{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-4EF32-0AG0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-4EF32-0AG0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-4EF32-0AG0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF32-0AG0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-4EF32-0AG0, molded case circuit breaker, 3-pole, 20 A rated, 121 kA interrupting at 240 V AC, TM240 thermal-magnetic release, line protection design.","salesMarkdown":"Its TM240 thermal-magnetic release handles overload and short-circuit trip curves without undervoltage or shunt-trip add-ons — that's another SKU I don't need on the shelf. Interrupting capacity hits 121 kA at 240 V AC and still delivers 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V — enough headroom for most industrial service-entrance or feeder panels without cascading upstream breakers. Power dissipation maxes at 12 W — negligible in a ventilated enclosure but worth noting for sealed, high-density layouts. Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — standard 3-pole MCCB footprint for DIN-rail or screw-mount panel integration. The 70 mm depth keeps it clear of shallow backpanels and leaves room for rear bus connections. Trip indicator is present, so a quick visual scan tells you which breaker opened. The base switch part number is 3VA11204EF320AA0 — useful for cross-referencing internal BOMs or ordering the switching mechanism separately if the trip unit is field-replaceable.","metaTitle":"Siemens 3VA1120-4EF32-0AG0 SENTRON MCCB, 20A, 3-Pole, 121kA","metaDescription":"Siemens SENTRON 3VA1120-4EF32-0AG0 molded case circuit breaker, 20A rated, 3-pole, 121kA interrupting at 240V. Active production. Quoted to order.","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":"Yes","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":"1 auxiliary switch + 1 trip alarm switch HP","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":"3VA9988-0AB11","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=509762&mlfb=3VA1120-4EF32-0AG0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF32-0AG0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1120-4EF32-0AG0 and how do I get a price?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is 3VA1120-4EF32-0AG0's listed depth?","answer":"The listed depth is 70 mm (2.76 in), which fits standard shallow backpanels and leaves clearance for rear bus connections."},{"question":"What is 3VA1120-4EF32-0AG0's listed width?","answer":"The listed width is 76.2 mm (3 in), matching the standard 3-pole MCCB footprint for DIN-rail or screw-mount installation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-4EF32-0AG0","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/3VA1120-4EF32-0AG0 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}}