{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-5EF32-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-5EF32-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-5EF32-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5EF32-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-5EF32-0AA0, 3-pole molded case circuit breaker, 20 A rated current, TM240 thermal-magnetic release, 187 kA breaking capacity at 240 VAC.","salesMarkdown":"The Siemens 3VA1120-5EF32-0AA0 is a 3-pole SENTRON molded case circuit breaker rated for 20 A continuous at 40 °C, with a TM240 thermal-magnetic release and a maximum breaking capacity of 187 kA at 240 VAC. At 415 V the breaking capacity is 121 kA; at 440 V it drops to 75.6 kA, and at 500 V or 690 V it holds at 17 kA — the SCCR headroom shrinks with voltage, so verify your system's available fault current at the point of installation. The TM240 release combines a thermal bimetal for overload protection (trip curve shaped to motor or feeder inrush) with a magnetic short-circuit element adjustable up to 320 A (li max) for selective coordination downstream. At 60 °C it drops to 19 A, and at 70 °C it's still 19 A, so a 20 A load in a 60 °C ambient requires a frame size up. Maximum power loss is 12 W at rated current — negligible for panel thermal budgeting, but worth noting if several breakers cluster in a small enclosure without forced ventilation. Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a compact 3-pole frame that fits standard 3-inch-wide panel cutouts and leaves room for side-by-side mounting on a DIN rail or direct screw-mount plate. Optional motor drive (Product Extension / Optional / Motor Drive: Yes) allows remote motorized operation for automated disconnection or reset in unmanned substations. The IEC 81346-2 reference code is Q (switching device), which aligns with standard panel labeling conventions for circuit breakers in industrial schematics.","metaTitle":"Siemens 3VA1120-5EF32-0AA0 SENTRON MCCB, 20 A, 187 kA at 240","metaDescription":"Siemens SENTRON 3VA1120-5EF32-0AA0 molded case circuit breaker, 3-pole, 20 A rated, TM240 release, 187 kA breaking at 240 VAC. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","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 500 V":"17 kA","at 690 V":"17 kA","at 40 °C":"20 A","at 45 °C":"20 A","at 50 °C":"20 A","at 55 °C":"20 A","at 60 °C":"19 A","at 65 °C":"19 A","at 70 °C":"19 A","Depth [In]":"2.76 in","Width [In]":"3 in","Height [In]":"5.12 in","Number Of Poles":"3","Product version":"Line protection","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"12 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","rated insulation voltage Ui":"800 V","Courant permanent assigné Iu":"20 A","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 IEC 81346-2":"Q","Max. rated operational voltage Ue with DC":"500 V","Product Extension / Optional / Motor Drive":"Yes","Adjustable response value current / li max.":"320 A","Adjustable response value current / li min.":"160 A","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"M","Max. rated operational current of the frame size":"160 A","Mechanical Service Life (Switching Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"nut keeper kit on both ends","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 mm","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"12 x 1 mm"}},"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=400166&mlfb=3VA1120-5EF32-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5EF32-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Does 3VA1120-5EF32-0AA0 include ground-fault monitoring or communication?","answer":"No. This MCCB has no ground-fault monitoring, no communication function, and no other measurement function — it is a standard thermal-magnetic breaker without smart features."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-5EF32-0AA0","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/3VA1120-5EF32-0AA0 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}}