{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-5EF32-0AC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-5EF32-0AC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-5EF32-0AC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5EF32-0AC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-5EF32-0AC0, 3-pole molded case circuit breaker, 20 A rated continuous current, TM240 thermal-magnetic release, breaking capacity 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, 17 kA at 690 V.","salesMarkdown":"Its 20 A continuous current (Iu) holds at ambient up to 50 °C without derating; above that the thermal curve drops to 19.2 A at 55 °C and 18 A at 70 °C — relevant if the panel runs hot near the top of a sealed enclosure. The TM240 overcurrent release is a fixed thermal-magnetic type — no adjustable trip curve, so it's a straight swap for a panel that already calls for a 20 A TM240 MCCB. Auxiliary contacts come as 2 HQ switches, which is enough to signal the breaker state back to a PLC or status lamp without an add-on module. ## Breaking capacity — what the voltages mean This MCCB delivers 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V. That 187 kA at 240 V is the headline number for North American 240/120 V split-phase or 240 V three-phase panels; the 121 kA at 415 V covers most European 400 V industrial grids. Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures.","metaTitle":"Siemens 3VA1120-5EF32-0AC0 SENTRON MCCB, 20 A, 187 kA at 240","metaDescription":"Siemens 3VA1120-5EF32-0AC0 SENTRON molded case circuit breaker, 20 A rated, 3-pole, TM240 release, 187 kA at 240 V. Active production, sourced 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":"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":"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 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":"3VA9988-0AA12","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":"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=33761&mlfb=3VA1120-5EF32-0AC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5EF32-0AC0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1120-5EF32-0AC0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the breaking capacity of 3VA1120-5EF32-0AC0 at different voltages?","answer":"At 240 V it interrupts 187 kA, at 415 V it interrupts 121 kA, at 440 V it interrupts 75.6 kA, and at 690 V it interrupts 17 kA."},{"question":"Will 3VA1120-5EF32-0AC0 drop into a panel built for 3VA1110-5EE32-0JA0?","answer":"Both are 3-pole SENTRON MCCBs with the same 130 mm height, 76.2 mm width, and 70 mm depth, so the physical footprint is identical. The key difference is the overcurrent release: the 3VA1120-5EF32-0AC0 uses a TM240 release, while the 3VA1110-5EE32-0JA0 uses a different release variant — verify the trip curve matches your application before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-5EF32-0AC0","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/3VA1120-5EF32-0AC0 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}}