{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-4EF32-0CA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-4EF32-0CA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-4EF32-0CA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF32-0CA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-4EF32-0CA0, molded case circuit breaker, 3-pole, line protection, 20 A rated, 121 kA at 240 V, IP40 front.","salesMarkdown":"Breaking capacity hits 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V; at 690 V it still manages 11.9 kA. That spread means it can sit at the main or branch in a 480 V panel and still interrupt a serious fault without the arc flash climbing upstream. At 55 °C it derates to 19.2 A, at 60 °C to 18.8 A, at 65 °C to 18.4 A, and at 70 °C to 18 A. The front face is IP40, so it's fine inside a closed panel; no washdown rating, so keep it out of wet zones. Width is 76.2 mm (roughly 3 inches), depth 70 mm, height 130 mm. That footprint matches the standard SENTRON 3VA platform — if the panel was laid out for a 3VA11 frame, this drops in on the same mounting holes and bus connections. Lifecycle stage is current — Siemens still builds this exact variant. No phase-out notice, no last-time-buy. For a BOM line that needs an active MCCB with a known interrupting rating at multiple voltages, this part is a straight spec-in.","metaTitle":"Siemens 3VA1120-4EF32-0CA0 SENTRON MCCB, 20 A, 3-Pole, 121 k","metaDescription":"Siemens SENTRON 3VA1120-4EF32-0CA0 molded case circuit breaker, 20 A rated, 3-pole, line protection. Breaking capacity 121 kA at 240 V. 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","at 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 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":"19.2 A","at 60 °C":"18.8 A","at 65 °C":"18.4 A","at 70 °C":"18 A","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","Latching - endurance":"15 000","Undervoltage Release":"Yes","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Auxiliary contact version":"Without","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"20 A","Rated insulation voltage Ui":"800 V","Design of the auxiliary release":"Undervoltage release (UVR)","Ground fault monitoring version":"Without","Of The Integrated Auxiliary Trip":"3VA9608-0BB24","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","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"1","Adjustable response value time / tr min.":"1","Max. rated operational voltage Ue with DC":"500 V","Undervoltage Release With Leading Contact":"No","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"20 A","Adjustable response value current / li max.":"320 A","Adjustable response value current / li min.":"160 A","Adjustable response value current / lr min.":"14 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"0","Protective function of the overcurrent release":"LI","Switching capacity class of the circuit breaker":"S","Max. rated operational current of the frame size":"160 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"lug terminal","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","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"12 x 0"}},"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=165140&mlfb=3VA1120-4EF32-0CA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF32-0CA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1120-4EF32-0CA0 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ to get a firm price and lead time."},{"question":"Will 3VA1120-4EF32-0CA0 drop into a panel specified around 3VA1112-5EF32-0CA0 without rewiring?","answer":"Both are SENTRON 3VA frame breakers with the same 76.2 mm width, 70 mm depth, and 130 mm height, so the mechanical footprint is identical. The 3VA1112-5EF32-0CA0 carries a higher 125 A rating, so the bus and lug sizing must match the downstream load — the breaker itself will bolt in, but verify the conductor ampacity and the upstream protective device coordination before swapping."},{"question":"What compliance documentation does Siemens provide for 3VA1120-4EF32-0CA0?","answer":"Siemens typically supplies a CE declaration of conformity and a UKCA declaration for the SENTRON 3VA series. RoHS and REACH compliance are standard for current-production Siemens MCCBs. Specific certificates (UL, IEC) are available on request from the manufacturer or through the distributor at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-4EF32-0CA0","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/3VA1120-4EF32-0CA0 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}}