{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-3EF32-0AH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-3EF32-0AH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-3EF32-0AH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF32-0AH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-3EF32-0AH0, 3-pole molded case circuit breaker, 20 A rated continuous current, TM240 thermal-magnetic release, line protection version.","salesMarkdown":"This is a straightforward, fixed-trip breaker for standard branch-circuit protection in distribution panels. ## Breaking capacity — what it clears and where This MCCB delivers 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V. At 415 V, the 52.5 kA figure gives comfortable headroom above typical 25–36 kA utility fault levels in most industrial panels. At 690 V, the 10.5 kA rating is lower but still covers many motor-control center applications. At 55 °C it derates to 19.2 A; at 60 °C to 18.8 A; at 65 °C to 18.4 A; at 70 °C to 18 A. Above that, the continuous load must be reduced accordingly. The TM240 release has a maximum adjustable time setting of 1 second for the long-time delay. ## Physical fit and auxiliary contacts Footprint is 76.2 mm wide, 130 mm high, 70 mm deep — standard 3-pole MCCB width for DIN-rail or screw-mount panel integration.","metaTitle":"Siemens 3VA1120-3EF32-0AH0 SENTRON MCCB, 20 A, 3-Pole, Line","metaDescription":"Siemens 3VA1120-3EF32-0AH0 SENTRON molded case circuit breaker, 20 A rated, 3-pole, TM240 release. Breaking capacity 75.6 kA at 240 V. Active production. Quoted on request.","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":"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":"2 auxiliary switches + 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":"3","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","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=329891&mlfb=3VA1120-3EF32-0AH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF32-0AH0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1120-3EF32-0AH0 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time."},{"question":"What is the breaking capacity of 3VA1120-3EF32-0AH0 at different voltages?","answer":"It interrupts 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V."},{"question":"Does 3VA1120-3EF32-0AH0 have auxiliary contacts?","answer":"Yes, it comes with 2 auxiliary switches plus 1 trip alarm switch (HQ type)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-3EF32-0AH0","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/3VA1120-3EF32-0AH0 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}}