{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-4EF32-0AE0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-4EF32-0AE0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-4EF32-0AE0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF32-0AE0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-4EF32-0AE0, molded case circuit breaker, 3-pole, 20 A rated current, 121 kA interrupting capacity at 240 VAC, line protection design.","salesMarkdown":"## Siemens 3VA1120-4EF32-0AE0 — SENTRON MCCB, Line Protection, 20 A The Siemens SENTRON 3VA1120-4EF32-0AE0 is a 3-pole molded case circuit breaker (MCCB) designed for line protection, rated at 20 A continuous current at 40 °C and carrying a 121 kA interrupting capacity at 240 VAC — enough to handle high-fault utility feeds without cascading upstream. Rated insulation voltage is 800 V, and the interrupting curve holds at 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V, so it covers 480Y/277 V and 600 V industrial services with headroom. The TM240 thermal-magnetic overcurrent release is fixed-trip, non-adjustable — set it and forget it for dedicated motor or feeder circuits where coordination studies have already locked the pickup. At 76.2 mm wide, 130 mm tall, and 70 mm deep, this 3-pole MCCB fits standard Siemens 3VA panel footprints and mounts via the rear screw-clamp or optional DIN-rail adapter — verify gland-plate clearance for the 70 mm depth when the breaker sits behind a deadfront. Power loss is 12 W maximum at rated load, so the enclosure thermal rise stays manageable in a grouped panel; no forced ventilation required unless the ambient exceeds 40 °C. ## Auxiliary Switching and Accessories Add those as separate accessories if the spec requires remote trip or GFCI. The trip indicator is absent on this version — visual flag is not provided; if panel walk-by inspection needs a clear tripped/on state, specify the variant with the mechanical flag.","metaTitle":"Siemens 3VA1120-4EF32-0AE0 SENTRON MCCB, 3-pole, 20 A, 121 k","metaDescription":"Siemens SENTRON 3VA1120-4EF32-0AE0 molded case circuit breaker, 3-pole, 20 A rated, 121 kA interrupting at 240 VAC. Active production. Quoted 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":"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","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":"3VA11204EF320AA0","Design Of The Auxiliary Switch":"4 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":"4","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=251235&mlfb=3VA1120-4EF32-0AE0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF32-0AE0/alternatives.json"},"ai":{"faq":[{"question":"Does 3VA1120-4EF32-0AE0 include auxiliary contacts?","answer":"Yes, it ships with a factory-fitted HQ auxiliary switch block providing 4 auxiliary contacts for status feedback."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-4EF32-0AE0","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/3VA1120-4EF32-0AE0 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}}