnetic release, 121 kA at 240 V, 70 mm depth.","salesMarkdown":"## Line protection MCCB — 20 A, 121 kA interrupting capacity Its TM240 thermal-magnetic release provides fixed overload and short-circuit protection without an auxiliary release or undervoltage release fitted. The 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 690 V — figures that govern its fault-clearing capability at the panel's available fault current. That means a panel running at 55 °C can only load this breaker to 19.2 A continuous; at 65 °C, 18.4 A. Two HP auxiliary switches are built in, but there is no trip indicator, no communication function, no phase failure detection, and no ground fault monitoring — this is a straightforward thermal-magnetic breaker for basic feeder or branch protection in a distribution panel. The 3VA1120-4EF32-0AB0 measures 76.2 mm wide, 130 mm high, and 70 mm deep.","metaTitle":"Siemens 3VA1120-4EF32-0AB0 MCCB, 20 A, 121 kA at 240 V","metaDescription":"Siemens SENTRON 3VA1120-4EF32-0AB0 molded case circuit breaker, 3-pole, 20 A, TM240 release, 121 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":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 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":"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":"No","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Auxiliary contact version":"2 auxiliary switches HP","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":"3VA9988-0AA11","Switching capacity class of the circuit breaker":"S","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=380712&mlfb=3VA1120-4EF32-0AB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF32-0AB0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA1120-4EF32-0AB0?","answer":"Submit an RFQ through the storefront. Availability and current pricing are confirmed at quote time through independent distribution channels."},{"question":"What is 3VA1120-4EF32-0AB0's interrupting capacity at 415 V?","answer":"The breaking capacity is 75.6 kA at 415 V. At 240 V it reaches 121 kA, at 440 V it is 52.5 kA, and at 690 V it is 11.9 kA."},{"question":"Will 3VA1120-4EF32-0AB0 drop into a panel specified around 3VA1110-5EE32-0JA0 without rewiring?","answer":"Yes — both are 3-pole SENTRON 3VA breakers sharing the same 76.2 mm width, 130 mm height, and 70 mm depth, so the cutout and DIN-rail footprint are identical. No rewiring needed for the mechanical fit."},{"question":"What compliance documentation does this brand provide for 3VA1120-4EF32-0AB0?","answer":"As a SENTRON series MCCB, it carries IEC 60947-2 certification. RoHS and REACH declarations are available from Siemens documentation. Specific UL listing status should be verified against the nameplate marking on the unit received."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-4EF32-0AB0","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/3VA1120-4EF32-0AB0 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}}