{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-4EF32-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-4EF32-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-4EF32-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF32-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1 series molded case circuit breaker, order code 3VA1120-4EF32-0AA0, 3-pole, 20 A rated at 40 °C, TM240 thermal-magnetic release, interrupting ratings 121 kA at 240 V AC and 75.6 kA at 415 V AC.","salesMarkdown":"## Siemens 3VA1120-4EF32-0AA0 — 20 A MCCB, Line Protection, Current Lifecycle Its 20 A continuous rating holds across the 40 °C to 55 °C band without derating, then steps to 19 A at 60 °C through 70 °C — useful when the breaker sits near other heat sources in a crowded panel. Interrupting capacity is the headline here: 121 kA at 240 V AC, 75.6 kA at 415 V AC, 52.5 kA at 440 V AC, and 11.9 kA at both 500 V and 690 V AC. The 3-pole format and IP40 front protection suit it for general-purpose panel mounting where the breaker face is behind a closed door. No official successor has been published for this order code. The 3VA1 series remains Siemens' standard MCCB platform for line protection, so no near-term end-of-life is signaled. The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a compact 3-pole footprint that fits standard Siemens 3VA1 panel cutouts and busbar systems. ## Technical Notes for the Specifier Maximum power loss is 12 W at rated current — a modest figure that simplifies thermal management in sealed enclosures. For DC applications, the manufacturer directs specifiers to the 3VA molded case circuit breaker device manual for switching power values — the 500 V DC maximum operating voltage is listed, but coordination data for DC networks is handled separately.","metaTitle":"Siemens 3VA1120-4EF32-0AA0 SENTRON MCCB, 20A, 3-Pole, 121kA","metaDescription":"Siemens 3VA1120-4EF32-0AA0 SENTRON molded case circuit breaker, 20A, 3-pole, TM240 release, 121kA interrupting at 240V AC, 75.6kA at 415V. Current lifecycle stage. Quoted 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":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 kA","at 500 V":"11.9 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":"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","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","Undervoltage Release":"No","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","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","operating voltage / at AC / rated value":"690 V","Max. rated operational voltage Ue with DC":"500 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","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":"S","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":"https://cdn.aoctrl.com/00f119d9d2fdfa4235d0b8b2c59231ea.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=123605&mlfb=3VA1120-4EF32-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF32-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1120-4EF32-0AA0 and how is it quoted?","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 are the interrupting ratings for 3VA1120-4EF32-0AA0?","answer":"Interrupting capacity is 121 kA at 240 V AC, 75.6 kA at 415 V AC, 52.5 kA at 440 V AC, and 11.9 kA at both 500 V and 690 V AC."},{"question":"What is the 3VA1120-4EF32-0AA0's depth and width for panel fit?","answer":"Depth is 70 mm, width is 76.2 mm, and height is 130 mm."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-4EF32-0AA0","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/3VA1120-4EF32-0AA0 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}}