{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-3EF32-0AC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-3EF32-0AC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-3EF32-0AC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF32-0AC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-3EF32-0AC0, molded case circuit breaker, 3-pole, 20 A rated at 40 °C, 75.6 kA interrupting at 240 V, TM240 thermal-magnetic release, line protection design.","salesMarkdown":"It carries a continuous rating of 20 A at 40 °C, holds that same 20 A all the way up to 55 °C, then derates to 19 A at 60–70 °C. That thermal curve means it handles a full 20 A load in most ventilated enclosures without nuisance tripping. Interrupting capacity is where this frame earns its keep: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. That's a high-interrupting frame — it clears severe faults without cascading upstream, which matters when the transformer or generator can dump serious current into a bolted fault. The auxiliary switch block is built as two HQ auxiliary switches, and the basic switch variant is 3VA11203EF320AA0. The 3VA1120-3EF32-0AC0 measures 130 mm tall, 76.2 mm wide, and 70 mm deep — a compact 3-pole MCCB footprint that fits standard Siemens SENTRON mounting plates and busbar systems. Width is 3 inches exactly, which is the standard MCCB pole pitch for panel layout. Depth of 70 mm (2.76 in) leaves room for rear busbar connections in a typical 200 mm deep enclosure. For BOM freeze or compliance documentation needs: the SENTRON series carries UL, CSA, IEC, and CE certifications as standard. RoHS and REACH declarations are available through the Siemens support portal. No special compliance documentation is required beyond the standard manufacturer declarations.","metaTitle":"Siemens 3VA1120-3EF32-0AC0 SENTRON MCCB, 20 A, 3-Pole, 75.6","metaDescription":"Siemens SENTRON 3VA1120-3EF32-0AC0 molded case circuit breaker, 20 A rated, 3-pole, 75.6 kA interrupting capacity at 240 V. Active production. Sourced to order against RFQ.","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","Maximum":"0 A","Minimum":"0 A","at 240 V":"75.6 kA","at 415 V":"52.5 kA","at 440 V":"32 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","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Line protection","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","Of The Supplied Basic Switch":"3VA11203EF320AA0","Design Of The Auxiliary Switch":"2 auxiliary switches HQ","Ground-Fault Monitoring Version":"Without","Insulation Voltage / Rated Value":"800 V","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","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"500 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","Switching Capacity Class Of The Circuit Breaker":"N","Mechanical Service Life (Operating 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"}},"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=104041&mlfb=3VA1120-3EF32-0AC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF32-0AC0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting capacity of this breaker at different voltages?","answer":"75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V."},{"question":"What are the physical dimensions of the 3VA1120-3EF32-0AC0?","answer":"130 mm tall, 76.2 mm (3 in) wide, and 70 mm (2.76 in) deep."},{"question":"Where can I buy the 3VA1120-3EF32-0AC0 and get current pricing?","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 compliance documentation does this breaker carry?","answer":"The SENTRON series carries UL, CSA, IEC, and CE certifications as standard, with RoHS and REACH declarations available through Siemens."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-3EF32-0AC0","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/3VA1120-3EF32-0AC0 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}}