{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1220-4EF32-0AC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1220-4EF32-0AC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1220-4EF32-0AC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1220-4EF32-0AC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1220-4EF32-0AC0, molded case circuit breaker, 3-pole, TM240 thermal-magnetic release, 200 A at 40 °C, 121 kA breaking capacity at 240 V.","salesMarkdown":"The Siemens 3VA1220-4EF32-0AC0 is a 3-pole SENTRON molded case circuit breaker (MCCB) with a TM240 thermal-magnetic release, rated 200 A continuously at 40 °C. At 240 V it interrupts 121 kA symmetrical, enough to handle most secondary-side transformer faults or high-fault panel feeds without cascading upstream. ## Rated current across the temperature range This breaker holds its full 200 A rating from 40 °C through 50 °C, then derates linearly: 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, and 176 A at 70 °C. The thermal-magnetic release responds to ambient heat; packing multiple breakers in a small enclosure without de-rating is a common miss that causes nuisance tripping on warm days. ## Breaking capacity by voltage level The interrupting ratings step down with system voltage: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, 17 kA at 500 V, and 11.9 kA at 690 V. For a 480 V panel in North America you'd use the 440 V figure (52.5 kA) as the conservative benchmark — that's the closest standard voltage below 480 V. That 52.5 kA SCCR headroom covers most industrial distribution boards; only high-fault petrochemical or data-centre feeds would need a higher-rated frame. ## Physical fit and auxiliary switch Dimensions: 105 mm wide, 158 mm high, 70 mm deep — a standard 3-pole MCCB footprint for Siemens SENTRON 3VA frames. The supplied basic switch code is 3VA12204EF320AA0, which is the internal switching mechanism; you order the full assembly as the 3VA1220-4EF32-0AC0.","metaTitle":"Siemens 3VA1220-4EF32-0AC0 SENTRON MCCB, 200 A, 3-Pole, TM24","metaDescription":"Siemens 3VA1220-4EF32-0AC0 SENTRON molded case circuit breaker, 200 A rated at 40 °C, 3-pole, TM240 thermal-magnetic release, 121 kA breaking at 240 V. Active production, sourced t","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"105 mm","Height":"158 mm","Maximum":"0 A","Minimum":"0 A","at 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 kA","at 500 V":"17 kA","at 690 V":"11.9 kA","at 40 °C":"200 A","at 45 °C":"200 A","at 50 °C":"200 A","at 55 °C":"194 A","at 60 °C":"188 A","at 65 °C":"182 A","at 70 °C":"176 A","Depth [In]":"2.76 in","Width [In]":"4.13 in","Height [In]":"6.22 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":"42 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA12204EF320AA0","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":"S","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=568373&mlfb=3VA1220-4EF32-0AC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1220-4EF32-0AC0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this breaker at 240 V?","answer":"121 kA at 240 V. At 415 V it interrupts 75.6 kA, at 440 V it handles 52.5 kA, at 500 V it's rated 17 kA, and at 690 V it breaks 11.9 kA."},{"question":"Where can I buy the 3VA1220-4EF32-0AC0?","answer":"This part is sourced to order against an RFQ through our independent distribution channel. Submit a request for quote; availability and current pricing are confirmed at quote time."},{"question":"Does this breaker include auxiliary contacts?","answer":"Yes, it ships with 2 factory-fitted HQ-type auxiliary switches for status indication. No undervoltage release or ground-fault module is included on this variant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1220-4EF32-0AC0","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/3VA1220-4EF32-0AC0 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}}